Interference Phase Research Articles

Quantification of relevant Brønsted acid sites on Cl-doped alumina catalysts for the isomerization of olefins

The characterization of surface acid sites is a major issue for the mechanistic understanding and activity prediction of a solid catalyst, especially for applications that require the use of bi-functional materials. The concentration of Brønsted acid sites is measured by two main methods: adsorption of a probe molecule, and catalytic activity in a model reaction. In a previous study, we reported that the adsorption of 2,6-di-tert-butylpyridine on the surface of alumina-supported reforming catalysts (PtSn/Al2O3–Cl) was very effective in determining the density of Brønsted acid sites. In this work, the acidity of reforming catalysts was studied through their activity in the model reaction of 3,3-dimethyl-1-butene isomerization. We have demonstrated that the activity of reforming catalysts is clearly correlated with the surface chlorine density and more extensively with the density of Brønsted acid sites as measured by the adsorption of 2,6-di-tert-butylpyridine. As a result, this study highlights the relevance of using 2,6-di-tert-butylpyridine adsorption in the characterization of the Brønsted acidity of an alumina with no metal phase interference.

Phase Synchronization and Magnitude Control With Interference Between Transmitters in Wireless Power Transfer

With coupling between transmitter (TX) coils, the weakly-activated TX experiences interference current from adjacent strong TX. The strong interference has prohibited the magnitude and phase control. We reveal two operating modes (called negative and positive) that simultaneously achieve magnitude and phase control of TX coil currents. The negative mode is for TX which is a victim of strong interference current originating from adjacent TX. This mode is chosen when the target level of TX coil current is lower than the interference level. At such mode, its inverter voltage should be significantly delayed with respect to adjacent TX to maintain phase synchronization and interference regulation. On the other hand, the positive mode is chosen when the target level of TX coil current is higher than interference current. Hence, the proposed controller first chooses one of the two modes depending on the target magnitude of TX coil currents. The phase of two TX coil currents are synchronized and their magnitude ratio is regulated to coupling ratio even with strong interference level. No additional power components or RF communication is required. High cross coupling between TXs is tolerable, increasing the flexibility in coil geometry.

Determination of Meteor Vector Velocity Using MU Interferometry Measurements of Head Echoes

A new method for measuring the vector velocity of meteoroids using meteor head echoes is proposed in this study. The lateral velocity is determined by utilizing the phase interference measurement between channels, while the radial velocity is obtained using a conventional Doppler frequency shift measurement. Compared to previous studies, this method does not require multi-site observations and can calculate the vector velocity of meteors in real-time. This paper provides the complete process for the inversion of the meteor vector velocity, detailing the analyzing process using MU radar head echo data. First, the MUSIC algorithm was used to estimate the DOA of the meteor target, which is a parameter required for lateral velocity measurement. Channel calibration is required before this estimation. Next, delay-Doppler matched filter processing was performed on each receiving channel’s data to determine the distance and radial velocity of the meteor target. Subsequently, the lateral velocity component was synthesized using the least squares method from the phase difference rate extracted from the matched filter output results of multiple channel pairs. Then, the vector velocity and trajectory of the meteor could be determined. The method was verified using MU radar head echo data. Different groups of channel pairs were selected for calculating the lateral velocity, and the results were found to be close, demonstrating the self-consistency of the method. Additionally, the calculated vector velocity is consistent with the direction and magnitude of the meteor’s motion trajectory, confirming the feasibility of the proposed approach. The method allows for the observation of more prominent characteristics of meteoroid motion, providing a more detailed observation capability of velocity variations in other directions than previous methods.

Using phase interference to characterize dynamic properties—a review of constant gradient, portable magnetic resonance methods

Spatially resolved motion-sensitized magnetic resonance (MR) is a powerful tool for studying the dynamic properties of materials. Traditional methods involve using large, expensive equipment to create images of sample displacement by measuring the spatially resolved MR signal response to time-varying magnetic field gradients. In these systems, both the sample and the stress applicator are typically positioned inside a magnet bore. Portable MR instruments with constant gradients are more accessible, with fewer limitations on sample size, and they can be used in industrial settings to study samples under deformation or flow. We propose a view in which the well-controlled sensitive region of a magnet array acts as an integrator, with the velocity distribution leading to phase interference in the detected signal, which encodes information on the sample’s dynamic properties. For example, in laminar flows of Newtonian and non-Newtonian fluids, the velocity distribution can be determined analytically and used to extract the fluid’s dynamic properties from the MR signal magnitude and/or phase. This review covers general procedures, practical considerations, and examples of applications in dynamic mechanical analysis and fluid rheology (viscoelastic deformation, laminar pipe flows, and Couette flows). Given that these techniques are relatively uncommon in the broader magnetic resonance community, this review is intended for both advanced NMR users and a more general physics/engineering audience interested in rheological applications of NMR.

