Tunable coupled cavity semiconductor laser

Abstract

The invention discloses a tunable coupled cavity semiconductor laser, which comprises an FP cavity; a variable echo wall micro-cavity connected with the first end of the FP cavity and served as a reflection end face of the FP cavity, wherein the variable echo wall micro-cavity and the FP cavity form a coupled cavity structure; and an electric isolation groove formed between the FP cavity and the variable echo wall micro-cavity. The light enters the variable echo wall micro-cavity after being incident from the second end of the FP cavity. After that, the light with the specific wavelength is reflected back to the FP cavity after being reflected in the variable echo wall micro-cavity. According to the tunable coupled cavity laser, the fundamental mode proportion of a coupling mode of laser emission of the tunable coupled cavity laser in an FP cavity is very high, so that the loss of light in the FP cavity is reduced. Meanwhile, the laser emission mode of the coupled cavity is more stable, and the output power is higher. At the same time, the equivalent reflectivity spectrum of the deformable echo wall micro-cavity is insensitive to gain change in the cavity, and the laser emission mode is not liable to jump to an adjacent longitudinal mode. As a result, the tunable coupled cavity laser can obtain a large wavelength tuning range.

Description

technical field [0001] The disclosure belongs to the technical fields of optical fiber communication and semiconductor lasers, and relates to a tunable coupling cavity semiconductor laser. Background technique [0002] Wavelength tunable lasers are an important part of wavelength division multiplexing systems, and also one of the key components of photonic integrated circuits and next-generation reconfigurable optical networks. With the rapid development of optical communication technology, tunable semiconductor lasers are constantly moving towards low cost, low power consumption, high side mode suppression ratio, high output power, high wavelength switching speed, narrow linewidth and monolithic integration, and high direction of modulation rate. Starting from practical applications, it is required that tunable lasers can be tuned in a wide range, low in cost, stable in operation and easy to operate. [0003] Currently, commercially available monolithically integrated wid...

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Problems solved by technology

However, the process of tunable lasers adjusted based on gratings is very complicated due to the need for secondary epitaxy and high-precision gratings in the manufacturing process.

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