Coherent light generators – Particular active media – Gas
Patent
1989-10-27
1992-06-30
Gonzalez, Frank
Coherent light generators
Particular active media
Gas
372 94, 315110, H01S 322
Patent
active
051270161
ABSTRACT:
The life expectancy of a ring laser gyroscope has been greatly extended by the addition of a gas capsule (24) which holds a large quantity of lasing gas at high pressure in a very small volume. The gas is selectively admitted to the triangular tunnel (12) through a membrane (32). In a preferred embodiment, permeability of the membrane (32) varies with temperature and a platinum heating element (36) is deposited on the membrane (32) for the purpose of regulating the diffusion of the lasing gas through the membrane. A pressure sensor (44) is connected to the triangular tunnel (12) for sensing a decrease in lasing gas pressure therein. A servo control (46) utilizes information supplied by the pressure sensor (44) to regulate the energization of the heating element (36). In one arrangement, a silicon substrate (50) is common to both the pressure sensor (46) and the gas capsule (24). In a second embodiment of the invention, permeability of the membrane (60) is continuous and uncontrolled wherein regulation of the diffusion rate is achieved by controlling the composition and dimensions of the membrane (210 or 212).
REFERENCES:
patent: 3390606 (1978-07-01), Podgorski
patent: 3641455 (1972-02-01), Matovich
patent: 3876957 (1975-04-01), Thatcher
patent: 4257015 (1981-03-01), Ljung
patent: 4481635 (1984-11-01), Broberg et al.
patent: 4740985 (1988-04-01), Podgorski
Gonzalez Frank
Honeywell Inc.
Morse Susan S.
Pajak Robert A.
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