Theory of Josephson current on a lattice model of grain boundary in d-wave superconductors

Identifying the origins of suppression of the critical current at grain boundaries of high-critical-temperature superconductors, such as cuprates and iron-based superconductors, is a crucial issue to be solved for future applications with polycrystalline materials. Although the dominant factor of current suppression might arise during material fabrication and/or processing, investigating it due to an internal phase change of the pair potential is an important issue in understanding the threshold of the critical current. In this paper, we study the Josephson current on a symmetric [001]-tilt grain boundary (GB) of a d-wave superconductor on a lattice model. In addition to the suppression of the maximum Josephson current associated with the internal phase change of the d-wave pair potential which has been predicted in continuum models, we find a unique phase interference effect due to folding of the Fermi surface in the lattice model. In particular, the resultant maximum Josephson current at low-tilting-angle regions tends to be suppressed more than that in preexisting theories. Because similar suppressions of the critical current at GBs have been reported in several experimental works, the present model can serve as a guide to clarify the complicated transport mechanism in GBs.

All-optical matching structure for multi-order modulation formats

With the development and popularity of the Internet, network security has become a popular topic. The traditional solution for screening the security of network information is to convert the signal transmitted in the optical fiber into an electrical signal through an optical conversion. Then we perform symbol matching within the electronic firewall to determine whether the signal is a risk. However, due to the limitation of carrier recovery time in the semiconductor, the photoelectric converter cannot handle signals with too high rate, and it also causes a large power consumption. To improve the efficiency and scalability of signal matching, we propose an all-optical matching structure. This structure can identify the position of the target sequence in the input data sequence in the all-optical environment, and the structure is suitable for any amplitude and phase modulation format. The matching result of each bit of the target sequence and input data sequence is obtained by phase delay and interference. Then the matching result of each bit of the target sequence and input data sequence is integrated by logic AND gate, regenerator, and delay line. Finally, the matching result between the whole target sequence and the input data sequence is obtained. This structure can avoid photoelectric transformation and processes the signal directly at the optical domain, which greatly reduces the consumption of time and energy. We use VPItransmissionMaker software to simulate and verify the structure. The length of the input signal during the simulation is 8 bits, the length of the target signal is 4 bits, and the transmission rate of the signal is 100 GBaud. We simulated the binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), 8-phase shift keying (8PSK), and 16 quadrature amplitude modulation (16QAM) modulation formats and analyzed the noise performance of the system. The results show that the structure can achieve all-optical matching of high-speed optical signals in BPSK, QPSK, 8PSK, and 16QAM modulation formats and has good anti-noise performance.

Broadband 1.5 GHz VECSEL-Based Laser System for High Speed Multicontrast Nonlinear Imaging

We demonstrate a 1.5 GHz broadband laser system based on a passively mode-locked Vertical-External-Cavity Surface-Emitting-Laser (VECSEL) for high speed nonlinear imaging. The 300 nm wide supercontinuum generated via photonic crystal fiber (PCF) coupled with pulse shaping by means of multiphoton intrapulse interference phase scan (MIIPS) allows us to procedurally filter out spectral windows of interest for nonlinear imaging applications as well as compress the resulting pulses to their transform-limited duration. The intrinsically high repetition rate our system is operating at matches the typical fluorescence lifetime of many biological samples, making it an ideal source for rapid nonlinear bio-imaging while mitigating the risks of photobleaching and photodamage.

