Multi-band double-chirp microwave signal generation and anti-optical fiber dispersion transmission system and method

A microwave signal and fiber dispersion technology, applied in the field of microwave photonics, can solve problems such as limited application scenarios and periodic power fading, and achieve the effect of wide application prospects, overcoming technical defects, and overcoming the phenomenon of periodic power fading.

Active Publication Date: 2020-12-29
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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Problems solved by technology

The optical generation methods of double-chirp signals are mostly based on double-sideband modulation, which will encount

Method used

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  • Multi-band double-chirp microwave signal generation and anti-optical fiber dispersion transmission system and method
  • Multi-band double-chirp microwave signal generation and anti-optical fiber dispersion transmission system and method
  • Multi-band double-chirp microwave signal generation and anti-optical fiber dispersion transmission system and method

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Embodiment Construction

[0028] The invention discloses a multi-band dual-chirp microwave signal generation and anti-fiber dispersion transmission system, including a light source, a microwave source, a 90° electric coupler, a waveform generator, a three-channel DC voltage source, a Mach-Zehnder modulator, a doped Erbium fiber amplifiers, single-mode fibers, polarization controllers, polarizers and photodetectors, wherein,

[0029] Mach-Zehnder modulator, its optical input end is connected with the output end of the light source, the radio frequency signal input end RF1 is connected with an output end ① of the 90° electric coupler, and the radio frequency signal input end RF2 is connected with the 90° electric coupler The other output terminal ② of the coupler is connected, the DC bias voltage input port a is connected to the output port a of the first three-channel DC voltage source, and the DC bias voltage input port b is connected to the output port b of the first three-channel DC voltage source co...

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Abstract

A multi-band double-chirp microwave signal generation and anti-optical fiber dispersion transmission system comprises a light source, a microwave source, a 90-degree electric coupler, a waveform generator, a three-channel direct-current voltage source, a Mach-Zehnder modulator, an erbium-doped optical fiber amplifier, a single-mode optical fiber, a polarization controller, a polarizer and a photoelectric detector. According to the invention, + 1, -3-order single sideband modulation of single-frequency carrier modulation and +/-2-order double sideband modulation of low-frequency single chirp signal modulation in two vertical polarization states are realized by using the double-parallel double-polarization Mach-Zehnder modulator, the polarization state of the signal is adjusted by the polarization controller after optical fiber transmission, and the polarization state is synthesized by the polaroid. And finally, detection is carried out by a photoelectric detector to realize double-frequency-band quadruple-bandwidth double-chirp microwave signal generation and anti-optical-fiber dispersion transmission.

Description

technical field [0001] The invention relates to the technical field of microwave photonics, in particular to a system and method for generating multi-band double-chirped microwave signals and anti-fiber dispersion transmission. Background technique [0002] Frequency chirping is an important method to improve signal pulse compression ratio. Single-chirp microwave signals are often used as radar waveforms. However, their ambiguity functions are knife-edge, which will cause large range-Doppler coupling and reduce the range-Doppler resolution and detection accuracy of radar systems. Therefore, Dual-chirped microwave signals are increasingly being used in radar systems to increase the range-Doppler resolution of the system. [0003] Usually, the double-chirped microwave signal is generated by an electrical method, which is limited by problems such as electronic bottlenecks. The center frequency of the generated double-chirped signal is low and the bandwidth is also narrow. Tha...

Claims

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Application Information

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IPC IPC(8): H04B10/2513H04B10/25H04B10/516
CPCH04B10/25137H04B10/516H04B10/5165
Inventor 朱厦孙文惠李伟王欣李明祝宁华
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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