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Double chirped Fourier domain mode-locked photoelectric oscillator and application thereof and communication system

A technology of Fourier domain mode-locking and photoelectric oscillators, which is applied in the field of microwave photonics, can solve the problems of low center frequency and bandwidth of chirp signals, and limited speed of electronic devices, so as to improve detection accuracy and communication quality, and improve The effect of communication quality

Inactive Publication Date: 2019-08-16
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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Problems solved by technology

[0003] Traditional chirped microwave signals are often generated by electronic means, but limited by the speed of electronic devices, the center frequency and bandwidth of the generated chirped signal are low, usually on the order of GHz

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  • Double chirped Fourier domain mode-locked photoelectric oscillator and application thereof and communication system
  • Double chirped Fourier domain mode-locked photoelectric oscillator and application thereof and communication system
  • Double chirped Fourier domain mode-locked photoelectric oscillator and application thereof and communication system

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Embodiment Construction

[0028] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0029] The invention discloses a double-chirped Fourier domain mode-locked photoelectric oscillator, which utilizes the laser generation characteristics of a laser light source, the modulation characteristics of a modulator, the filtering characteristics of an optical filter, the photoelectric conversion characteristics of a photodetector and the photoelectric The microwave generation performance of the oscillator generates broadband adjustable double-chirped microwave signals.

[0030] see Figure 1-5 As shown, according to some embodiments of the present invention, a dual-chirped Fourier domain mode-locked optoelectronic oscillator is provided, including: two lasers, an optical coupler 2, a modulator, an optical filter,...

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Abstract

The invention relates to a double chirped Fourier domain mode-locked photoelectric oscillator and an application thereof and a communication system, which relate to the technical field of microwave photonics. The double chirped Fourier domain mode-locked photoelectric oscillator comprises two lasers, an optical coupler, a modulator, an optical filter, an optical delay line, a photoelectric detector, a power divider and an electric amplifier. The two lasers, the modulator, the optical fiber and the photoelectric detector constitute a double-pass-band sweep-frequency microwave photonic filter, of which the sweep frequency is realized by the sweep frequency of the two lasers or is realized by the sweep frequency of the optical filter. The double chirped Fourier domain mode-locked photoelectric oscillator provided by the invention does not need a high-speed electronic device. The output signals can be tuned. Broadband fast chirped microwave signals can be output.

Description

technical field [0001] The invention relates to the technical field of microwave photonics, in particular to a double-chirped Fourier domain mode-locked photoelectric oscillator and an application and communication system. Background technique [0002] In modern radar systems, by transmitting chirped microwave signals with a large time-bandwidth product, supplemented by pulse compression, higher accuracy can be achieved without sacrificing detection range. Chirp signal is a kind of broadband chirp signal commonly used in radar system. However, the ambiguity function of chirp signal has sharp edges, so it has a strong range-Doppler coupling effect, which makes the range measurement value of radar to target Deviations related to speed occur. This problem can be solved by using a double-chirped broadband microwave signal. The dual-chirp signal contains two complementary up-chirp and down-chirp components in one period, and the range-Doppler coupling effect can be corrected ac...

Claims

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Application Information

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IPC IPC(8): H01S1/02
CPCH01S1/02
Inventor 李明郝腾飞唐健石暖暖李伟祝宁华
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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