1 August 2009 Using backward Raman scattering from coupled deuterium cells for wavelength shifting
Author Affiliations +
Optical Engineering, 48(8), 084302 (2009). doi:10.1117/1.3204230
Measurements and simulations of a dual gas-cell system, which uses Raman scattering to convert infrared laser radiation from 1064 to 1560 nm, are presented. The cells contain deuterium at a pressure of ~25 atm. A beamsplitter is used to distribute the energy from the YAG laser between the seed and pump cells. The laser light is focused into the seed cell, which generates a lower-power, backward-propagating, pulse. This seed pulse and a laser pulse counterpropagate in the pump cell to generate a stronger 1560-nm pulse. The goal is to create a single pulse without any shorter pulses or oscillations. Simulation results are presented, which indicate that a beamsplitter directing 25% of the laser energy into the seed cell and the rest into the pump cell is optimal for 1560-nm generation. Laboratory testing of a dual-cell system using a 32% beamsplitter shows the generation of a 1560-nm pulse with 250 mJ/pulse with an efficiency of 35%.
William P. Hooper, Glendon M. Frick, Benjamiin P. Michael, "Using backward Raman scattering from coupled deuterium cells for wavelength shifting," Optical Engineering 48(8), 084302 (1 August 2009). https://doi.org/10.1117/1.3204230

Raman scattering

Laser scattering


Raman spectroscopy

Beam splitters

Pulsed laser operation

Optical simulations

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