Small divergence angle ridge-type laser device and manufacturing method therefor

Abstract

The invention provides a small divergence angle ridge-type laser device and manufacturing method therefor. The laser device comprises an epitaxial structure and a ridge waveguide structure formed on the epitaxial structure, wherein the ridge waveguide structure comprises a parallel gain region and a light field mode expanding region that are orderly arranged along a light emitting direction, width of the light field mode expanding region gradually increases along the light emitting direction, a narrow end of the light field mode expanding region is connected with the parallel gain region, width of the narrow end of the light field mode expanding region equals width of the parallel gain region, the parallel gain region is 100 to 300 um in length, and the light field mode expanding region is 10 to 150 um in length. According to the small divergence angle ridge-type laser device and the manufacturing method therefor, no adjustment of the epitaxial structure is needed, no new epitaxial technology or technology process is needed, increase of a threshold current can be controlled in a restrained way, output power of a semiconductor laser device cannot be limited, output power can be improved by more than 10%, and main parameter performance during utilization can be improved to a certain extent.

Description

technical field [0001] The invention relates to a ridge laser, in particular to a small divergence angle ridge laser and a manufacturing method thereof. Background technique [0002] Chip technology based on semiconductor technology has contributed to the rapid development of today's information technology, greatly enhancing our ability to obtain and exchange information. In the information age, the transmission and acquisition of information is crucial to everyone and the collective. The demand for information is getting higher and higher, requiring higher transmission speeds, wider acquisition ranges, and longer usage time. However, with the actual needs of fiber-to-home, fiber-to-village, and future new equipment or other possible needs, ONU (Optical Network Unit, Optical Network Unit), OLT (Optical Line Terminal, Optical Line Terminal) and other equipment in the information network The usage and requirements of the equipment will be higher and higher, and higher requir...

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Problems solved by technology

[0008] The purpose of the present invention is to provide a small divergence angle ridge laser and its manufacturing method, which is intended to solve the need of the existing small divergence angle ridge laser to adjust the epitaxial structure and will increase the threshold current and the total output power is not high The problem

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