High-efficiency diode pumping 1666nm Raman laser

Abstract

The invention discloses an efficient diode pumping 1666nm Raman laser which comprises a laser diode pumping source, a focusing coupling system, a rear cavity mirror of a Raman resonant cavity, a pumping laser gain medium, an acousto-optic Q switch, a Raman gain medium, a front cavity mirror of the Raman resonant cavity and a spectroscope. Pumping laser of the laser diode pumping source is focused through the focusing coupling system and enters the Raman resonant cavity through the rear cavity mirror of the Raman resonant cavity. The pumping laser is incident into the pumping laser gain medium, the pumping laser gain medium is subjected to population inversion to generate stimulated radiation, and 1444nm fundamental frequency laser is formed in the Raman resonant cavity. When the fundamental frequency laser passes through the Raman gain medium, the Raman gain medium generates stimulated Raman scattering so as to generate first-order Stokes light with the wavelength of 1666 nm. And the laser outputs 1666nm Raman laser after passing through the front cavity mirror of the Raman resonant cavity and the spectroscope. The Raman laser is compact in structure and high in efficiency, the maximum output power of 1.21 W is achieved and is the highest output power of a 1.6-micron Raman laser, and meanwhile the peak power of 8.96 kW is the highest Raman output peak power close to 1.6 microns.

Description

technical field [0001] The invention relates to the field of laser technology, in particular to a high-efficiency diode-pumped 1666 nm Raman laser. Background technique [0002] Solid-state lasers operating near the 1.6 μm eye-safe area have many important applications in laser medicine, differential absorption lidar, remote sensing, ranging, spectroscopy, and wavelength conversion. Traditionally, to generate lasers around 1.6 μm, work has focused on the development of resonantly pumped Er:YAG lasers. In addition, stimulated Raman scattering is another effective method to generate new laser wavelengths based on third-order nonlinear processes, but it is rarely reported. To our knowledge, only the 1.63 μm CVD-diamond Raman laser of Jelínek et al. V 3+ A passively Q-switched Nd:YAP laser with :YAG as a saturable absorber was used as a pump source at 1.34μm, and a Raman laser output energy of 47μJ with a pulse width of 6ns was obtained. [0003] The most commonly used Raman...

AI Technical Summary

Problems solved by technology

Previously, Nd-doped lasers at 1.06 μm and 1.3 μm were mainly used as pump sources, and besides the widely used stimulated radiation at 1.06 μm and 1.3 μm, other important stimulated radiation (such as 1.44 μm) has not been used to realize Fundamental wavelength of Raman laser

Images