0414 Pain in Your Day? Get Sleep Treatment Anyway! The Benefits of Behavioral Treatments for Insomnia Despite Pain Symptoms

Abstract Introduction Sleep-related problems and pain affect millions of U.S. adults. Sleep-focused interventions improve both sleep and pain-related outcomes. However, pain can be a barrier to insomnia care due to perceptions that insomnia treatment may not be as effective in the presence of ongoing pain. This study evaluated whether pain severity and pain interference in daily life moderate the effects of behavioral treatments for insomnia on sleep outcomes (e.g., insomnia symptoms, perceived sleep quality, sleep effort, daytime sleepiness). Methods Secondary data analysis was conducted on a sample of 149 women veterans with insomnia disorder who completed either Cognitive Behavior Therapy for insomnia (CBT-I) or Acceptance and Behavioral Changes to treat Insomnia (ABC-I) treatment, both of which showed overall benefit in treating insomnia in women veterans. In the original study, sleep outcomes (ISI, PSQI, GSES, ESS), pain factors (BPI), and other outcomes were measured at baseline, posttreatment, and at 3-months follow-up. Linear and quadratic mixed effects models with random intercepts (subject-level) were conducted to examine the influence of treatment phase, pain-related severity and interference, and their interaction on sleep outcomes. Results All models were statistically significant (92.13≤Χ2≤519.55). No significant interactions were present between treatment phase and pain severity or interference in relation to sleep outcomes. Across analyses, treatment phase, both from baseline to posttreatment (-2.22≤b≤-8.31, p<.001) and from baseline to 3-month follow-up (-2.67≤b≤-8.17, p<.001), illustrated significant improvement of sleep quality outcomes. Conclusion Neither pain severity nor pain interference had a significant impact on outcomes of behavioral treatments for insomnia in women veterans. Findings have clinical implications in that they support the encouragement of individuals with co-morbid chronic pain and insomnia symptoms to engage in non-pharmacological interventions for insomnia disorder. Future research could expand on this study by including pain-related interventions concurrent with behavioral interventions for insomnia disorder. Support (if any) Data used was from an original project funded by VA/HSR&D IIR-HX002300 (PI: Martin), NIH/NHLBI K24HL143055 (PI: Martin). Dr. Erickson was supported by the VA Office of Academic Affiliations through the Advanced Fellowship Program in Geriatrics. Support was also provided by the VA Greater Los Angeles Geriatric Research, Education and Clinical Center.

Multifunctional Metasurfaces Enabled by Multifold Geometric Phase Interference.

Geometric phase is frequently used in artificially designed metasurfaces; it is typically used only once in reported works, leading to conjugate responses of two spins. Supercells containing multiple nanoantennas can break this limitation by introducing more degrees of freedom to generate new modulation capabilities. Here, we provide a method for constructing supercells for geometric phases using triple rotations, each of which achieves a specific modulation function. The physical meaning of each rotation is revealed by stepwise superposition. Based on this idea, spin-selective holography, nanoprinting, and their hybrid displays are demonstrated. As a typical application, we have designed a metalens that enables spin-selective transmission, allowing for high-quality imaging with only one spin state, which can serve as a plug-and-play chiral detection device. Finally, we analyzed how the size of supercells and the phase distribution inside it can affect the higher order diffraction, which may help in designing supercells for different scenarios.

Inverse design of a broadband tunable terahertz metasurface absorber

A tunable terahertz vanadium dioxide (VO2) metasurface absorber based on inverse design is proposed and demonstrated numerically. The inverse design is a novel design method by which the optical structure found is based on the desired functional properties, significantly improving the design efficiency of optical structures. The metasurface absorber accomplishes more than 90% absorption between 2.88 and 7.15 THz. Peak absorption intensity may be dynamically changed between 4% and 96% as VO2 conductivity is changed between 200 S/m and 2 × 105 S/m. The physical mechanism is discussed by interference phase extinction, the theory of impedance matching and field distributions. The suggested absorber can be used for energy harvesting and terahertz filtering.

Temporal interference current stimulation in peripheral nerves is not driven by envelope extraction

