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Device and method for generating flat broadband microwave frequency comb based on cascade modulation light injection semiconductor laser

A microwave frequency and optical frequency comb technology, applied in the field of microwave photonics, can solve difficult problems and achieve the effects of avoiding bandwidth limitations, pure comb lines, and easy tuning

Pending Publication Date: 2022-01-11
SOUTHWEST UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a device and method for generating a flat broadband microwave frequency comb based on cascaded modulated light injection semiconductor lasers, to solve the existing problems: it is difficult to produce a compact and adjustable comb distance, and the comb line ranges from low frequency to high Dense microwave frequency comb with flat 60GHz bandwidth

Method used

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  • Device and method for generating flat broadband microwave frequency comb based on cascade modulation light injection semiconductor laser
  • Device and method for generating flat broadband microwave frequency comb based on cascade modulation light injection semiconductor laser
  • Device and method for generating flat broadband microwave frequency comb based on cascade modulation light injection semiconductor laser

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Embodiment 1

[0043] see figure 1 , a device for generating a flat broadband microwave frequency comb based on cascaded modulated light injection semiconductor lasers, including a signal source module, a direct modulation module, a direct modulation light injection module, a phase shifter, a phase modulator, a phase modulation light injection module, and an optical ring Shapers, semiconductor lasers, detection modules;

[0044] A signal source module for providing electrical signals required for direct modulation and phase modulation;

[0045] The direct modulation module uses one of the electrical signals output by the signal source module to directly modulate the working current of the main laser to generate a seed optical frequency comb with only a few comb lines;

[0046] Directly adjustable optical injection module, used to inject the seed optical frequency comb into the phase modulator;

[0047] a phase shifter for matching the phase relationship between the electrical signal acting...

Embodiment 2

[0063] A method for generating a flat broadband microwave frequency comb based on cascaded modulated light injection semiconductor lasers, which is used in the above embodiment, the steps are as follows:

[0064] Step 1: The radio frequency signal generator RF outputs an electrical signal with adjustable frequency fm and power Pm. The signal is divided into two parts with equal power by the electric power divider PDI, one part is used as a direct modulation signal, and the other part is used as a phase modulation signal. Signal;

[0065] Step 2: Wherein, the direct modulation electric signal directly modulates the driving current of the main laser ML after passing through the variable electric attenuator VEA and the electric amplifier EA, so that the main laser ML outputs a seed optical frequency comb whose comb distance varies with the frequency fm, the The seed optical frequency comb passes through the direct-adjustable light injection module composed of the variable optical...

Embodiment 3

[0072] see figure 2 , showing the specific structure of a preferred embodiment of the microwave frequency comb generation device of the present invention, the device includes a radio frequency signal generator RF, an electric power divider PDI, a variable electric attenuator VEA, an electric amplifier EA, a main laser ML, a variable Optical attenuator VOA, first optical beam splitter FC1, polarization controller PC, phase shifter PS, phase modulator PM, erbium-doped fiber amplifier EDFA, second optical beam splitter FC2, optical power meter PME, optical circulator OC, semiconductor laser SL, third optical beam splitter FC3, photodetector PD, spectrum analyzer OSA and spectrum analyzer ESA;

[0073] The radio frequency signal generator RF outputs an electrical signal with adjustable frequency fm and power Pm. The signal is divided into two parts with equal power by the electric power divider PDI, one part is used as a direct modulation signal, and the other part is used as a p...

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Abstract

The invention discloses a device and method for generating a flat broadband microwave frequency comb based on a cascaded modulated light injection semiconductor laser, and relates to the technical field of microwave photons. The device comprises a signal source module, a direct modulation module, a direct light modulation injection module, a phase shifter, a phase modulator, a phase light modulation injection module, an optical circulator, a semiconductor laser and a detection module, wherein the signal source module is used for providing electric signals required by direct modulation and phase modulation. The generator adopts a direct modulation structure to generate a seed optical frequency comb, and has the advantages of being easy to implement, convenient to tune and the like, and the comb distance can be continuously adjusted only by simply changing the frequency fm of a direct modulation electric signal; a cascade structure of direct modulation and phase modulation is adopted, bandwidth limitation of electronic devices can be avoided, and broadband frequency comb signals are generated; the phase shifter is adopted to match the phases of the direct modulation signal and the phase modulation signal, so the power of each comb line can be balanced to a certain extent.

Description

technical field [0001] The invention relates to the field of microwave photonics technology, in particular to a device and method for generating a flat broadband microwave frequency comb based on cascaded modulated light injected into a semiconductor laser. Background technique [0002] Microwave Frequency Comb (MFC) is composed of a series of discrete microwave signals with equal frequency intervals, and can simultaneously provide several or even hundreds of microwave signals of different frequencies within a continuous frequency bandwidth range. It not only has the penetrability of microwave signals , light-like, informative, etc., and compared with single-frequency microwave signals, MFC has more available frequency components and a larger frequency bandwidth, so it has broad applications in the fields of communication, military, remote sensing, testing, and measurement. Application prospects. [0003] At present, the generation methods of microwave frequency combs mainl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/50H04B10/548
CPCH04B10/503H04B10/548
Inventor 樊利苟宸豪丁珠玉吴正茂夏光琼李红霞邓涛林晓东唐曦高子叶
Owner SOUTHWEST UNIVERSITY
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