High-stability portable femtosecond optical comb system and control method based on optical reference

A high-stability, portable technology, applied in optics, nonlinear optics, instruments, etc., can solve the problems of optical reference accuracy limited absorption spectrum line broadening, and achieve the goal of improving portability, stability, and high stability Effect

Active Publication Date: 2021-08-13
WUHAN INSTITUTE OF TECHNOLOGY
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Problems solved by technology

[0004] However, the accuracy of gas-cavity-based optical references is limited by the broadening of the absorption lines, which in turn is proportional to the affected gas pressure

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  • High-stability portable femtosecond optical comb system and control method based on optical reference
  • High-stability portable femtosecond optical comb system and control method based on optical reference

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Embodiment Construction

[0023] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0024] The control method of the high-stability portable femtosecond optical comb system based on optical reference in the embodiment of the present invention comprises the following steps:

[0025] S1. Select an erbium-doped all-fiber ring cavity mode-locked laser as a femtosecond fiber laser ring oscillator to generate an initial femtosecond laser pulse;

[0026] S2. The initial femtosecond laser pulse is amplified by a fiber amplifier to amplify the energy of the laser pulse, and the spectrum is spread to cover the 1532-1540nm communication band; the repetition frequency of the femtosecond laser...

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Abstract

The invention discloses a high-stability portable femtosecond optical comb system and control method based on optical reference. After the laser cavity and the fiber coupler, the laser pulse is divided into two parts, which enter the fiber gratings with different center wavelengths respectively, and select the comb teeth of an optical frequency comb respectively; The optical reference, photodetector, and feedback system are processed to generate output signals to the driver, and then fed back to the femtosecond fiber laser ring oscillator, so that the femtosecond fiber laser ring oscillator performs corresponding frequency correction, realizing the integration of two optical combs The teeth are frequency-locked to two different absorption lines of gas molecules. The invention does not need to generate the carrier envelope offset frequency signal, simplifies the optical comb system, and has important application value in the research and development of the portable optical comb in the communication band.

Description

technical field [0001] The invention relates to the technical field of femtosecond laser optical frequency combs, in particular to a high-stability portable femtosecond optical comb system and control method based on an optical reference. Background technique [0002] Femtosecond optical frequency combs (referred to as "optical combs") are tools used to achieve precise measurements of optical frequencies. It is generated by a mode-locked laser, which is a periodic pulse sequence in the time domain, and a series of equally spaced and stable optical frequency distributions in the frequency domain, that is, "comb teeth". The optical frequency of the nth comb tooth is f n =n×f rep +f ceo . where f rep and f ceo are the repetition frequency of the laser pulse and the carrier envelope offset frequency, both of which are radio frequency frequencies. There are many schemes for optical comb frequency stabilization. The traditional scheme is to use f rep and f ceo Both are lo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/35
CPCG02F1/353G02F2203/56
Inventor 吴舜王顺金锐博
Owner WUHAN INSTITUTE OF TECHNOLOGY
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