Blue-green upconversion laser

Details Blue-green upconversion laser Blue-green upconversion laser

1989-08-25

1990-08-14

Sikes, William L.

Coherent light generators

Particular active media

Insulating crystal

H01S 316

Patent

active

049493485

ABSTRACT:
A blue-green laser (450-550 nm) uses a host crystal doped with Tm.sup.3+. The Tm.sup.+ is excited through upconversion by a red pumping laser and an IR pumping laser to a state which transitions to a relatively lower energy level through emissions in the blue-green band, e.g., 450.20 nm at 75 K. The exciting laser may be tunable dye lasers or may be solid-state semiconductor laser, e.g., GaAlAs and InGaAlP.

REFERENCES:
patent: 4054852 (1977-10-01), Nicolai
patent: 4347485 (1982-08-01), Esterowitz et al.
patent: 4386428 (1983-05-01), Baer
patent: 4825444 (1989-04-01), Johna et al.
T. Y. Fan et al., "Diode Laser-Pumped Solid-State Lasers", 24 IEEE J. Quam Electron., No. 6, pp. 895-947, (Jun. 1988).
A. J. Silversmith et al., "Green Infrared-Pumped Erbium Upconversion Laser," 51 Appl. Phys. Lett. No. 24, pp. 1977-1979.
H. Okuda et al., "Highly Reliable InGaP/InGaAlP Visible Light Emitting Inner Stripe Lasers with 667 nm Lasing Wavelength," 25 IEEE J. Quantum Electron., No. 6, pp. 1477-1482, (Jun. 1989).

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