Abstract
Proposed herein is an alternative photonic scheme for the generation of a doublet UWB pulse, which is based on the nonlinear polarization rotation of an elliptically polarized probe beam. The proposed scheme is a modified optical-fiber Kerr shutter that uses an elliptically polarized probe beam together with a linearly polarized control beam. Through theoretical analysis, it was shown that the optical-fiber-based Kerr shutter is capable of producing an ideal transfer function for the successful conversion of input Gaussian pulses into doublet pulses under special elliptical polarization states of the probe beam. An experimental verification was subsequently carried out to verify the working principle. Finally, the system performance of the generated UWB doublet pulses was assessed by propagating them over a 25-km-long standard single-mode fiber link, followed by wireless transmission. Error-free transmission was successfully achieved.
Highlights
Ultrawideband (UWB) radio technology has been receiving much attention of late as a highly promising solution for future high-capacity wireless personal-area networks (PANs) due to its various benefits, such as low power consumption, high data capacity, and multipath fading immunity [1]
The impulse radio UWB (IR-UWB) technology can provide a variety of technical advantages, such as reduced multipath fading, broad bandwidth, and increased operational security, it has the fundamental limitation of low spectral-power density, which allows it to cover only a short signal transmission distance of less than tens of meters
Demonstrated was an all-optical UWB doublet pulse generation scheme based on an optical-fiber Kerr shutter, using the combination of an elliptically polarized CW probe beam and a linearly polarized control pulse beam
Summary
Ultrawideband (UWB) radio technology has been receiving much attention of late as a highly promising solution for future high-capacity wireless personal-area networks (PANs) due to its various benefits, such as low power consumption, high data capacity, and multipath fading immunity [1]. The conventional optical-fiber-based Kerr shutters, which use both linearly polarized control and probe beams, have been widely used for nonlinear signal processing, such as data demultiplexing in high-speed optical-time-domain-multiplexing (OTDM) systems [16], wavelength conversion [17], and logic gates [18]. It should be noted that most of the all-optical UWB pulse generation schemes were based on the simultaneous generation of multiple Gaussian pulses with opposite polarities followed by the time-delayed temporal overlap [7,11,12,13] In these schemes the multiple Gaussian pulses must have different operating wavelengths; otherwise, the temporal overlap induces significant coherent noise at the output signal. Such UWB optical pulses suffer from optical fiber dispersion-induced transmission distance limitation. The optical doublet pulses produced from our proposed scheme does not suffer from the fiber dispersion-induced limitation, since it is a single wavelength signal
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