Background. Electrical neuromodulation remains an effective therapy for multiple neurological disorders. One strategy to electrically stimulate nerves utilizes the interference of multiple high frequency waveforms. This technique, known as temporal interference stimulation or interferential current stimulation, has recently gained significant attention as a method to improve the state-of-the-art in neurostimulation in both animal studies and human clinical trials. Objective. Here we report our investigation into the fundamental properties of the neuronal response to these types of waveforms—the effects of carrier and envelope frequencies, thresholds, firing behavior, and phase and asymmetric interference patterns. Methods. We utilized a cuff electrode on the rat sciatic nerve to apply a variety of interferential signals. We recorded muscle activity in the plantar muscles and biceps femoris, which are proxies for activity on two of the major branches of the sciatic, which are spatially distinct in the target volume. We tested both fundamental recruitment properties as well as spatial techniques to selectively activate either muscle group. Results. Our data suggest, contrary to the currently accepted explanation, that neurons do not extract envelopes at all, and that the response to these signals is well explained by a resistor–capacitor (i.e. integrator) membrane with a fixed firing threshold. Basic interference techniques do not change recruitment far from electrodes. Techniques can produce regions of both phasic activation and tonic activation/conduction block. Conclusions. An integrator model suggests that interference techniques are less capable of minimally invasive stimulation for a subcortical brain target than previously thought. Human clinical trials using these techniques should reevaluate their methods. Interference stimulation allows significant target selectivity in a peripheral cuff electrode with targets near electrodes. These techniques can allow spatially distinct regions of phasic firing, tonic firing, conduction block, and no effect.

Имитационная программа для оценки влияния нелинейных фазовых искажений на показатели качества сигналов в оптическом тракте

The influence of nonlinear phase interference of self-phase modulation and phase cross-modulation arising in an optical fiber on multichannel, spectrally separated signals is considered. A simulation program has been created in the environment of the object-oriented programming language C#, which makes it possible to calculate the BER in the receiving part depending on the parameters of the optical path. The program has several degrees of freedom in the following parameters: transmission rate, used linear signal code, optical power level in individual channels, length and type of optical fiber. It is shown that in order to achieve the required BER, it is necessary to limit the optical power levels in the channel signals. The results of simulation of signal transmission over a distance of 100 km for the number of channels 40, 80 and 160 with channel rates of 10 Gbit/s and 40 Gbit/s in NRZ and RZ linear codes are presented.

Electronic frustration, Berry’s phase interference and slow dynamics in some tight-binding systems coupled to harmonic baths

Conical intersections in two-state systems require a coordinate-dependent coupling. This paper identifies and investigates conical intersections in cyclic tight-binding system-bath Hamiltonians with an odd number of sites and a constant site-to-site coupling. In the absence of bath degrees of freedom, such tight-binding systems with a positive coupling parameter exhibit electronic frustration and a doubly-degenerate ground state. When these systems interact with a harmonic bath, the degeneracy becomes a conical intersection between the adiabatic ground and first excited states. Under weak system-bath coupling, overlapping wavefunctions associated with different sites give rise to distinct pathways with interfering geometric phases, which lead to considerably slower transfer dynamics. The effect is most pronounced in the presence of low-temperature dissipative baths characterized by a continuous spectral density. It is found that the transfer dynamics and equilibration time of a cyclic dissipative three-site system with a positive coupling exceeds that of a similar three-site system with a negative coupling, as well as that of cyclic four-site systems, by an order of magnitude.

Modeling multi-loop atom interferometers with Co-moving Reference Theory

With the rapid development of atom interferometry, atom interferometers have been widely used in inertial navigation, resource exploration, basic physics and other fields. For precise measurement experiments with multi-loop atom interferometer configuration, it is urgent to establish a high-precision theoretical model charactering the relationship between target measurement quantities and measurement results. Based on this, we adopt the idea of co-moving reference frame, so as to transfer the gravity, gravity gradient and Earth’s rotation effects to the laser light field interacting with atoms by translating, rotating and stretching the background spacetime. With this method, we not only can simplify the analysis process of the experimental principle, but also give the analytical results of the high-order interference phase of the multi-loop atom interferometer containing the gravity gradient and Earth’s rotation. This work will lay a certain theoretical foundation for higher-precision experiment, and will also help to clearly guide the implementation of the experiment.

