Tunable Optically Generated Microwave Source Based on Semiconductor Dual-mode Laser

Abstract

The invention provides a high-quality tunable photoproduction microwave source based on a semiconductor double-module laser. The microwave source comprises an amplification feedback laser, a three-port optical circulator, an optical coupler, an optical fiber amplifier and a polarization controller, wherein a port 2 of the optical circulator is connected with the amplification feedback laser, a port 1 of the optical coupler is connected with a port 3 of the optical circulator, the input end of the optical fiber amplifier is connected with a port 2 of the optical coupler to enable the feedback strength to be larger than a threshold value of self-injection locking of the amplification feedback laser, the input end of the polarization controller is connected with the output end of the optical fiber amplifier, the output end of the polarization controller is connected with a port 1 of the three-port optical circulator, and the polarization controller is used for controlling the polarization state of feedback signals, injected back by a feedback circuit, of the amplification feedback laser. The microwave source can overcome the defects of the stability and the line width of the microwave signals generated by the double-module laser, the high-quality microwave source with the tunable narrow line-width can be generated without using an external microwave source as a standard, and the microwave source has the advantages of being high in integration level, compact in structure, good in stability, simple in manufacturing process, low in cost and easy to realize.

Description

technical field [0001] The invention relates to the technical field of optically generated microwaves, in particular to a tunable optically generated microwave source based on a semiconductor dual-mode laser. Background technique [0002] In the field of satellite communication system, optical wireless communication system, radar system, high-precision measurement technology, optical fiber communication field and optical information processing field, microwave sources with high frequency, tunable, narrow line width and low phase noise are very important. application. The traditional microwave signal source uses the electronic oscillation circuit, and then realizes the microwave signal of the required frequency through multi-stage frequency multiplication technology. The signal quality produced by this method deteriorates with increasing frequency, and the cost also increases sharply with increasing frequency. High-frequency microwave signals usually need to be transmitted ...

AI Technical Summary

Problems solved by technology

However, its linewidth is generally in the order of MHz, and the stability is not high enough, and it has not reached the standard for application in optical microwave communication.

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