Coherent light generators – Particular active media – Gas
Reexamination Certificate
2007-11-06
2007-11-06
Harvey, Minsun (Department: 2828)
Coherent light generators
Particular active media
Gas
C219S121610, C219S121620
Reexamination Certificate
active
11054052
ABSTRACT:
Systems and methods for stabilizing a CO2laser are disclosed. The system includes a detector unit for measuring the power in a select portion of the output beam. The detector unit generates an electrical signal corresponding to the measured power. The modulation frequency of the signal used to modulate the relatively high-frequency radio-frequency (RF) pump signal is filtered from the electrical signal. The filtered electrical signal is then compared to a desired value for the output power in the output beam. Based on the comparison, a modulation control signal for modulating the RF pump signal is formed. The modulation control signal has a varying duty cycle that varies the amount of laser pump power to reduce or eliminate the measured variations in the output beam power. The result is an output beam power that remains stable over time.
REFERENCES:
patent: 6747245 (2004-06-01), Talwar et al.
patent: 2002/0185474 (2002-12-01), Dunsky et al.
patent: 2006/0000812 (2006-01-01), Weber et al.
Grek Boris
Landau Igor
Weitzel Michael
Golub Marcia A.
Harvey Minsun
Jones Allston L.
Ultratech, Inc.
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