Tunable semiconductor laser with Littman-structured outer cavity

Abstract

The invention discloses a tunable semiconductor laser with a Littman-structured outer cavity. The tunable semiconductor laser comprises a base, a supporting base, an optical path adjustment accessory, a raster base, a reflecting mirror base, a sleeve base, a one-dimensional flexible platform and a flexible hinge, wherein the supporting base is fixed on the horizontally-arranged base; the supporting base comprises a bottom plate and a supporting table, wherein the cantilever of the supporting table is arranged on the bottom plate; the optical path adjustment accessory, the raster base and the flexible hinge are fixed on the bottom plate; a vertical mounting plane is arranged on the supporting table; the one-dimensional flexible platform is mounted on the vertical mounting plane; the one-dimensional flexible platform is provided with a mounting part used for mounting the sleeve base; the sleeve base is mounted on the mounting part through a semiconductor cooler; the flexible hinge is hinged with the cantilever; a PZT used for pushing the cantilever to swing around the hinge is also mounted on the flexible hinge; the reflecting mirror base is fixed at the tail end of the cantilever; and a reflecting mirror mounting part is arranged at the upper part of the reflecting mirror base in a cantilever-shaped manner. The tunable semiconductor laser with the Littman-structured outer cavity can realize large-range frequency modulation without mode hopping.

Description

technical field [0001] The invention belongs to the technical field of semiconductor lasers, and does not particularly relate to a Littman structure tunable external cavity semiconductor laser. Background technique [0002] Tunable semiconductor lasers have the advantages of narrow line width, tunable wavelength, and small size. Compared with traditional lasers, tunable external cavity semiconductor lasers can achieve continuous wavelength tuning without mode hopping through the matching of the epitaxial resonator and the laser cavity. Measurements, atomic physics and other fields play an important role. Especially in the field of large-scale assembly, laser ranging technology has become a key supporting technology for spatial pose detection in the assembly process. The frequency scanned interferometry (FSI) system with tunable semiconductor lasers can realize absolute distance measurement without guide rails, and is a modern distance measurement system that is more suitabl...

AI Technical Summary

Problems solved by technology

Existing Littman-type external cavity tunable lasers have disadvantages such as small tuning range, slow tuning and high cost of anti-reflection coating

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