Multi-Wavelength Distributed Feedback Ridge Waveguide Semiconductor Laser Array and Its Application

A laser array and distributed feedback technology, which is applied to semiconductor lasers, semiconductor laser devices, lasers, etc., can solve the problems of increasing threshold current, reducing feedback light, and low device side mode suppression, achieving simplified manufacturing process and large wavelength tuning ability to avoid the effects of multiple transverse mode oscillations

Active Publication Date: 2019-11-19
日照市艾锐光电科技有限公司
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Problems solved by technology

Generally, there are still problems to be solved in the method of sampling the grating, such as the influence of the reflection peak at the Bragg center wavelength of the reflection spectrum, the side mode suppression ratio of the device is low, and the reduction of the feedback light brought by the grating sampling, thus increasing the threshold electric current

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  • Multi-Wavelength Distributed Feedback Ridge Waveguide Semiconductor Laser Array and Its Application
  • Multi-Wavelength Distributed Feedback Ridge Waveguide Semiconductor Laser Array and Its Application
  • Multi-Wavelength Distributed Feedback Ridge Waveguide Semiconductor Laser Array and Its Application

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Embodiment Construction

[0030]The present invention will be further described below in conjunction with the embodiments and accompanying drawings.

[0031] In order to realize the four-channel DFB laser array with different wavelength outputs, the width of the ridge waveguide and the inclination angle relative to the grating of the four lasers in the array are all different. And we use loss-coupling or gain-coupling gratings, so we can ensure that each laser in the array works in a single longitudinal mode. The curved connecting waveguide at both ends of the inclined waveguide in the present invention can make the light output direction transition to the direction perpendicular to the light output surface, and can reduce reflection loss. The cross-sectional view of the device in the x-y plane and the top view in the x-z plane of the top are shown in figure 1 with figure 2 shown.

[0032] The working principle of the multi-wavelength laser array provided by the present invention is described as fo...

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Abstract

The invention provides a multi-wavelength semiconductor laser array based on uniform grating. A main body of the array is a semiconductor laser array consisting of a plurality of single longitudinal mode distributed feedback ridge waveguide semiconductor lasers, and in the array, the ridge waveguide widths and ridge waveguides of the ridge waveguide semiconductor lasers are different relative to the inclination angle of the grating. Therefore, the array can realize that the effective refractive indexes and effective grating periods of the lasers in the laser array change simultaneously, so that the single longitudinal mode lasering of different lasers on different wavelengths is realized. Through different combinations of widths and inclination angles of reasonable ridge waveguides, the purpose that the lasering lengths of the lasers in the laser array are different can be reached, and the manufacturing technology is compactable with a traditional technology and low in cost.

Description

technical field [0001] The invention relates to a semiconductor laser in the field of optoelectronic technology, in particular to a multi-wavelength distributed feedback ridge waveguide semiconductor laser array and its application. [0002] technical background [0003] With the rapid development of the Internet and information technology, wavelength division multiplexing (WDM) plays an increasingly important role in realizing high-speed and large-capacity transmission of information in optical fiber communication systems. A multi-wavelength light source that can work precisely at a set wavelength and has a fixed wavelength interval is one of the important optoelectronic devices to realize a WDM system, and a distributed feedback (DFB) laser array is an ideal choice for realizing this multi-wavelength light source. Compared with the Fabry-Perot (FP) laser with centralized feedback through two end faces, the DFB semiconductor laser uses a built-in grating to realize the distr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S5/40
CPCH01S5/40H01S5/4087
Inventor 奚燕萍陈洋俊李洵
Owner 日照市艾锐光电科技有限公司
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