High Power Narrow Linewidth Tunable Laser

Abstract

The invention discloses a high power narrow linewidth tunable laser, and relates to the technical field of lasers. The high power narrow linewidth tunable laser comprises an RBG, a grating rotary table, a collimator, gain mediums, an output coupling mirror, a dichroscope, a pump source, a planar full-reflection mirror and a cylindrical curved face full-reflection mirror, wherein the RBG is fixed to a rotary shaft of the grating rotary table; the normal of the RBG is perpendicular to the rotary shaft of the grating rotary table; the rotary shaft of the grating rotary table collides with the central axis of the cylindrical curved face full-reflection mirror; a 45-degree angle is formed between the dichroscope and the horizontal direction; pump light transmitted by the pump source sequentially passes through the dichroscope, the output coupling mirror and the gain mediums to enter the collimator, collimating light output by the collimator and the grating rotary shaft of the RBG are in the same plane, and the direction of the collimating light is perpendicular to the grating rotary shaft. The RBG is adopted as a frequency selecting element, the high power, narrow linewidth and tunable purpose is achieved in cooperation with the full-reflection mirror combination device, and the high power narrow linewidth tunable laser is high in tuning accuracy, stable in output wavelength and compact and reliable in structure.

Description

technical field [0001] The invention relates to the field of laser technology, in particular to a high-power narrow-linewidth tunable laser. Background technique [0002] High-power narrow-linewidth tunable lasers are mainly used in coherent beam combining, coherent detection, coherent optical communication, harmonic generation, gravitational wave detection, etc., and have been widely used in heterodyne sensing, spectral detection, atmospheric monitoring, optical communication, etc. field. These applications not only require high laser power, but also require the laser to have a relatively narrow spectral bandwidth and high wavelength stability. [0003] For high-power tunable lasers, the currently widely used cavity structure consists of a planar diffraction grating and a high-reflection mirror. The plane diffraction grating is used as a frequency-selective element, often as an end mirror, and the laser frequency can be tuned by changing the angle (incident angle) between...

AI Technical Summary

Problems solved by technology

However, in the process of using RBG for wavelength tuning, it is found that the direction of the output beam will be deflected as the grating rotates, which brings new troubles to practical use.

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