A wide-tuning ultra-narrow linewidth laser

By combining a Fabry-Perot filtered fiber-type ring cavity and a whispering-gallery mode microcavity, the problem of balancing wavelength tuning and linewidth in wide-tunable ultra-narrow linewidth lasers has been solved, achieving high-power, ultra-narrow linewidth laser output suitable for multiple cutting-edge fields.

CN122418408APending Publication Date: 2026-07-17CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI +1
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-20
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing technologies make it difficult to simultaneously achieve ultra-wide wavelength tuning and ultra-narrow linewidth characteristics in wide-tunable ultra-narrow linewidth lasers. Fabry-Perot fiber lasers have limited tuning range and are sensitive to environmental conditions. The high Q value of whispering-gallery mode microcavities leads to multi-dimensional cavity mode lasing.

Method used

A Fabry-Perot filtered fiber-type ring cavity laser is combined with a whispering-gallery mode microcavity. Wavelength tuning is achieved by adjusting the Fabry-Perot cavity spacing through a piezoelectric transducer. The whispering-gallery mode microcavity provides high-Q single-mode screening, which is combined with a booster optical amplifier to provide gain. An optical isolator and a polarization controller ensure unidirectional beam propagation and polarization correction.

Benefits of technology

It achieves high power output and ultra-narrow linewidth characteristics while maintaining wide tuning range, and has high beam quality. It is suitable for coherent optical communication, precision measurement and spectroscopy, etc., and improves detection accuracy and sensing accuracy.

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Abstract

The present application relates to the technical field of laser, and especially relates to a wide-tuning ultra-narrow linewidth laser, which comprises a boost type optical amplifier, a first optical isolator, an optical coupler, a first polarization controller, a Fabry-Perot filter optical fiber type ring cavity laser, a second optical isolator, an echo wall mode microcavity, a second polarization controller and a third optical isolator which are connected in sequence; wherein the output end of the third optical isolator is further connected with the input end of the boost type optical amplifier, the output end of the boost type optical amplifier is connected with the input end of the first optical isolator, the output end of the first optical isolator is connected with the input end of the optical coupler, the optical coupler has two output ends, one output end of the optical coupler is used as the output end of the wide-tuning ultra-narrow linewidth laser to output target laser, and the other output end of the optical coupler is connected with the first polarization controller. The present application is at least beneficial to make the wide-tuning ultra-narrow linewidth laser realize the characteristics of ultra-wide wavelength range tuning and ultra-narrow linewidth simultaneously.
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