Coherent light generators – Particular beam control device – Optical output stabilization
Patent
1989-12-28
1991-08-27
Gonzalez, Frank
Coherent light generators
Particular beam control device
Optical output stabilization
372 33, 372 96, 385130, 385141, H01S 313
Patent
active
050439910
ABSTRACT:
The present invention proposes a dielectric waveguide formed on a substrate of ultra-low thermal expansion glass which is assembled with a commercially available diode laser to create a temperature stabilized laser. The waveguide comprises multiple dielectric films which have equal and opposite temperature induced changes in refractive index with respect to each other into which is formed a Bragg grating, the grooves of which are sufficiently shallow to allow penetration of light into the waveguide of 1 mm to 1 cm. This provides a signal which is both narrowband and frequency stable so that the optical signal can be guaranteed to remain in a given narrow frequency band. The dielectric layers are deposited using ion assisted deposition (IAD) to provide uniform, high density films with reduced index-temperature coefficients and increased density, resulting in a waveguide with near-zero temperature variations in refractive index. After fabrication, the waveguide is assembled to the diode laser, creating a temperature stabilized laser which operates within 1 .ANG. of the target wavelength over the temperature range from 20.degree. C. to 70.degree. C. In one embodiment a temperature stabilized laser is used to pump a Nd:YAG laser providing a stable, high power optical signal.
REFERENCES:
patent: 3891302 (1975-06-01), Dabby et al.
patent: 4464762 (1984-08-01), Furuya
patent: 4651322 (1987-03-01), Shimitzu et al.
patent: 4669086 (1987-05-01), Kaede et al.
patent: 4731795 (1988-03-01), Clark et al.
patent: 4803692 (1989-02-01), Sakano et al.
patent: 4914667 (1990-04-01), Blonder et al.
S. A. Gurevich, et al., Testing of a Bragg Heterojunction Injection Laser with a Thermally Stable Output Wavelength, Sov. Tech. Phys. Lett. 11(5), 5/85.
Zh.I. Alferov et al., Monolithically-Integrated Hybrid Heterostructure Diode Laser with Dielectric-Film Waveguide DBR, IEEE Journal of Quantum Electronics, vol. QE-23, No. 6, Jun. 1987.
J. M. Hammer et al., Single Wavelength Operation of the Hybrid-External Bragg-Reflector-Waveguide Laser Under Dynamic Conditions, Appl. Phys. Lett. 47, No. 3, pp. 183, Aug. 1, 1985.
General Dynamics Corp. Electronics Division
Gonzalez Frank
Morse Susan S.
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