Frequency-stabilized laser system and frequency-stabilized laser generation method based on conjugate interference filter

Abstract

The invention discloses a frequency stabilization laser system based on a conjugate interference filter. The frequency stabilization laser system includes a resonance module, a light amplification module, a filtering module, and an optical divider, the resonance module includes a first collimator, the conjugate interference filter, and a second collimator, the output end of the optical divider is connected with the input end of the first collimator, the output end of the first collimator faces the input end of the conjugate interference filter, the output end of the conjugate interference filter faces the input end of the second collimator, the output end of the second collimator is connected with the input end of the optical divider, the first output end of the optical divider is connected with the input end of the light amplification module through the filtering module, and the second output end of the optical divider serves as the output end of the frequency stabilization laser system. The conjugate interference filter is not sensitive to the influence of the extraneous environment, and the problem of laser wavelength frequency drift can be effectively solved.

Description

technical field [0001] The invention relates to the technical field of gas sensing, in particular to a frequency-stabilized laser system based on a conjugate interference filter and a method for generating a frequency-stabilized laser. Background technique [0002] Fiber lasers have the advantages of compatibility with optical fibers and optical fiber devices, narrow linewidth, high output power, low intensity noise, and excellent stability. They have important applications in the fields of optical fiber communication, optical sensing, and high-resolution optical testing. At present, multi-wavelength erbium-doped fiber lasers with stable performance are widely used in the fields of optical fiber communication, optical fiber sensing and detection, and microwave photonics, so they are increasingly becoming a hot topic for scientists from all over the world. [0003] At present, due to the advantages of wide bandwidth and compatibility with optical fiber systems in the 1.55 μm ...

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Problems solved by technology

However, because the comb filter is cumbersome to manufacture, the structure is complex and the cost is high

However, using multiple fiber gratings to select wavelengths to achieve multi-wavelength oscillation, on the one hand, the cost is relatively high because multiple pairs of different FBGs are required to form a resonant cavity; on the other hand, fiber gratings are sensitive to environmental factors such as temperature, vibration stress, etc. Instabilities are added to the

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