Controllable multi-wavelength fiber external cavity laser based on metasurface external cavity mirror

Abstract

The invention discloses a controllable multi-wavelength optical fiber external cavity laser based on a super-surface external cavity mirror and belongs to the field of lasers. The laser comprises an optical fiber amplifier, an optical fiber ring, an optical fiber collimator, an optical fiber coupler, and a super-surface external cavity mirror, wherein, signal light is amplified in that optical fiber amplifier, transmitted to the port 2 ' through the optical fiber ring port 1', collimated by the optical fiber collimator, and vertically incident on the super-surface external cavity mirror; The super-surface external cavity mirror is used for receiving incident collimated light, wavelength selecting the collimated light, and reflecting the selected single / multiple wavelengths to the optical fiber collimator; The reflected light is collected by the optical fiber collimator and transmitted to the port 3 'through the optical fiber annulator port 2', then enters the optical fiber coupler forpartial output and partially returns to the optical fiber amplifier to form a loop. The invention realizes the controllable output of the single / multi-wavelength laser through the super-surface external cavity mirror, and has the advantages of simple structure, low cost and good reliability.

Description

technical field [0001] The invention belongs to the field of laser technology, and more specifically relates to a controllable multi-wavelength optical fiber external cavity laser based on a metasurface external cavity mirror. Background technique [0002] With the development of large-capacity optical fiber communication network, dense wavelength division multiplexing technology can be widely used. In dense wavelength division multiplexing system, its core component laser light source - multi-wavelength laser provides the required light source for multiple channels at the same time, which greatly reduces the cost of the optical transmitter, and is an ideal solution for low-cost transmission. [0003] Multi-wavelength lasers are playing an increasingly important role in fiber-optic communication, fiber-optic sensing, and multi-beam interferometry systems. In the existing related reports, multi-wavelength lasers can use either semiconductor laser arrays, multiple fiber grati...

AI Technical Summary

Problems solved by technology

The research on passive devices based on metasurface structures, including total reflection mirrors, Huygens metasurfaces, sensors, etc., is relatively mature, but the combination with active devices is still rarely reported

[0005] Therefore, the development of a multi-wavelength fiber external cavity laser based on a metasurface external cavity mirror can not only output controllable multi-wavelength lasers, but also solve the defects of existing multi-wavelength lasers with complex structures and unsatisfactory output wavelength stability. technical problems in the field

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