Optical frequency comb generation device and generation method with sweepable comb tooth frequency interval

Abstract

The invention provides an optical frequency comb generation device with the comb tooth frequency interval capable of being scanned. A signal generator form two output ends through a microwave power distributor, wherein the first output end is connected with a photoelectric phase modulator after passing through a first broadband microwave power amplifier, the second output end is connected with a photoelectric intensity modulator after sequentially passing through an adjustable microwave delay line and a second broadband microwave power amplifier, a continuous wave laser carries out output sequentially through the photoelectric phase modulator and the photoelectric intensity modulator , the photoelectric phase modulator and the photoelectric intensity modulator are cascaded, and the photoelectric intensity modulator has direct-current bias. The invention further provides an optical frequency comb generation method. According to the optical frequency comb generation device and method, broadband continuous frequency scanning and accurate arbitrary adjustment of the comb tooth frequency interval are achieved, a generated optical frequency comb is stable in phase, frequency and central wavelength, and tunable, the device is simple in scheme, and low in cost, and the optical frequency comb generation device and method meet the requirement for application in the fields such as the optical measurement field, the laser radar field, the laser spectroscopy field, the optical fiber sensing field, the optical communication field and the microwave photonics field.

Description

technical field [0001] The invention relates to a method for generating an optical frequency comb whose comb-tooth interval frequency can be continuously swept by broadband phase in the technical field of optical communication and optical measurement, specifically, a method using a cascaded photoelectric phase modulator and a photoelectric intensity modulator An optical frequency comb generation device and method for realizing comb tooth interval frequency sweepable with broadband phase continuous frequency scanning, and comb tooth flatness of the optical frequency comb remains unchanged during the entire frequency sweep process. Background technique [0002] Optical frequency combs with precise and stable frequency intervals and coherent teeth are widely used in laser measurement, optical imaging, lidar, laser spectroscopy, optical fiber sensing, optical communication, and microwave photonics. An optical frequency comb with flat comb power, wide spectral range, phase cohere...

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Problems solved by technology

Therefore, it is impossible to achieve broadband continuous frequency sweep of the comb spacing frequency while maintaining the flatness of the optical comb.

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