Designing of Raman laser

In this work, we describe the design of the Raman laser pumped by Frequency doubled Nd-YAG laser (λ=532 nm) to generate new laser wavelengths by shifting the frequency of the Nd-YAG laser to Stokes region (λ1=683 nm, λ2=953.6 nm, λ3=1579.5 nm) and Antistokes region (λ'1=435 nm, λ'2=369.9 nm, λ' 3=319.8 nm). Laser resonator has been designed to increase the laser gain. It consists of two mirrors, the back mirror transmits the pump laser beam (λ=532 nm) through the Raman tube and reflects all other generated Raman laser lines. Four special front mirrors were made to be used for the four laser lines λ1=683 nm, λ2=953.6 nm and λ'1=435 nm, λ'2=369.9 nm. The output energy for the lines υ1s, υ2s, υ1as,υ2as was measured. The output energy of the Raman laser was characterized for different H2 pressure inside the tube. (Author)