Coherent light generators – Particular temperature control
Reexamination Certificate
2005-04-12
2005-04-12
Harvey, Minsun Oh (Department: 2828)
Coherent light generators
Particular temperature control
C372S033000, C372S036000
Reexamination Certificate
active
06879607
ABSTRACT:
A problem of the present invention is to provide a semiconductor laser module for making precise temperature control possible.A semiconductor laser module1according to the present invention has a Peltier element4, a thermistor5for detecting the temperature of the Peltier element4, and a differential amplification circuit6for generating a control signal according to the detection signal from the thermistor5so that the surface temperature of the Peltier element4conforms to a set temperature. A parallel compensating circuit12for generating a compensating signal for compensating for a delay in temperature variation in the Peltier element4with respect to the input of current signal to the Peltier element4branches and is connected to the output portion of the differential amplification circuit6. The compensating signal is sent to an addition circuit9and detection correction signal obtained by adding the detection signal of the thermistor5and the compensating signal is generated. The detection correction signal is sent to the differential amplification circuit6and a control signal corresponding to the difference between the detection correction signal and a signal corresponding to set temperature is generated.
REFERENCES:
patent: 4884279 (1989-11-01), Odagiri
patent: 6097743 (2000-08-01), Alphonse
patent: 6212210 (2001-04-01), Serizawa
patent: 6291813 (2001-09-01), Ackerman et al.
patent: 6501774 (2002-12-01), Kuwahara et al.
patent: 6556345 (2003-04-01), Gassner et al.
patent: 0 762 568 (1997-03-01), None
patent: 2-148780 (1990-06-01), None
patent: 7-170005 (1995-07-01), None
patent: 7-248701 (1995-09-01), None
patent: 10-284791 (1998-10-01), None
Hayashi Shigeo
Ichino Moriyasu
Nishie Mitsuaki
Harvey Minsun Oh
Nguyen Phillip
NTT Electronics Corporation
LandOfFree
Semiconductor laser module does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Semiconductor laser module, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Semiconductor laser module will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3403688