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Frequency stabilization type photoproduction microwave signal source based on optical microcavity

An optical microcavity and optically generated microwave technology, applied in solid-state lasers, etc., can solve the problems of difference frequency signal frequency drift, poor practicability, lasing wavelength drift, etc., achieve frequency stability improvement, improve frequency stability, and suppress phase noise Effect

Inactive Publication Date: 2015-03-25
WUHAN POST & TELECOMM RES INST CO LTD
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Problems solved by technology

Because for two independent lasers (especially semiconductor lasers), the output light has no coherence, the random phase noise is very serious, and the change of their temperature and bias current will also cause the drift of the lasing wavelength, resulting in poor frequency drift
The frequency of the microwave signal generated by this method is unstable, the noise is very large, and the practicability is poor

Method used

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  • Frequency stabilization type photoproduction microwave signal source based on optical microcavity
  • Frequency stabilization type photoproduction microwave signal source based on optical microcavity
  • Frequency stabilization type photoproduction microwave signal source based on optical microcavity

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Embodiment Construction

[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0026] Such as figure 1 As shown, the present invention is based on an optical microcavity frequency-stabilized photogenerated microwave signal source, including an optical loop 10 and a photodetector 20. The optical loop 10 is mainly composed of an optical microcavity 11, a bandpass filter 12, an optical amplifier 13 and an optical coupler 15. In this embodiment, the optical loop 10 also includes an optical delay line 14. The optical loop 10 is used to generate two lasers with different frequencies, that is, dual-frequency laser, and the photodetector 20 is used to receive the dual-frequency laser output from the optical coupler 15, and then use the optical difference frequency effect to obtain optically generated microwave signals.

[0027] Specifically, the optical microcavity 11 is used to periodically select a plurality of lights with fi...

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Abstract

The invention discloses a frequency stabilization type photoproduction microwave signal source based on an optical microcavity, and relates to the field of optical communication devices. The frequency stabilization type photoproduction microwave signal source comprises an optical loop and an optical coupler, wherein the optical loop is mainly composed of the optical microcavity, a band-pass filter, an optical amplifier and an optical coupler. The optical microcavity is used for forming periodic comb filtering with fixed frequency space; the band-pass filter is used for selecting two optical signals with adjacent frequencies from multi-frequency optical signals output from the optical microcavity; the optical amplifier is used for generating optical power gains in the optical loop, achieving hot shooting of the two optical signals with the adjacent frequencies, and forming double-frequency lasers; the optical coupler is used for outputting part of optical power coupling of the double-frequency lasers; a photoelectric detector is used for receiving the double-frequency lasers output by the optical couplers and obtaining photoproduction microwave signals with an optical beat frequency effect. By means of the frequency stabilization type photoproduction microwave signal source, the frequency stability of the microwave signals is improved, and the phase noise of the photoproduction microwave signals is restrained.

Description

technical field [0001] The invention relates to the field of optical communication devices, in particular to a frequency-stabilized optical-generated microwave signal source based on an optical microcavity. Background technique [0002] Microwave or millimeter waves with low phase noise and tunable frequency have a wide range of applications in many fields, including: radar systems, wireless communications, software-defined radios, and modern instrumentation. Generally speaking, high-frequency microwaves or millimeter waves are obtained by multiplying low-frequency stable oscillation signals multiple times. This solution has complex system, high cost and is not conducive to the transmission of microwave signals. In order to overcome these shortcomings, photogenerated microwave technology came into being. [0003] Optical heterodyning is the most widely used photogenerated microwave technology in microwave photonics. The most straightforward implementation of the optical h...

Claims

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Application Information

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IPC IPC(8): H01S1/02
Inventor 肖希邱英陈代高王磊杨奇余少华
Owner WUHAN POST & TELECOMM RES INST CO LTD
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