A High Power Narrow Linewidth Tunable Laser Using Quadric Mirror

Abstract

The invention discloses a high-power narrow-linewidth tunable laser device using a quadric surface mirror, and relates to the technical field of lasers. The high-power narrow-linewidth tunable laser device using the quadric surface mirror comprises an RBG, a grating turntable, a collimator, a gain medium, an output coupling mirror, a dichroscope, a pumping source, a plane completely reflecting mirror and the quadric surface mirror. The RBG is fixed on a rotating shaft of the grating turntable, the normal of the RBG is perpendicular to the rotating shaft of the grating turntable, the rotating shaft of the grating turntable coincides with the focus axis of the quadric surface mirror, the normal of the plane completely reflecting mirror is perpendicular to the rotating shaft of the grating turntable and is parallel to the axis of the quadric surface mirror, the dichroscope forms a 45-degree angle with the horizontal direction, pump light emitted by the pumping source passes through the dichroscope, the output coupling mirror and the gain medium in sequence and enters the collimator, collimation light output by the collimator is co-plane with the rotating shaft of an optical grating of the RBG, and the direction of the collimation light is perpendicular to the rotating shaft of the optical grating. The RBG is adopted as a frequency-selecting element, and a completely reflecting mirror combined device is matched to achieve the purposes of high power, narrow linewidth and tunability.

Description

technical field [0001] The invention relates to the field of laser technology, in particular to a high-power narrow-linewidth tunable laser using a quadric surface mirror. 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...

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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