Tunable photoelectric oscillator based on PT symmetric combination with high-Q resonator

An optoelectronic oscillator and resonator technology, applied in the field of microwave photonics, can solve the problems of disturbing the OEO signal onset and affecting the quality of the output signal, so as to reduce the phase noise, improve the side mode suppression ratio, and increase the link gain difference. Effect

Active Publication Date: 2021-12-14
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

The resonator resonant cavity can achieve a larger Q value due to its lower transmission loss, thereby obtaining a greater signal delay, but its multi-mode resonance interferes with the start-up of the OEO signal, thereby affecting the quality of the output signal

Method used

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  • Tunable photoelectric oscillator based on PT symmetric combination with high-Q resonator
  • Tunable photoelectric oscillator based on PT symmetric combination with high-Q resonator
  • Tunable photoelectric oscillator based on PT symmetric combination with high-Q resonator

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Embodiment Construction

[0025] 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 the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0026] The invention provides a tunable photoelectric oscillator based on high-Q resonators combined with PT symmetry,

[0027] The continuous light laser source 1 emits continuous light as an optical carrier input to the phase modulator 3 and is modulated by the microwave signal output by the radio frequency antenna to generate first-order upper and lower sidebands with opposite phases. The hig...

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Abstract

The invention discloses a tunable photoelectric oscillator based on PT symmetric combination with a high-Q resonator, and belongs to the field of microwave photonics. The tunable photoelectric oscillator comprises a continuous light laser light source, a polarization controller, a phase modulator, a high-Q resonator, a Mach-Zehnder interferometer, a photoelectric detector, an electric amplifier and an electric power divider. a light carrier output by the laser enters the phase modulator, a microwave signal is modulated to the light carrier through the phase modulator and input to the high-Q resonator, a tunable microwave photonic filter is obtained, delay and preliminary mode selection are performed on the microwave signal, mode selection is further enhanced in combination with PT symmetric breaking on the basis, finally, a microwave signal carried on an optical signal is detected through a photoelectric detector, positive feedback is introduced through the photoelectric oscillator loop, and the microwave signal is finally output. According to the invention, the high-Q resonator is used for time delay and preliminary mode selection, and PT symmetric breaking enhancement mode selection is further combined, so that the output frequency tunable photoelectric oscillator is realized.

Description

technical field [0001] The invention belongs to the field of microwave photonics, and more specifically relates to a tunable photoelectric oscillator based on PT symmetry combined with a high-Q resonator. Background technique [0002] An optoelectronic oscillator (hereinafter referred to as OEO) usually uses a low-loss optical fiber as an energy storage element, and is a positive feedback optoelectronic hybrid cavity. Because of its ultra-high spectral purity, wide-band high-frequency working potential and relatively simple structure and working conditions, it has become a very competitive high-end microwave / millimeter wave signal generator. The basic structure of OEO was first proposed by X.Steve Yao and Lute Maleki in 1994. The main structure includes: laser, electro-optic modulator, long optical fiber, photodetector, microwave amplifier and narrow bandwidth electrical bandpass filter (Electrical bandpass filter) , EBF). The laser generates an optical carrier, and the mi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S1/02
CPCH01S1/02
Inventor 于源王琳崔帅张新亮
Owner HUAZHONG UNIV OF SCI & TECH
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