Single- and dual-wavelength switchable semiconductor laser and preparation method thereof

Abstract

The invention provides a semiconductor laser with switchable single and dual wavelengths and a preparation method thereof. The semiconductor laser includes an epitaxial structure, a ridge waveguide is formed by etching along the length direction on the epitaxial structure, and a semi-transparent and semi-transparent waveguide is formed by etching on the ridge waveguide. The trans grating is prepared on the epitaxial structure at a position avoiding the transflective grating to form a P-type electrode layer, and the P-type electrode layer includes gain switch region electrodes and optical amplification region electrodes distributed on both sides of the transflective grating; The transflective grating, the optical amplification area electrode and the front cavity surface form a first laser cavity for exciting the first wavelength laser; the electrodes in the gain switch area, the gain switch area electrode and the transflective grating The part, the transflective grating and the back cavity surface form a second laser cavity for exciting the second wavelength laser light. The invention can realize the free switching of single and double wavelengths, so as to realize the free control of one or two energy levels of the pumped alkali metal atoms.

Description

technical field [0001] The invention relates to the technical field of semiconductor lasers, in particular to a semiconductor laser with switchable single and dual wavelengths and a preparation method thereof. Background technique [0002] Semiconductor lasers play an irreplaceable role in communications, radar, electronic countermeasures, electromagnetic weapons, medical imaging, security inspection and other fields. [0003] Semiconductor laser-pumped alkali metal laser is a new type of high-efficiency laser that has developed rapidly in recent years. It has many advantages such as high quantum efficiency, excellent thermal management performance, narrow line width, etc. It is expected to achieve high power and high beam quality laser output, in laser interference, laser damage, laser cooling, laser energy transmission, material processing and magnetic resonance imaging systems, etc. It has broad application prospects. The commonly used alkali metal atoms are potassium, ...

AI Technical Summary

Problems solved by technology

General dual-wavelength semiconductor lasers, such as semiconductor lasers using Y-shaped waveguides, can emit lasers of two wavelengths at the same time, but cannot emit lasers of a single wavelength

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