Waveguide mode-locked laser

Abstract

The invention provides a waveguide mode-locked laser, comprising a semiconductor saturable absorption mirror, a waveguide grain medium, a waveguide grating and a pumping source. The semiconductor saturable absorption mirror and the waveguide grating are respectively arranged at the both ends of the waveguide grain medium; and the pumping source is arranged above the waveguide grating. According to the waveguide mode-locked laser provided by the invention, the semiconductor saturable absorption mirror is fixedly arranged at one end of the grain medium by using a special means as a cavity mirror in a laser cavity; and furthermore, the grating is written into a waveguide channel on a doped substrate in a point-to-point manner by using a femtosecond micromachining system, and the passive mode locking is realized by utilizing dispersion compensation of the grating and characteristics of the semiconductor saturable absorption mirror.

Description

technical field [0001] The invention relates to the field of laser technology, in particular to a picosecond passive mode-locked laser based on a full waveguide structure in which the waveguide is the gain medium. Background technique [0002] With the development of laser technology and optical waveguide technology, the development of integrated optics has been effectively promoted, and a certain foundation has been laid for the production of optical integrated chips. Due to its poor stability, the light source is difficult to couple with the optical fiber. The optical fiber source is relatively large in the optical integrated device, and it is difficult to adapt to the development of optical integrated devices, let alone the production of optical integrated chips. In 2002, J.R.Lee's research group pumped the Nd:YAG gain medium with a length of 60 mm, a width of 11 mm and a thickness of 200 μm by using a semiconductor laser array to obtain an output of 150 W. signal light,...

AI Technical Summary

Problems solved by technology

[0003] The advantage of waveguide mode-locked lasers is that they are highly integrated, which will effectively promote the development of optical integration technology. Unfortunately, the current ultra-short and ultra-fast mode-locked lasers, in addition to the development of circular waveguides such as optical fibers, the current waveguide lasers exist There are many problems with discrete components. For example, only waveguide devices are used as gain media in waveguide lasers, while external solid or fiber devices are used for pumping and other devices, which greatly reduces the high integration of waveguide mode-locked lasers. , also set obstacles for the development of optical integration technology

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