Microwave frequency comb generation device based on dual-light injection semiconductor laser

Abstract

The invention discloses a microwave frequency comb generation device based on a double-light injection semiconductor laser. The device comprises a radio frequency signal source, a first main laser and a second main laser, and the other ends, far away from the radio frequency signal source, of the first main laser and the second main laser are provided with optical couplers; the other ends, away from the first main laser and the second main laser, of the optical couplers are provided with optical circulators, and the other two ends, away from the optical couplers, of the optical circulators are provided with a slave laser and a photoelectric detector respectively; and the first main laser, the second main laser and the optical couplers are respectively provided with a first optical attenuator, a first polarization controller, a second optical attenuator and a second polarization controller. The device has the advantages that a core component is the commercial single-mode semiconductor laser, the device is simple in structure, small in size and low in cost, the generated microwave frequency comb has the advantages of being large in bandwidth, good in flatness and flexible in tuning, the microwave frequency comb with larger bandwidth can be generated, and the commercial single-mode semiconductor laser is low in cost and easy to implement.

Description

technical field [0001] The invention relates to the technical fields of communication, frequency measurement and microwave photonics, in particular to a microwave frequency comb generating device based on double light injection semiconductor lasers. Background technique [0002] With the development of the information industry, the demand for multi-frequency signals has become more and more abundant. A multi-functional radio frequency system integrating various functions such as "radar, communication, electronic information warfare" requires multiple microwave local oscillator signals of different frequencies to achieve corresponding radio frequency functions, and has different functions (early warning, fire control, navigation, etc.). ) multi-band radar usually works in different frequency bands, that is, multiple microwave local oscillator signals of different frequencies are needed at the same time to generate radar emission waveforms of corresponding different bands. The...

AI Technical Summary

Problems solved by technology

Due to the limitation of the bandwidth of traditional electrical components, the development of microwave frequency combs using traditional step recovery diode devices has encountered a bottleneck, which limits the further improvement of the bandwidth of microwave frequency combs (see [Q. L. Li and W. S. Jiang, "Analysis and design of wide- band comb generator based on SRD”, 2012 International Conference on Microwave and Millimeter Wave Technology (ICMMT) , Shenzhen, 2012, pp. 1-3]), so researchers have proposed a variety of microwave frequency comb generation schemes based on photonic technology to overcome this electronic bottleneck

Among the microwave frequency comb generation schemes based on photon technology, the more classic method is to use ultrafast laser pulses to gather on the tunnel section of the scanning tunneling microscope to generate microwave frequency combs (see [M. J. Hagmann and F. S. Stenger, "Linewidth of the harmonics in a microwavefrequency comb generated by focusing a mode-locked ultrafast laser on tunneling junction”, J. Appl. Phys , vol. 114, no. 22, pp. 223107-223107-6.Dec. 2013]), but the pulse repetition frequency output by the mode-locked laser in this scheme determines the spacing of the ultrafast laser grating, resulting in the comb The tooth spacing cannot be adjusted arbitrarily, and the microwave frequency comb is generated by using the harmonic frequency locking state of the negative photoelectric feedback laser (see [S. C. Chan and G. Q. Xia, “Optical generation of a precise microwave frequency comb by harmonic frequency locking”, Opt. Lett , vol. 32, no. 13, pp. 1917-1919, Jul. 2007]), due to the bandwidth limitation of the electronic components in the photoelectric feedback loop, the microwave frequency comb generated has only a few GHz bandwidth and very serious anharmonicity peak thorn

[0003] At present, there have been preliminary studies on the scheme of generating large-bandwidth microwave frequency combs by using the bandwidth enhancement effect caused by single-light injection semiconductor lasers (see [X. Q. Xu and L. Fan, “Numerical investigation on ultra-broadband tunable microwave frequency comb generation using asemiconductor laser under regular pulse injection", IEEE Access , vol. 6, pp.55284-55290, 2018]), but it is difficult to further improve the bandwidth of microwave frequency combs generated by single-light injection semiconductor lasers. On this basis, it is proposed to use the nonlinearity caused by double-light injection semiconductor lasers Frequency mixing effects extend the scheme for generating microwave frequency comb bandwidths in single-light injection semiconductor lasers

Images