Method and device for measuring optical frequency with high power fiber optical frequency comb

Abstract

The invention discloses a method and device for measuring the light frequency through a high-power optical fiber optics frequency comb. A mode locking pulse laser serves as an optics frequency comb seed resource to set up the high-power optical fiber optics frequency comb, and a carrier envelope phase signal of the optics frequency comb is locked at the zero frequency; the beat frequency is carried out on the output light of the optics frequency comb and continuous lasers to be tested, the repeated frequencies of the pulse of the optics frequency comb seed resource are finely adjusted through an externally loaded modulation signal, a plurality of sets of beat frequency signals corresponding to different repeated frequencies are obtained, and therefore the accurate measuring of the frequency of the continuous lasers to be tested can be achieved. The method and device have the advantages that the device is stable in structure, the measuring process is easy, and the application is flexible.

Description

technical field [0001] The invention belongs to the field of laser science and technology, in particular to a method and device for measuring optical frequency with a high-power fiber optical frequency comb. Background technique [0002] The development of science and technology needs to be established on the basis of precise experimental measurement. As the measurement reference value, optical frequency determines the accuracy and definition of many other physical quantities. The precise measurement of optical frequency means the improvement of measurement accuracy, which not only provides a more precise time-frequency reference for the determination of many basic physical constants, but also facilitates the development of atomic clocks with microwave quantum frequency standards as the core, which will improve the global The accuracy of the positioning system builds an information highway. Today, with the increasing development of information technology, the research of hi...

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Problems solved by technology

However, the existing optical comb beat frequency method requires the optical comb seed source to work at a high repetition rate of hundreds of MHz or even GHz. The high repetition frequency optical comb has high requirements on the device, the system stability is limited, and the measurement accuracy is limited; secondly, The existing optical comb beat frequency method does not measure the absolute frequency of the laser, and two optical combs are required to directly read out the optical frequency, or the use of measuring instruments such as a wavelength meter for calculation, which undoubtedly adds inconvenience to the entire measurement process

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