Coherent light generators – Particular active media
Patent
1991-01-10
1992-02-18
Scott, Jr., Leon
Coherent light generators
Particular active media
372 27, 372 97, 372 99, 372 69, H01S 314
Patent
active
050900196
ABSTRACT:
A low threshold resonator for an alexandrite laser receives a 680 nm pumping beam from at least one laser pump to provide alexandrite laser emission at around 751 nm. An alexandrite crystal or rod receives the 680 nm beam and has an exterior face provided with a dichroic coating highly transmissive to the 680 nm beam and highly reflective to the 751 nm emission and has an interior face provided with an AR coating antireflective to the 751 nm emission. A mirror, provided with a HR coating that is highly reflective to the 751 nm emission, has an appropriate radius of curvature and is appropriately spaced from the exterior face of the alexandrite rod to focus reflected 751 nm emission in a resonator mode on the exterior face of the alexandrite rod to assure low threshold pumping thereof. The mirror has a radius of curvature which is the same as the spacing between the exterior face of the alexandrite rod and the mirror to focus the reflected emission in the resonator mode in a spot size on the exterior face. A lens is disposed to receive the pumping beam to focus it on the spot size on the exterior face of the alexandrite rod. The lens, the alexandrite rod and the mirror are appropriately configured and predeterminably spaced with respect to each other to assure that mode matching of the lens expands at exactly the same rate as the resonator mode to assure low threshold pumping thereof.
REFERENCES:
patent: 3997853 (1976-12-01), Morris et al.
patent: 4464759 (1984-08-01), Haus et al.
patent: 4653056 (1987-03-01), Baer et al.
patent: 4748632 (1988-05-01), Preston
patent: 4791927 (1988-12-01), Menger
patent: 4794615 (1988-12-01), Berger
patent: 4809283 (1989-02-01), Harter
patent: 4811349 (1989-03-01), Payne et al.
patent: 4852567 (1989-08-01), Sinofsky
patent: 4884281 (1989-11-01), Hawthorn et al.
patent: 4901330 (1990-02-01), Wolfram
patent: 4922502 (1990-05-01), Unternahrer et al.
patent: 4942582 (1990-07-01), Kintz et al.
Scheps, Richard et al, "Laser Diode-Pumped Tunable Solid State Laser", Predings Reprint, SPIE, vol. 1223, pp. 189-195, 15-17 Jan. 1990.
Scheps, Richard et al, "Alexandrite Laser Pumped by Semiconductor Lasers", Appl. Phys. Lett., 56, 4 Jun. 1990.
Scheps, R., "Efficient Laser Diode Pumped Nd Lasers", Appl. Opt. 28, pp. 89-91, Jan. 1989.
Walling, J. C. et al, "Tunable Alexandrite Lasers", IEEE J. Quant. Electron, QE-16, pp. 1302-1315, Dec. 1980.
Kumagi, O. et al, "680 nm AlGaInP Visible Lasers Grown by MOCVD", Proceedings of the SPIE, L. E. Cramer et al editors, vol. 898, pp. 80-83, SPIE Billingham, 1988.
Findlay, D. et al, "The Measurement of Internal Losses in Four-Level Lasers", Phys. Lett. 20, pp. 277-278, Feb. 1966.
Koechner, W., Solid-State Laser Engineering, pp. 1-122, Springer-Verlag, New York, 1976.
Fendelman Harvey
Jr. Leon Scott
Keough Thomas Glenn
The United States of America as represented by the Secretary of
LandOfFree
Laser diode-pumped tunable solid state laser does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Laser diode-pumped tunable solid state laser, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Laser diode-pumped tunable solid state laser will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1829232