Coherent light generators – Particular beam control device – Optical output stabilization
Patent
1997-07-09
1998-09-15
Scott, Jr., Leon
Coherent light generators
Particular beam control device
Optical output stabilization
372106, 372105, 372 99, 372 98, 372 45, 372 22, 372 5, H01S 313
Patent
active
058090487
ABSTRACT:
A short wavelength light source mainly comprises a semiconductor laser for pumping a laser medium, a birefringence filter for controlling or stabilizing the waveform by applying an optical feedback to the semiconductor laser to feed back only light of specific wavelength, lens systems for focusing the pumping light, and an optical resonator composed of a laser medium formed of Nd:YAG doped with 1% of Nd and a nonlinear optical element formed of KNbO.sub.3. The birefringence filter is structured as a Lyot filter, and is composed of a birefringence element made of 2 mm thick non-doped YVO.sub.4, a polarizer, and a birefringence element made of 4 mm thick non-doped YVO.sub.4.
This constitution realizes a short wavelength light source achieving a single longitudinal mode oscillation while maintaining a high output, small in size, superior in efficiency, and excellent in wavelength stability.
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Optics Letters, vol. 16, No. 10, May 15, 1991, pp. 732-734, "Electronically tunable single-mode ... laser" by J.R. Andrews.
"Stable and Efficient Green Light Generation by Intracavity Frequency Doubling of ND:YV04 Lasers" Applied Physics Letters, vol. 63, No. 3, Jul. 19, 1993, pp. 299-301, XP000382577.
"Electronically Tunable Single-Mode External-Cavity Diode Laser" Optics Letters, vol. 16, No. 10, May 15, 1991, pp. 732-734, XPOOO202054, J.R. Andrews.
"Efficient Intracavity Sum-Frequency Generation of 490-nm Radiation by Use of Potassium Niobate", Optics Letters, vol. 19, No. 14, Jul. 15, 1994, pp. 1022-1024, XOOOO455024.
Muro Kiyofumi
Shichijyo Shiro
Jr. Leon Scott
Mitsui Petrochemical Industries Ltd.
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