Self-collimated unstable resonator semiconductor laser

Details Self-collimated unstable resonator semiconductor laser Self-collimated unstable resonator semiconductor laser

1991-08-28

1993-01-12

Lee, John D.

Coherent light generators

Particular resonant cavity

Unstable resonator

H01S 308

Patent

active

051795680

ABSTRACT:
Self-collimation of the output is achieved in an unstable resonator semiconductor laser by providing a large concave mirror M.sub.1 and a small convex mirror M.sub.2 on opposite surfaces of a semiconductor body of a material having an effective index of refraction denoted by n, where the respective mirror radii R.sub.1, R.sub.2 and beam radii r.sub.1, r.sub.2 are chosen to satisfy a condition ##EQU1## with a value of geometric magnification ##EQU2## where r.sub.1 and r.sub.2 are the radii of counterpropagating beams at respective mirrors of radii R.sub.1 and R.sub.2.

REFERENCES:
patent: 4553244 (1985-11-01), Benedict et al.
patent: 4769614 (1988-09-01), Oughstun
patent: 5058123 (1991-10-01), Yasui et al.
A. E. Siegman, "Unstable Optical Resonators for Laser Applications," Proceedings of the IEEE, 53, pp. 277-287, Mar. 1965.
M. L. Tilton, et al., "High Power, Nearly Diffraction-Limited Output from a Semiconductor Laser with an Unstable Resonator," Conf. on Lasers and ElectroOptics, Washington, D.C. Jan. 1991.
R. J. Lang, et al., "Unstable resonator semiconductor lasers-Part 1: Theory," IEE Proceedings, vol. 134, Pt. J, No. 1, pp. 69-75, Feb. 1987.
J. Salzman, et al., "Unstable resonator semiconductor lasers-Part 2: Experiment," IEE Proceedings, vol. 134, Pt. J, No. 1, pp. 76-86 Feb. 1987.
J. Salzman, et al., "Confocal unstable-resonator semiconductor laser," Optics Letters, vol. 11, No. 8, pp. 507-509, Aug. 1986.
A. P. Bogatov, et al., "Injection laser with an unstable resonator," Sov. J. Quantum Electron., 10, pp. 630-622, Jan. 1970.

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