Photoelectricity oscillator based on narrow-band double-peak phase shift fiber bragg grating and method thereof

Abstract

The invention discloses a photoelectricity oscillator based on narrow-band double-peak phase shift fiber bragg grating and a method thereof. The photoelectricity oscillator based on the narrow-band double-peak phase shift fiber bragg grating and the method thereof comprise a wavelength tunable laser, a polarization controller, a single-arm Mach-Zehnder modulator, an erbium-doped fiber amplifier, the narrow-band double-peak phase shift fiber bragg grating, a high-speed photoelectric detector, a microwave amplifier and a microwave coupler. The wavelength tunable laser, the polarization controller, the single-arm Mach-Zehnder modulator, the erbium-doped fiber amplifier, the narrow-band double-peak phase shift fiber bragg grating and the high-speed photoelectric detector are sequentially connected through optical fibers. The high-speed photoelectric detector, the microwave amplifier, the microwave coupler and a radio frequency input end of the single-arm Mach-Zehnder modulator are sequentially connected through microwave coaxial lines. An output port of the microwave coupler is a microwave signal output end. According to the photoelectricity oscillator based on the narrow-band double-peak phase shift fiber bragg grating and the method thereof, long optical fibers and a high Q value high pass microwave filter needed in a traditional photoelectricity oscillator to improve signal Q values and purity of frequency spectrum are avoided. Meanwhile, the photoelectricity oscillator based on the narrow-band double-peak phase shift fiber bragg grating and the method thereof have the advantages of being simple and compact in structure, easy to integrate and the like.

Description

technical field [0001] The invention relates to the field of microwave photons and the field of optical communication where microwave / millimeter wave signals are generated, in particular to a photoelectric oscillator based on a narrow-band bimodal phase-shifting fiber grating and a method thereof. Background technique [0002] High-quality microwave signal sources are widely used in modern radar, wireless communication, software radio, test and measurement and other fields. In the traditional radio frequency / microwave signal generation methods, there are several GHz to hundreds of GHz signals generated by frequency multiplication of low frequency signals by frequency synthesizers; there are also electronic oscillators, such as commonly used crystal oscillators, but the generated signals The frequency is low; there are also microwave signals obtained by mixing the output signals of two single-mode laser sources. The microwave signals generated by these methods inevitably hav...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of traditional photoelectric oscillators with bulky structure and difficult integration, an

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