Optical limiter

Details Optical limiter Optical limiter

1983-06-10

1986-12-30

Scott, Jr., Leon

Coherent light generators

Particular beam control device

Control of pulse characteristics

372 11, 372 41, H01S 310

Patent

active

046334750

ABSTRACT:
An optical device that stabilizes the power in a cw laser beam comprises a material whose absorption coefficient increases with increasing incident intensity. The same device acts as an energy limiter and pulse shortener for a pulsed laser. In either case, the device can be located either within the laser cavity or outside it. Materials suitable for use in the device include Cr-doped crystalline solids and organic solutions, such as laser dyes, saturable absorber dyes, etc.

REFERENCES:
patent: 3997853 (1976-12-01), Morris et al.
patent: 4272733 (1981-06-01), Walling et al.
patent: 4403323 (1983-09-01), Nicolai
patent: 4479223 (1984-10-01), Fletcher et al.
R. H. Pantell et al., Appl. Phys. Lett. 11, 213, (1967) "Laser Power Stabilization By Means of Nonlinear Absorption".
S. A. Krysanov et al., Chem. Phys. Lett. 91, 77, (1982) "Ultrafast Formation of Transients In Spiropyran Photochromism".
J. Schwartz et al., Appl. Phys. Lett. 11, 242, (1967), (see also, A. Hordvik, IEEE J. Quantum Electron. QE-6, 199, (1970) "Effects of Internal Induced Absorption On Laser Emission" and Pulse Stretching Utilizing Two-Photon-Iduced Light Absorption.
M. L. Shand et al., J. Appl. Phys. 52, 953, (1981) "Excited-state Absorption In The Pump Region Of Alexandrite".

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