Wavelength switching type semiconductor laser

Abstract

The invention provides a wavelength switching type semiconductor laser. The laser comprises a gain chip, an external cavity frequency selection device and a wave plate, an F-P resonant cavity is formed between the external cavity frequency selection device and the gain chip, the structure of the external cavity frequency selection device is a planar waveguide grating, and based on the birefringence effect of the planar waveguide grating, a TE mode and a TM mode reflected by the external cavity frequency selection device are split; and the wave plate is arranged in the F-P resonant cavity, the loss and gain of the TE mode and the TM mode in the F-P resonant cavity are adjusted by rotating the wave plate, and lasing switching of the TE mode and / or the TM mode in the F-P resonant cavity is achieved. The laser has the characteristics of high compactness and high integration, and can realize the modularization of butterfly-shaped packaging and the miniaturization of devices; and meanwhile, the preparation process of the key component is simple, and the selection of two modes can be realized by a single frequency selection device prepared by only one mask plate, so that the cost is further reduced.

Description

technical field [0001] The invention relates to the technical field of optoelectronic devices, in particular to a wavelength switching semiconductor laser. Background technique [0002] Dual-wavelength narrow-linewidth semiconductor lasers have the characteristics of dual frequency, high coherence, low phase noise and high frequency stability, making them widely used in wavelength division multiplexing systems, coherent optical communications, laser coherent detection, fiber optic hydrophone detection and microwave Fields such as photonics have shown significant advantages and application value. Especially for the transmission rate and bandwidth limitations faced by ultra-high-speed optical communication systems, the potential solution to this problem is to use millimeter-wave or even terahertz-wave communication systems, and high-coherence dual-wavelength narrow-linewidth lasers are obtained through nonlinear The difference frequency is an ideal light source for generating...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to propose a wavelength-switched semiconductor laser to overcome the insufficient compactness and integration of dual-wavelength narrow-linewidth lasers in the prior art And the problems of high production cost and complicated production process

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