Self-seeded Fabry-Perot Laser Diode Research Articles

Stable wavelength-tuning laser in single-frequency by optical-injected Fabry-Perot laser diode and RSOA for long fiber distance propagation

In this demonstration, we propose and experimentally investigate a stable wavelength-tuning laser configuration by using self-seeded Fabry-Perot laser diode (FP-LD) and external-injected reflective semi-conductor optical amplifier (RSOA). Here, this proposed laser can be tuned in the wavelength range of 1534.05 to 1553.00 nm with a 1.1 nm tuning-step. And the output powers and side-mode suppression ratios (SMSRs) are measured at −5.3 to 4.6 dBm and 31.2 to 50.1 dB/0.05 nm, respectively. And, the proposed laser also can be directly modulated at 2.5 Gb/s on-off keying (OOK) modulation format and propagates 75 km single-mode fiber (SMF) with no optical amplifier and dispersion compensation.

Wavelength switching of picosecond pulses generated from a self-seeded Fabry–Perot laser diode with a tilted fiber Bragg grating formed in a graded-index multimode fiber

We demonstrated the generation of wavelength-switchable picosecond pulses from a self-seeded Fabry-Perot laser diode that used a tilted fiber Bragg grating (FBG) formed in a graded-index multimode fiber as an external optical feedback element, where wavelength switching was achieved by controlling the modal distribution in the FBG. We measured the reflection spectra of multimode FBGs fabricated with different tilt angles and discussed the effects of the tilt angle on wavelength selection. By using a 20 mm long 1.65° tilted FBG and a fiber deformer to control the modal distribution in the FBG, we generated 2 GHz pulses with a wavelength switchable over 14 wavelengths at a spacing of ∼0.8 nm.

基于自注入式法布里—珀罗激光二极管与倾斜多模光纤光栅的多波长可调谐短脉冲激光器

基于自注入式法布里—珀罗激光二极管与倾斜多模光纤光栅的多波长可调谐短脉冲激光器

Generation of tunable multi-wavelength optical short pulses using self-seeded Fabry-Perot laser diode and tilted multimode fiber Bragg grating

Generation of tunable multi-wavelength optical short pulses using self-seeded Fabry-Perot laser diode and tilted multimode fiber Bragg grating

High Side-Mode Suppression Ratio Optical Pulses Generated From a Self-Seeded Fabry–Perot Laser Diode Locked by a Linear Erbium-Doped Fiber Laser

A new configuration of self-seeding scheme has been developed for wavelength-tunable optical pulse generation. In the system, an erbium-doped fiber laser is used to provide a strong wavelength seeding power and as a result, an extremely high side- mode suppression ratio of larger than 50 dB over the whole wavelength-tuning range of 13 nm can be obtained, with good pulse stability. When compared with other erbium-doped fiber amplifier configurations reported previously, the developed system exhibits higher pump efficiency and signal amplification capability. The system is simple, robust, and of low cost.

Cost-effective tunable fiber laser based on self-seeded Fabry-Perot laser diode using a Sagnac loop reflector

We propose and demonstrate a simple configuration of wavelength-tunable fiber laser made up of a tunable band-pass filter, a Sagnac loop reflector, and a Fabry-Perot laser diode. Based on the self-seeded operation, the proposed fiber laser can obtain a single-longitudinal-mode output in the wavelength tuning range of 1544.69-1563.39 nm with tuning step of 1.34 nm. The performances of output power (>-9 dBm), optical side-mode suppression ratio (> 65.5 dB), and power and wavelength stabilities are well exhibited.

Fiber-Bragg-grating cavity sensor interrogated with a self-seeded fabry-Perot laser diode

We propose a low-cost general-purpose fiber Bragg grating (FBG) cavity sensing technique, where short pulses generated from a self-seeded Fabry-Perot laser diode are used to interrogate a fiber cavity formed with two chirped FBGs and the optical loss in the cavity is determined from the power ratio of the first two pulses reflected from the cavity. This technique does not require intensity referencing and the measurement is insensitive to drifts in the center wavelengths of the FBGs. We demonstrate this technique experimentally with a long-period fiber grating placed in the fiber cavity as a refractive-index sensor

Correction to "EDFA-Free All-Optical 2R Regeneration Using a Compact Self-Seeded Fabry–PÉrot Laser Diode"

This study presents an erbium-doped fiber amplifier (EDFA)-free all-optical 2R (reamplification and reshaping) regeneration scheme based on a compact self-seeded Fabry-Perot laser diode. The proposed 2R regenerator achieves a straight line transmission at 10 Gb/s over 76 km without either the EDFA or the external probe laser, both of which are traditionally re- quired. Additionally, device characteristics such as data-rate transparency, input dynamic range, amplified gain, and 2R regen- eration performance are investigated experimentally. Index Terms—Fabry-Perot (FP), reamplification and reshaping (2R) regeneration.

