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A ridge-waveguide distributed feedback semiconductor laser operating in a single longitudinal mode with a fixed wavelength

A technology of distributed feedback and lasers, applied in the field of lasers, can solve problems such as the inability to achieve single-wavelength longitudinal mode lasing, and achieve the effects of low production costs, high device reliability, and high output power utilization

Active Publication Date: 2017-04-05
日照市艾锐光电科技有限公司
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Problems solved by technology

[0005] The invention provides a ridge waveguide distributed feedback semiconductor laser working in a fixed-wavelength single longitudinal mode, which can at least solve the problem that the refractive index-coupled uniform grating DFB laser commonly used in optical fiber communication networks cannot achieve a single wavelength with a low cost. The problem with longitudinal mode lasing

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  • A ridge-waveguide distributed feedback semiconductor laser operating in a single longitudinal mode with a fixed wavelength
  • A ridge-waveguide distributed feedback semiconductor laser operating in a single longitudinal mode with a fixed wavelength
  • A ridge-waveguide distributed feedback semiconductor laser operating in a single longitudinal mode with a fixed wavelength

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Embodiment Construction

[0032] The ridge waveguide distributed feedback semiconductor laser with fixed wavelength and single longitudinal mode provided by the present invention has a main body of a double ridge ridge waveguide structure formed on a single semiconductor laser tube core, the two ridges are parallel and have the same length; the two ridges The width of one of the ridges relative to the other is locally widened near the side facing away from the end face of the laser. In this way, the present invention can achieve a phase difference of π in the optical field reflectivity of the two ridges at the back end face, so that one of the two ridges can always be within the Bragg (Bragg) stop band at the front end face of the laser. The wavelength lasing on one side is specified, so the purpose of realizing the single longitudinal mode of fixed wavelength is achieved, and the production cost is low.

[0033] The present invention will be further described below in conjunction with the embodiments ...

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Abstract

The invention provides a ridge waveguide distributed feedback semiconductor laser enabling a fixed-wavelength single longitudinal mode to work. The ridge waveguide distributed feedback semiconductor laser is mainly characterized in that a single semiconductor laser tube core is provided with a double-ridge ridge waveguide structure, two ridges are parallel and are identical in length, and the width of one ridge is locally widened relative to the other ridge on the side close to the back end face of the laser. Phase positions of light field reflectivity of the two ridges at back end face of the laser differ by phi, and accordingly one of the two ridges at the front end face of the laser can always shot on a designated side of a Bragg stop band, the aim of enabling the fixed-wavelength single longitudinal mode to work is achieved and manufacturing cost is low.

Description

technical field [0001] The invention relates to a laser, in particular to a distributed feedback (DFB) semiconductor laser with fixed-wavelength single-longitudinal-mode lasing at a specified side wavelength of a Bragg (Bragg) stop band. Background technique [0002] In the past few decades, the rapid development of the Internet and multimedia applications has made users' requirements for communication bandwidth increase day by day. Wavelength Multiplexing Method (WDM for short) technology based on wavelength multiplexing uses optical carrier signals of different wavelengths to carry different transmission information. Then separate the different optical carriers, and restore the original signal of each channel after the receiver. The multi-wavelength light source at the transmitting end in the WDM system is an indispensable light source device in the transmitter of the system. The individual channels in a light source are becoming denser and denser, driven by ever-increas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S5/22
Inventor 奚燕萍李洵
Owner 日照市艾锐光电科技有限公司
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