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Microwave signal frequency up-conversion device based on frequency shift feedback laser

A frequency up-conversion and microwave signal technology, which is applied to laser parts, lasers, phonon exciters, etc., to achieve high purity, convenient implementation, and simple structure

Inactive Publication Date: 2019-07-30
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

But at present, the modulation frequency of the acousto-optic frequency shifter is mostly around 100MHz, and it is difficult to obtain high-frequency microwave signals simply through the method of acousto-optic frequency shifting

Method used

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  • Microwave signal frequency up-conversion device based on frequency shift feedback laser
  • Microwave signal frequency up-conversion device based on frequency shift feedback laser
  • Microwave signal frequency up-conversion device based on frequency shift feedback laser

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Embodiment Construction

[0017] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0018] This embodiment provides a microwave signal frequency up-conversion device based on frequency-shift feedback laser, and its working principle is as follows figure 1 shown.

[0019] The device includes a seed laser 1 , a 2×2 coupler 2 , an acousto-optic frequency shifter 3 , a fiber amplifier 4 , a photodetector 5 , a bandpass filter 6 and a spectrum analyzer 7 .

[0020] In this embodiment, the 2×2 coupler 2 has four ports, which are divided into two input terminals and two output terminals, the seed laser 1 is connected to one input terminal of the 2×2 coupler 2, and the photodetector 5 is connected to the 2×2 One output end of the 2 coupler 2, the other input end and the other output end of the 2×2 coupler 2 are connected through an optical fiber to form a loop feedback cavity. In the loop feedback cavity, an acousto-optic frequency shifter 3 an...

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Abstract

The invention discloses a microwave signal frequency up-conversion device based on frequency shift feedback laser, which mainly comprises a seed laser, a coupler, an acousto-optic frequency shifter, an optical fiber amplifier, a photoelectric detector and a band-pass filter. In the system, an optical fiber is utilized to construct an annular feedback cavity; a gain is provided through the opticalfiber amplifier to compensate the loss of the annular feedback cavity; repeated laser in the annular feedback cavity is subjected to frequency shift through the acousto-optic frequency shifter, and high-order frequency shift light is generated; the photoelectric detector is used for carrying out photoelectric conversion on the high-order frequency shift light output from a coupler, and a high-frequency microwave signal is generated; and the high-frequency microwave signal is finally output after being filtered through a band-pass filter. The invention has the advantages that all related optical fiber devices are standardized, which are convenient to implement, simple in structure and low in cost, and the invention is realized in an optical mode, the modulation frequency of the acousto-optic frequency shifter is improved, thereby realizing the acquisition of high-frequency microwave signals.

Description

technical field [0001] The invention relates to optoelectronics and microwave photonics technology, in particular to a microwave signal frequency up conversion device based on frequency shift feedback laser. Background technique [0002] The traditional microwave signal frequency conversion technology is mainly generated by the nonlinear characteristics of electronic devices such as diodes or field effect transistors. In the lower frequency or intermediate frequency range, low phase noise and high-purity microwave signals can be obtained. Its disadvantages are that as the frequency increases, the frequency conversion efficiency decreases, the phase noise becomes larger, the frequency conversion bandwidth is limited, and stability cannot be obtained. High-frequency microwave signal with high purity. To obtain higher frequency microwave signals needs to increase the complexity and cost of the system structure. [0003] Compared with the electric domain method, the microwave ...

Claims

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Application Information

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IPC IPC(8): H01S3/067H01S3/10H01S3/106
CPCH01S3/06754H01S3/06791H01S3/10084H01S3/1068
Inventor 张海洋杨宏志赵长明张子龙
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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