Interrogation of fiber Bragg grating displacement/bending sensors using dual-wavelength pulses generated from a self-seeded Fabry-Perot laser diode

We demonstrate a simple technique for the interrogation of fiber Bragg grating (FBG) displacement/bending sensors using a self-seeded Fabry-Perot laser diode (FP-LD). The sensing element consists of two almost identical FBGs mounted on the surface of a cantilever beam, which results in a reflection spectrum containing two close peaks with a separation depending on the amount of bending of the beam. The sensing element is made to select a particular mode of a gain-switched FP-LD, so that stable short pulses at the two wavelengths defined by the reflection peaks of the FBGs are generated simultaneously when the modulating frequency of the FP-LD is set properly. The wavelength separation of the dual-wavelength pulses is converted into a time difference by transmitting the pulses through a dispersive fiber, so that the wavelength measurement is replaced by the less expensive time measurement. To multiplex similar sensors that are sufficiently far apart spectrally, it is only necessary to change the modulating frequency of the FP-LD. This technique provides an intensity-referencing-free demodulation scheme, an easy way to interrogate a series of sensors, and an effective means to compensate for drifts due to temperature changes.

Generation of picosecond pulses at five close wavelengths by use of a self-seeded Fabry–Perot laser diode and a spectrum-split fiber Bragg grating

We have demonstrated simultaneous generation of stable picosecond laser pulses at five close wavelengths at a pulse repetition rate of approximately 2 GHz by using a self-seeding configuration that consisted of a gain-switched Fabry-Perot laser diode (FPLD) with an external cavity formed by a tunable spectrum-split fiber Bragg grating (FBG). The FBG selected only one of the modes of the FPLD and, at the same time, filtered the selected FPLD mode such that the reflection from the FBG, tapped with a directional coupler, provided an output of dual-wavelength pulses and the transmission through the FBG provided an output of three-wavelength pulses. We could change the intensities and the wavelength separations of the pulses by adjusting the modulating radio frequency and the temperature of the FPLD and the separation of the FBG reflection peaks. In our experiments the highest side-mode suppression ratios of the pulses obtained were 44.5 dB for the dual-wavelength output and 25.0 dB for the three-wavelength output. Also, the laser was demonstrated to minimize pulse intensity imbalance and produce equally separated wavelengths (with a wavelength separation of 0.2 nm). This simple laser offers considerable flexibility for various applications.

Generation of Dual-Wavelength Picosecond Pulses From a Self-Seeded Fabry–PÉrot Laser Diode and a Polarization-Maintaining Fiber Bragg Grating

We demonstrate a technique of generating dual-wavelength picosecond pulses with a self-seeded Fabry-Perot laser diode, where the two lasing wavelengths are selected from the same mode of the laser diode by the spectrally separated orthogonally polarized reflection peaks of a polarization-maintaining fiber Bragg grating. Using this technique, we generated stable dual-wavelength pulses that had a pulsewidth of 59.0-63.3 ps, a wavelength separation of 0.53 nm, and a pulse rate of about 2 GHz. We were also able to achieve simultaneous lasing at the two wavelengths with equal pulse intensities and effective switching between the two wavelengths by simply adjusting the polarization controller placed in the laser cavity.

Multiplexing of Temperature-Compensated Fiber-Bragg-Grating Magnetostrictive Sensors With a Dual-Wavelength Pulse Laser

We present a simple technique for the multiplexing of fiber-Bragg-grating (FBG) magnetostrictive sensors using a recently demonstrated principle for the generation of dual-wavelength laser pulses. Each sensor consists of an FBG bonded on two joined pieces of metal alloys, which have almost identical thermal expansion coefficients and significantly different magnetostriction coefficients. When a magnetic field is applied along the sensor, the reflection spectrum of the FBG is split into two close peaks, whose separation is insensitive to the temperature of the sensor. By using the FBG as a wavelength-selective element for a gain-switched self-seeded Fabry-Perot laser diode, stable short pulses at the two reflected wavelengths of the FBG are generated simultaneously from one of the modes of the laser diode, when the radio frequency (RF) of the laser diode is set properly. By transmitting the pulses through a dispersive fiber, the wavelength separation of the pulses at the two wavelengths is converted into a time difference, which provides a measure of the wavelength separation and, hence, the applied magnetic field (or electric current). Interrogation of a series of sensors is achieved by changing the driving RF of the laser diode.

