All-optical multichannel/multiband linear frequency modulation signal optical generation method with good reconfigurability
A linear frequency modulation signal and reconfigurable technology, applied in optical communication and microwave fields, can solve the problems of poor practical feasibility of the system, achieve good reconfigurability, compact structure, and expand the application range
Pending Publication Date: 2022-04-22
XIDIAN UNIV
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[0004] Most of the currently reported schemes for generating chirp signals from photons can only generate single-band dual-chirp signals; some can generate multi-band dual-chirp signals, but due to the high power required for high-order optical sidebands, the system less practical
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[0027] Below in conjunction with accompanying drawing the embodiment of the present invention is described in detail: present embodiment implements under the premise of technical scheme of the present invention, has provided detailed implementation mode and concrete operation process, but protection scope of the present invention is not limited to subordinate the embodiment.
[0028] figure 1It is an optical generation method of all-optical multi-channel / multi-band chirp signal with good reconfigurability, including laser LD, arbitrary waveform generator AWG, dual polarization quadrature phase shift keying modulator DP-QPSK, doped Erbium fiber amplifier EDFA, optical coupler OC, polarization controller PC, polarization beam splitter PBS and balanced photodiode BPD, in which DP-QPSK is composed of Y-type optical splitter and two parallel Mach-Zehnder modulators X-QPSK It is integrated with Y-QPSK, 90° polarization rotator 90°PR and polarization beam combiner PBC; it is charact...
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The invention provides an optical generation method of an all-optical multichannel / multiband linear frequency modulation signal with good reconfigurability. The method relates to the technical field of microwaves and the technical field of optical communication. The method is shown in a figure 1 in the specification, and comprises a laser LD, an arbitrary waveform generator AWG, a dual-polarization quadrature phase shift keying modulator DP-QPSK, an erbium-doped fiber amplifier EDFA, an optical coupler OC, a polarization controller PC, a polarization beam splitter PBS and a balanced photodiode BPD. After DP-QPSK is modulated by two local oscillator signals and an AWG signal, an orthogonal polarization multiplexing signal is generated by setting a correct bias point. The PC is adjusted to introduce different phase shifts, the signals are divided into two paths of signals through the PBS, and signals of different frequency bands can be obtained after the signals are injected into the PD. The method provided by the invention is compact in structure, good in reconfiguration and large in frequency adjustable range, and can be used for a distributed radar system and a multiband radar system.
Description
technical field [0001] The invention relates to the technical field of optical communication and microwave technology, and mainly relates to the generation of multi-band chirp signals by using photonics technology. Background technique [0002] In order to improve the detection sensitivity and anti-reconnaissance ability of modern radar systems, it is necessary to generate pulse compression signals with high carrier frequency, wide bandwidth, multi-band, and large time-bandwidth product. The photon-assisted pulse compression signal generation method has the advantages of large operating bandwidth, low loss, and strong immunity to electromagnetic interference, making it a promising candidate for modern radar systems. As a typical pulse compression signal, chirp signal is widely used in radar detection with large detection range and high range resolution due to its good pulse compression capability. Dual-chirped chirp waveforms, which are less sensitive to Doppler shift, have...
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IPC IPC(8): H04B10/556H04B10/516H04J14/06
CPCH04B10/5561H04J14/06H04B10/516
Inventor 童昱博文爱军李圆圆
Owner XIDIAN UNIV