Etalon and single longitudinal mode laser

Details Etalon and single longitudinal mode laser Etalon and single longitudinal mode laser

1997-06-17

1999-08-03

Lee, John D.

Coherent light generators

Particular beam control device

Mode discrimination

372 98, H01S 3098

Patent

active

059334398

ABSTRACT:
An etalon is disposed in a resonator of a laser to make the laser oscillate in a single longitudinal mode. Opposite end faces of the etalon through which light travels are provided with coating by ion-assisted deposition to prevent output fluctuations of the laser due to changes in environmental moisture and/or aging of the laser. Preferably the coating is of HfO.sub.2 and SiO.sub.2. In accordance with a second aspect of the present invention, there is provided a single longitudinal mode laser comprising a resonator and an etalon which is disposed in the resonator to make the laser oscillate in a single longitudinal mode, wherein the improvement comprises that opposite end faces of the etalon through which light travels are provided with coating by ion-assisted deposition. Further, the resonator may be contained in an airtight casing.

REFERENCES:
patent: 4756606 (1988-07-01), Jewell et al.
patent: 4797893 (1989-01-01), Dixon
patent: 4995048 (1991-02-01), Kuindersma et al.
patent: 5278851 (1994-01-01), Goto
patent: 5298351 (1994-03-01), Bobroff et al.
patent: 5583683 (1996-12-01), Scobey
patent: 5657341 (1997-08-01), Hyuga
"Optic Letters" vol. 18 (Mar. 1993) pp. 420-422, C.S. Adams et al, "Single-Frequency Operation of a Diode-Pumped Lanthanum-Neodymium-Hexaaluminate Laser By . . . ".

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