Generation of dual-wavelength picosecond pulses with close wavelength separation from a self-seeded Fabry-Perot laser diode

We present a simple and low-cost technique for the generation of dual-wavelength picosecond laser pulses with a close wavelength separation. The technique is based on the selection of two close wavelengths from one of the modes of a self-seeded Fabry-Perot laser diode (FP-LD) with a fiber Bragg grating (FBG) that has a slightly split reflection spectrum. With this technique, the intensities of the pulses at the two wavelengths can be equalized by adjusting the temperature of the FP-LD, and the wavelength separation can be changed continuously without changing the repetition rate of the output pulses by tuning the separation of the reflection peaks of the FBG. Generation of stable dual-wavelength pulses with a pulsewidth of 36.0-50.0 ps and a tunable wavelength separation from 0.21 to 0.44 nm at a pulse rate of 2 GHz was demonstrated.

A tunable dual-wavelength erbium-doped fiber ring laser using a self-seeded Fabry-Perot laser diode

A tunable dual-wavelength erbium-doped fiber ring laser using a self-seeded Fabry-Perot laser diode (FP-LD) is proposed and demonstrated. By adding an FP-LD incorporated with a tunable bandpass filter within the ring cavity, the fiber laser can lase two wavelengths simultaneously because of the self-seeded mechanism. This dual-wavelength output exhibits a good performance having the optical side-mode suppression ratio over 31 dB. The wavelength-tuning range of this tunable dual-wavelength fiber laser can be up to 9 nm.

A tunable‐output wavelength converter based on a self‐seeded Fabry‐Perot laser diode with a chirped fiber grating

AbstractWe report a new all‐optical wavelength conversion scheme based on a self‐seeded Fabry–Perot laser diode with a chirped fiber grating as the external cavity. This converter can convert the wavelength of input optical signals into 14 discrete wavelengths with external RF modulation. We successfully demonstrate all‐optical wavelength conversion at 10 Mbps. © 2003 Wiley Periodicals, Inc. Microwave Opt Technol Lett 37: 35–36, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10817

Differential absorption measurement by use of self-seeded gain-switched Fabry-Perot laser diode

Differential absorption measurement for acetylene has been carried out by the use of a self-seeded, gain-switched Fabry-Perot (FP) laser diode. During the measurement, the two wavelengths from the laser output can be conveniently selected by switching the repetition frequency. The system has flexible wavelength tunability, larger sensitivity than those based on DFBs, and high potential for multi-point, multiple gas sensing.

Fast wavelength tuning of a self-seeded Fabry-Perot laser diode with a Fabry-Perot semiconductor filter

In this letter, we describe a new and simple method for achieving fast wide-range wavelength tuning in a self-seeded Fabry-Perot laser diode (FPLD). The method relies on the provision of optical feedback to a self-seeded laser diode from a Fabry-Perot semiconductor filter (FPSF). Wavelength selection is realized by electrically tuning the comb-like spectral response of the FPSE Using an ordinary FPLD biased below its threshold as an FPSF, we have demonstrated stepwise wavelength tuning over a range of 9.0 nm with a sidemode suppression ratio higher than 15 dB throughout the range, and a pulse buildup time as short as a few microseconds.

Electrically wavelength-tunable picosecond pulses generated from a self-seeded laser diode using a compensated dispersion-tuning approach

We developed a compensated dispersion-tuning approach to generate electrically wavelength-tunable short pulses from a self-seeded Fabry-Perot laser diode. Single-mode pulses with a sidemode-suppression ratio over 30 dB are obtained across most of the 18.5-nm tuning range in the fiber configuration. The use of both dispersion-compensating fiber and standard single-mode fiber with equal and opposite group velocity dispersion allows electrical tuning to be performed at a constant repetition rate.

Multiwavelength picosecond pulses generated from a self-seeded Fabry-Perot laser diode with a fiber external cavity using fiber Bragg gratings

A novel scheme for generating multiwavelength short pulses using fiber Bragg gratings (FBGs) was demonstrated. In this scheme the external cavity length for all wavelengths selected by the gratings is intrinsically identical and the FBGs can be cascaded into the external cavity. Simultaneous generation of 1-GHz dual-wavelength short pulses with a wavelength separation of 1.6 or 18 nm was demonstrated. A sidemode suppression ratio (SMSR) better than 30 or 25 dB was achieved at both wavelengths in the former and latter cases respectively. Three-wavelength 1-GHz ps pulses with a SMSR better than 25 dB at all three wavelengths were also successfully generated.