Power laser with uncoated diamond window

Details Power laser with uncoated diamond window Power laser with uncoated diamond window

1993-02-17

1994-08-02

Epps, Georgia Y.

Coherent light generators

Particular resonant cavity

Specified cavity component

372 55, 372 56, 372 34, 372 92, H01S 308

Patent

active

053352459

ABSTRACT:
A power laser has a cavity (2) delimited at its opposite ends by a first partially transmitting window (3) and a second reflecting window ( 4). The first window (3) is constituted by at least one diamond wafer (5) with uncoated flat parallel surfaces, having a controlled thickness whose variations do not exceed 0.2 micron. The diamond wafer (5; 6) is mounted in an annular support (9; 10) of material which is a good heat conductor and is provided with a cooler (11; 12). The window (3) can comprise two parallel wafers (5.sub.A, 5.sub.B) of diamond separated by a calibrated distance (14) which is an uneven multiple of .lambda./4n, .lambda. being the laser wavelength and n the index of refraction of the medium between the wafers. Or the second window (4) can also be constituted by a diamond wafer (6) with a reflective metallic coating (60). A sweeping gas can be blown over the internal surface of at least one of the windows.

REFERENCES:
patent: 3895313 (1975-07-01), Seitz
patent: 4536442 (1985-08-01), Bovenkerk et al.
"Diamond as a High-Power-Laser Window", Journal of the Optical Society of America, vol. 64, No. 1, Jan. 1974, by D. H. Douglas-Hamilton et al., pp. 36-38.
"Performance Characteristics of Single Point Diamond Machined Metal Mirrors for Infrared Laser Applications", Applied Optics, vol. 13, No. 11, Nov. 1974, by T. T. Saito et al., pp. 2647-2650.

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