Coherent light generators – Particular resonant cavity – Specified cavity component
Patent
1990-01-24
1991-10-08
Scott, Jr., Leon
Coherent light generators
Particular resonant cavity
Specified cavity component
372108, 372107, 372 41, 372 34, 372 20, H01S 308
Patent
active
050561030
ABSTRACT:
Alignment of a birefringent device characterized by a first face and a second face cut at Brewster's angle so that a plane of polarization is defined. The optical device is secured in the optical path by a rotatable member having an axis of rotation that is normal to the Brewster faces of the optical device. Coupled with the rotatable member on the axis of rotation is a support allowing adjustment of the angular position about the axis of rotation of the rotatable member. An operator adjusts the angular position of the rotatable member until the C-axis lies in the plane of polarization. Even though the C-axis may not be parallel to the direction of polarization, the depolarization effects of the misalignment are eliminated by proper adjustment of the angular position relative to the plane of polarization. A tunable, solid state laser using the alignment apparatus with a birefringent filter achieves greater linear tuning range.
REFERENCES:
patent: 4894831 (1990-01-01), Alfrey
Arnold L. Bloom, "Modes of a Laser Resonator Containing Tilted Birefringent Plates," Journal of the Optical Society of America, vol. 64, No. 4, Apr. 1974.
Preuss et al., "Three-Stage Birefringent Filter Turning Smoothly Over the Visible Region:Theoretic Treatment and Experimental Design," Applied Optics, vol. 19, No. 5, Mar. 1, 1980.
Holtom et al., "Design of a Birefringent Filter for High-Power Dye Lasers" IEEE Journal of Quantum Electronics, vol. QE-10, No. 8, Aug. 1974.
Mudare et al., "Simple Alignment Procedure for the Assembly of Three-Plate Birefringent Filters for Tumble Dye Lasers," Applied Optics, vol. 22, No. 5, Mar. 1983.
November et al., "Derivation of the Universal Wavelength Tuning Formula for a Lyot Birefringent Filter," Applied Optics, vol. 23, No. 14, Jul. 15, 1984.
Peter A. Schulz, "Single-Frequency Ti:Al.sub.2 O.sub.3 Ring Laser," IEEE Journal of Quantum Electronics, vol . 24, No. 6, Jun. 1988.
Alfrey Anthony J.
Palmer James A.
Jr. Leon Scott
Spectra--Physics Lasers, Inc.
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