Switching optical fibre laser on frequency

Abstract

The invention discloses a frequency up-conversion fiber laser, comprising a pumping source 1, a temperature control system 3, a collimation focusing lens group 5, an input coupling lens 7, an output coupling lens 8 and a rare earth mixed fiber 9; wherein, the pumping source 1 outputs stably a pumping laser through the temperature control system 3; the pumping laser is focalized through the collimation lens group 5, permeates the input coupling lens 7 and is coupled into the rare earth mixed fiber 9 to generate a frequency up-conversion laser part which is output through the output coupling lens 8; the input coupling lens 7 and / or the output coupling lens 8 of the frequency up-conversion fiber laser can be replaced by a fiber grating 14. Alternatively, a pumping source 2 and a dichroic beamsplitter 10 can be adopted on the other end surface of the fiber, so as to lead the dichroic beamsplitter 10 to form an angle of 45 DEG with an optical axis. The invention has the advantages of high laser efficiency, a plurality of wavelengths which are output by the laser, and being beneficial for the output of visible light (especially for blue green light) and laser with different wavelengths at the same time and for the miniaturization and integration of devices.

Description

technical field [0001] The invention relates to a fiber laser, in particular to a frequency up-conversion fiber laser. Background technique [0002] With the rapid development of technologies such as high-density data storage, three-dimensional display, submarine communication, optical fiber sensing, and laser medical treatment, there is an increasing need for high-efficiency, low-cost, and high-performance visible light short-wavelength laser sources, especially blue-green lasers. light source. [0003] There are mainly the following methods for blue-green solid-state lasers to obtain laser output: (1) directly using wide-bandgap semiconductor materials for direct excitation; (2) using nonlinear optical crystals for frequency doubling; (3) using rare earth ion doping Materials for upconversion luminescence. For semiconductor laser diodes (LD) in the visible band, there are still a series of technical problems, and the beam quality is not satisfactory, which is limited in ...

AI Technical Summary

Problems solved by technology

This kind of gas laser has the disadvantages of large volume, short life and unstable work, and it works in a continuous manner, it is difficult to obtain high peak power by laser modulation technology

Images