A High Power Semiconductor Laser with Limited and Long Bandwidth

Abstract

The invention discloses a high-power semiconductor laser with a limited and long bandwidth, comprising: a multimode waveguide, a plurality of fan-shaped inclined gratings are used in the grating area of ​​the multimode waveguide, and the extension lines of the planes of each fan-shaped inclined grating converge on the transverse direction of the multimode waveguide At a point on the central axis, the inclination angle formed by each sector-shaped tilted grating plane and the longitudinal axis of the multimode waveguide and the period of the grating gradually change, and the sector-shaped tilted gratings are distributed axisymmetrically along the transverse central axis. By designing a fan-shaped tilted grating, the change of the grating period and inclination angle can be adjusted, so that the coupling between multiple modes can be adjusted, and the control of the lasing light can be realized, so that the bandwidth of the outgoing wavelength can be flexibly controlled, and then under the control of the external current, achieve the target response.

Description

technical field [0001] The invention relates to the field of optoelectronic technology, and more specifically relates to a high-power semiconductor laser with limited and long bandwidth. Background technique [0002] Optical communication has developed rapidly in recent decades and has gradually become the most mainstream information transmission method. There are three main reasons for this: First, light has a huge bandwidth, generally hundreds of THz, much larger than traditional electromagnetic wave signals, so A large amount of information can be transmitted at the same time; 2. Light is easy to be transmitted, and the cost and loss of optical fibers used to transmit optical signals are very low, and at the same time, it has strong anti-interference ability; 3. The generation and detection of light have been greatly developed. Implemented in semiconductor-based materials and relatively easy to manufacture. In the light source part, semiconductor lasers have many advanta...

AI Technical Summary

Problems solved by technology

However, because of the need to ensure the lateral single mode of the traditional laser, the increase in width is very limited

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