Low Reflection of Antenna with Wideband Reduced Backscattered Field Based on Phase Interference Technique

The approach of an asymmetrically designed checkerboard as a reflecting metasurface and the coding diffusive surface is proposed as a new way to minimize the antenna backscattered electromagnetic field level. At the resonant frequencies of three different metasurface units, zero degrees reflection phase is achieved. An active phase difference of 180° is maintained between three artificial magnetic conductors (AMCs) unit cells over a wide bandwidth of frequencies so that backscattered electromagnetic wave energy can be directed at different oblique angles using phase interference to reduce radar cross section. Comparatively, three AMC cells are arranged as an asymmetric chessboard along with an arbitrary phase distributed reflecting screen constructed using the random phase distribution technique. Further, compared with the reference antenna, the asymmetric chessboard has a greater reduction in backscattering. The proposed methodology is based on the backscattered field‐level cancellation and diffusion. The simulations demonstrate remarkable backscattered energy reduction from 4.9 to 18 GHz for the proposed antenna operating at 11 GHz in normal polarization (x‐ and y‐polarization). In addition, −10 dB backscattering reduction is achieved in the antenna working band (10.3–11.9 GHz), and different AMC units working at different frequencies exhibit the same radiation properties. Further, in/out‐of‐band bistatic reflected electromagnetic energy levels are significantly reduced. Similarly, the full‐wave simulation of the fabricated prototype confirms the measurement results.

Development and Validation of a High Performance Liquid Chromatography Ultraviolet Detection Method for the Quantitative Determination of Vancomycin Hydrochloride

Vancomycin hydrochloride is a tricyclic glycopeptide that contains amino acids and sugars. This substance is indicated to treat serious infections caused by Gram-positive bacteria by intravenous infusion. The objective of this study was to develop and validate an analytical methodology by high performance liquid chromatography with ultraviolet detection (HPLC-UV) to determine vancomycin hydrochloride content by assessing the parameters of selectivity, linearity, working range, matrix effect, robustness, precision, and accuracy. The sample used was vancomycin hydrochloride in a vial and analyzes were carried out on HPLC-UV system, with C18 reverse-phase column at 30 °C, pH=4 and diode-array detection (220 nm). The mobile phase was composed of acetonitrile and monobasic ammonium phosphate buffer (8:92 v/v), 1 mL min-1 flow, injection volume of 20 μL and 15 minute of run time. The method has been shown to be selective, free from mobile phase interference, diluent and other substances on vancomycin hydrochloride retention time; the method is linear in the range between 25 and 175 µg mL-1; matrix effect showed parallelism between the lines, thus indicating the absence of interference of the matrix constituents in analysis of the compound of interest; the method was robust with drug variations proportional to the deliberate changes caused by the change in the flow rate of the mobile phase and in the column temperature; the method showed accuracy at 25, 50, and 75 µg mL-1 concentrations, showing satisfactory recovery rate after addition of the standard. The analytical methodology described proved to be simple, fast, safe and was considered valid.

Optimum design of acoustic stealth shape of underwater vehicle model with conning tower

We present an optimization algorithm for achieving optimal acoustic stealth performance during designing an underwater vehicle shape in the free field using COMSOL-MATLAB integrated software. A component superposition method based on phase interference is adopted to simplify and decompose a nonaxisymmetric complex underwater vehicle model into two main parts: the hull and the conning tower. The shape of underwater vehicle hull is described mathematically with a sequence of undetermined coefficients for optimization. The basic mathematical principle of the proposed method is Kirchhoff approximation, also called planar element method (PEM). Additionally, some examples and experimental results show that this method can realize the automatic optimization design of acoustic stealth shapes for underwater vehicle model in a given frequency band and acoustic incident angle range. The underwater vehicle design has a smooth appearance with low target strength (TS) or angle detection rate for most detection angles and frequency bands after optimized.

Motion Error Estimation and Compensation of Airborne Array Flexible SAR Based on Multi-Channel Interferometric Phase

Airborne array synthetic aperture radar (SAR) has made a significant breakthrough in the three-dimensional resolution of traditional SAR. In the airborne array SAR 3D imaging technology, the baseline length is the main factor restricting the resolution. Airborne array flexible SAR can increase the baseline length to improve the resolution and interference performance by mounting antennae on the wing. The existing research lacks results obtained using flexible actual data processing and specific motion compensation methods. Thus, this paper proposes a motion error estimation and compensation method for an airborne array flexible SAR based on a multi-channel interferometric phase. Firstly, a flexible channel motion compensation model is established based on the multi-channel interference phase of airborne array flexible SAR. Then, based on the rigid multi-channel data, combined with the ground control points, the least square method, and the global optimal search algorithm, the accurate rigid baseline length and the central incidence angle are obtained. Finally, according to the multi-channel interference phase inversion of the flexible motion error and combined with the motion compensation model, the flexible data are compensated in the time domain. The actual results indicate that, compared with traditional motion compensation methods, our method can obtain accurate flexible compensation data. This study improves the interference performance of multi-channel data of airborne array flexible SAR and lays a solid foundation for the high-precision 3D reconstruction of airborne array flexible SAR.

