Coherent light generators – Particular active media – Gas
Patent
1988-09-29
1989-09-12
Davie, James W.
Coherent light generators
Particular active media
Gas
372 61, H01S 314, H01S 303
Patent
active
048667250
ABSTRACT:
A metal vapor laser device which prevents a possible discharge between an electrode and a pressure detector thereof and can generate a laser beam in a stabilized condition. The metal vapor laser device comprises a metal vapor laser tube, a carrier gas supplier, and a pressure detector. The carrier gas supplier communicates with a discharge spacing within the laser tube by way of a communicating hole formed at an end portion thereof. The pressure detector includes a tube defining a pressure detecting chamber therein and communicating with the inside of the carrier gas supplier, and an energizable detecting element provided in the inside of the pressure detecting chamber. A discharge preventing thin tube is provided in the inside of the carrier gas supplier and has an end connected to the end portion of the carrier gas supplier in such a manner as to surround the communicating hole of the carrier gas supplier. The discharge preventing thin tube extends toward the other end portion of the carrier gas supplier farther than a connecting portion of the carrier gas supplier to the pressure detector, and the other end thereof is opened within the carrier gas supplier.
REFERENCES:
patent: 4232274 (1980-11-01), Tokudome et al.
Dowley, SPIE vol. 741, Design of Optical Systems Incorporating Low Power Laser, 1987, pp. 31-38.
Kamide et al, "He-Cd Laser of Long Life and Low Noise", Laser Research, vol. 8, No. 2, 1980, pp. 65-72.
Deki Kyoichi
Hata Hiroshige
Sugioka Shinji
Yoshioka Masaki
Davie James W.
Ushio Denki Kabushiki Kaisha
Ziems Robert F.
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