A device and method for generating a broadband microwave frequency comb
A technology of microwave frequency and frequency comb, which is applied in the field of optics, can solve problems such as power imbalance of microwave frequency comb, and achieve the effects of stable frequency, convenient operation and simple system structure
Inactive Publication Date: 2020-11-24
SOUTHWEST UNIV
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However, the power of the low-frequency comb lines of the microwave frequency comb produced by this method is obviously higher than that of other high-frequency comb lines. flatness, the power of this microwave frequency comb is extremely uneven
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[0021] Below in conjunction with accompanying drawing and specific examples the implementation of the present invention will be further described,
[0022] Direct current modulation The first semiconductor laser DFB-SL1 outputs a regular pulse signal to generate a seed frequency comb. The comb line power of the seed frequency comb is unbalanced and the bandwidth is small. The regular pulse signal is divided into two paths by the first optical beam splitter FC1 , one way is input into the microwave frequency comb detection system to monitor the performance of the seed frequency comb, and the other way is unidirectionally injected into the second semiconductor laser DFB-SL2 through the optical pulse injection system and the optical circulator, and the second semiconductor laser is DFB-SL2 outputs broadband microwave frequency comb signals with balanced power, clean comb line and stable frequency. Since the comb distance of the seed frequency comb can be simply changed by changin...
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The present invention discloses a device and a method for generation of broadband microwave frequency combs, and relates to the technical field of optics. A signal source outputs modulation signals with adjustable modulation frequency and modulation power to directly modulate a working current of a first semiconductor laser DFB-SL1 to output regular pulse signals as seed frequency combs, the regular pulse signals are uniaxially injected into a second semiconductor laser DFB-SL2 through an optical pulse injection system and an optical circulator, the frequency spectrum extension effect caused by optical injection is employed to allow the second semiconductor laser DFB-SL2 to output broadband microwave frequency comb signals with balance power, pure comb lines and stable frequency, and the comb distances of the seed frequency combs can simply change the frequency of the modulation signals to perform continuous regulation so that the comb distances of the microwave frequency combs outputby the second semiconductor laser DFB-SL2 based on the optical pulse injection can perform large-scale continuous regulation. The device and the method for generation of broadband microwave frequencycombs are suitable for the fields of radar distance measurement, broadband wireless communication, satellite communication and military reconnaissance.
Description
technical field [0001] The invention relates to the field of optical technology, in particular to a microwave frequency comb generation technology. Background technique [0002] The microwave frequency comb is composed of a series of comb-shaped microwave signals with equal frequency intervals. It can provide dozens of microwave signals of different frequencies in one frequency band at the same time. Therefore, it is widely used in radar ranging, broadband wireless communication, satellite communication, military reconnaissance and other fields. Has a wide range of applications. [0003] At present, the generation methods of microwave frequency combs mainly include electrical and optical methods. The traditional electrical method is limited by the bandwidth of the electronic devices used, so it can only generate microwave frequency combs with a bandwidth of more than ten GHz, and the microwave frequency combs generated by electrical methods have defects such as the comb dis...
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IPC IPC(8): H01S1/02
CPCH01S1/02
Inventor 樊利吴正茂夏光琼钟祝强邓涛林晓东唐曦高子叶
Owner SOUTHWEST UNIV