A Partial Grating Electroabsorption Modulation Laser and Its Design Method

Abstract

The present invention belongs to the laser technical field and provides a partial-grating electroabsorption modulated laser and a design method thereof. The partial-grating electroabsorption modulated laser consists of a laser region and a modulator region; a region where a Bragg grating is disposed is coupled with the modulator region; the cavity length of a laser is 400 microns; the cavity length of a modulator is 210 microns; the length of a region where no gratings exist is 220 microns; the length of the region where the grating is disposed is 180 microns; the linear gain coefficient of the partial-grating electroabsorption modulated laser is controlled at 6*10<-20>m<2); and the reflectivity of a reflection film of the partial-grating electroabsorption modulated laser at the light outgoing surface of the modulator region is at a 1 / 1000 level. According to the partial-grating electroabsorption modulated laser and the design method thereof of the present invention, a partial grating structure is designed to replace an existing all-grating structure, and the quality factor of the laser can achieve a 1 / 1000 level quality factor of an all-grating structure electroabsorption modulated laser under a condition that the reflectivity of the reflection film of the partial-grating structure electroabsorption modulated laser is at the 1 / 1000 level.

Description

【Technical field】 [0001] The invention relates to the technical field of lasers, in particular to a partial grating electroabsorption modulation laser and a design method thereof. 【Background technique】 [0002] High-speed light sources are the core components of optical communication systems and have always been a research hotspot in the field of optoelectronics. Among many light source solutions, the monolithic integrated device of electro absorption modulator (Electro absorption, abbreviated as: EAM) and distributed feedback laser (abbreviated as: DFB) has the advantages of compact structure, compatible manufacturing process, small chirp, With significant advantages such as low power consumption and strong functional scalability, it is an ideal optical signal source for wavelength division multiplexing networks and optical time division multiplexing networks. [0003] In the data transmission system, the additional optical feedback on the light-emitting end of the semico...

AI Technical Summary

Problems solved by technology

The high anti-reflection film requires high coating equipment and is expensive, and due to the difficulty of processing, the anti-reflection film of 1 / 10,000 is not yet popular among processing suppliers.

2. Make the light-emitting surface into a curved waveguide, so that after the angle of the light is changed, the light reflected into the modulator part will be reduced, such as figure 1 As shown, the process of this method is complicated, and the chip packaging in the later stage is difficult

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