Distributed feedback light waveguide laser

Abstract

In this invention, in the minus or plus 15%area from the center of the sampling Prague grating which is etched on the light waveguide, on of the sampling period is jumping, while other sampling period is keeping unchanged. The jumped period is 1.4-1.6 or 0.4-0.6 times of the original. The sampling Prague grating makes the respective reflecting peak generate similar slit of the normal grating. The period of this grating possesses the property of linear chirp. When the period jumped to 1.5 or 0.5 times of the original, the -1 level chirp reflecting peak is about to zero.

Description

technical field [0001] The invention belongs to the technical field of optoelectronics and relates to a distributed feedback optical waveguide laser, in particular to the design and manufacture of a single longitudinal mode and single polarization DFB fiber laser. technical background [0002] There are many types of lasers, but their manufacturing principles are basically the same. Most of them are composed of three parts: excitation system, laser material and optical resonator. Due to the development of semiconductor laser technology and optical communication, semiconductor-pumped optical waveguide lasers doped with gain substances have developed rapidly in recent years because of their excellent performance. Optical waveguide lasers mainly include fiber lasers and planar optical waveguide lasers. Distributed feedback (Distributed Feedback, DFB) optical waveguide laser is one of the most important ones. DFB optical waveguide lasers have many excellent characteristics: na...

AI Technical Summary

Problems solved by technology

At present, DFB optical waveguide lasers are relatively mature in theory, but in terms of production, the production of phase shift gratings is relatively complicated, and the yield is not very high, which makes the production of high-quality DFB optical waveguide lasers quite difficult. difficulty

Images