Title :
High-power narrow-band operation and Raman frequency conversion of an electron-beam pumped krypton excimer laser
Author :
Kurosawa, Kou ; Sasaki, Wataru ; Fujiwara, Etsuo ; Kat, Yoshiaki
Author_Institution :
Dept. of Electron., Osaka Univ., Japan
Abstract :
A Kr excimer laser pumped by a relativistic electron beam has generated high-power output by using a cavity composed of a Si mirror and M/sub g/F/sub 2/ mirror. The threshold gas pressure for laser oscillation is 10 atm, and the maximum output power achieved so far is 6.6 MW at 15 atm. The maximum power is limited by the surface damages on the mirrors. This laser output, oscillating at 145.7 nm, has a spectral width of 0.8 nm (FWHM). Efficient spectral narrowing down to 0.1 nm has been achieved with a 32 degrees apex angle MgF/sub 2/ prism inserted in the cavity giving 3.5 MW peak power at 15 atm of Kr gas pressure. Wavelength conversion by stimulated Raman scattering in high-pressure H/sub 2/ has been demonstrated for efficient extension of the laser wavelength.<>
Keywords :
electron beams; excimer lasers; gas lasers; krypton; laser accessories; mirrors; optical frequency conversion; stimulated Raman scattering; 10 atm; 145.7 nm; 15 atm; 6.6 MW; FWHM; H/sub 2/; Kr; MgF/sub 2/ mirror; Raman frequency conversion; Si mirror; excimer laser; laser oscillation; prism; relativistic electron beam; spectral width; stimulated Raman scattering; surface damages; Electron beams; Frequency conversion; Gas lasers; Laser excitation; Mirrors; Narrowband; Power generation; Power lasers; Pump lasers; Raman scattering;
Journal_Title :
Quantum Electronics, IEEE Journal of