Photonic shielding in giant resonator system

<sec>In the traditional quantum optics and waveguide quantum electrodynamics, atom is usually considered as a point like dipole. However, the successful coupling between a superconducting transmon and surface acoustic wave gives birth to a giant atom, which interacts with the waveguide via more than two points. In the giant atom setup, the dipole approximation breaks down the nonlocal light-matter interaction, it brings lots of unconventional quantum effects, which are presented by the phase interference. As a simplification, the giant resonator, which supports equal energy interval, can be regarded as a linear version of the giant atom. Like the giant atom system, the giant resonator is also coupled to the resonator array waveguide via two sites.</sec> <sec>According to the quantum interference effect, we study the phase control in giant resonator and the cavities in the waveguide. For a coupled three-resonator system, we reveal the characteristics of the steady state via the Heisenberg-Langevin equations when the driving and dissipation are both present. In such a system, the steady state can be coherently controlled by adjusting the phase difference <inline-formula><tex-math id="M2">\begin{document}$\phi$\end{document}</tex-math><alternatives><graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="9-20230049_M2.jpg"/><graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="9-20230049_M2.png"/></alternatives></inline-formula> between the two classical driving fields. We analytically give the existence condition of dark cavity. The results show that only when the middle cavity and the giant resonator are both ideal, can one realize the flash and shielding. Furthermore, we generalize the above study in three resonator system to the multiple cavity system to investigate the photonic flash and shielding. We find that when the number of the middle resonators is <inline-formula><tex-math id="M3">\begin{document}$4n+1\, (n\in {Z})$\end{document}</tex-math><alternatives><graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="9-20230049_M3.jpg"/><graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="9-20230049_M3.png"/></alternatives></inline-formula>, the bidirectional photonic shielding occurs, that is, the giant resonator can shield the middle resonators in the waveguide and vice versa. On the contrary, when there are <inline-formula><tex-math id="M4">\begin{document}$4n+3$\end{document}</tex-math><alternatives><graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="9-20230049_M4.jpg"/><graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="9-20230049_M4.png"/></alternatives></inline-formula> middle resonators in the giant resonator regime, only the directional photonic shielding happens, that is, the giant resonator can shield the waveguide, but the waveguide cannot shield the giant resonator.</sec> <sec>The above interesting photonic flash and shielding comes from the quantum interference effect. That is, the driving field injects the photons into the waveguide, and the photons propagate in different directions. In the overlapped regime, the photon carrying different phase undergoes destructive interference and acts as a dark resonator. We hope that the interference based photonic control scheme can be applied to the field of quantum device designing.</sec>

Optimization and control of cold atom interference phase shift based on laser double-sideband suppression

Using the electro-optical modulation method to generate Raman beams for cold atom interference is one of the better methods for constructing a more compact and robust laser system. But this way will generate some residual sidebands resulting in the additional interference phase shift, which can affect the measurement accuracy of cold atom interferometer. In order to weaken the effect of laser modulation sidebands on the phase shift of cold atom interference, a double-sideband suppressed-carrier modulation laser system for cold atom interference is constructed. Based on the designed laser system, the principle of double-sideband generation and suppression is analyzed in detail, and some residual sidebands are adjusted and controlled. Moreover, some important optical parameters that affect the phase shift of cold atomic interference, such as the initial distance between the Raman retro-reflection mirror and the atomic cloud, the interrogation time between two adjacent Raman pulses, the laser modulation depth and the initial velocity of the atomic cloud, are discussed and optimized. By optimizing these relevant parameters, the influence of residual modulation sidebands on the phase shift of cold atomic interference is weakened drastically. The research results indicate, making use of the method of double-sideband suppression, the phase shift of cold atomic interference can be optimized to 0.7 mrad when the initial distance between the Raman retro-reflection mirror and the atomic cloud is 105 mm, and the interrogation time between two adjacent Raman pulses is 82 ms. More importantly, this work can provide a method for weakening the influence of Raman sideband effect on the phase shift of cold atom interferometer, and the corresponding laser system can be applied to other inertial sensors such as atomic gravimeter or atomic gravity gradiometer.