Coherent light generators – Particular beam control device – Optical output stabilization
Patent
1997-08-25
1999-11-02
Davie, James W.
Coherent light generators
Particular beam control device
Optical output stabilization
372 38, H01S 310
Patent
active
059783931
ABSTRACT:
A laser diode power controller, and method, are disclosed. The controller can be implemented entirely in CMOS technology due to the simplicity of its quasi-decision-based control routines. The control routines involve the use of a window comparator which determines whether the measured power level of a laser diode falls within a desired range of values. The simplified control routines are also manifested by the use of digital registers to set the desired current values that are to be output to the laser diode and monitor diode. The modulation current supplied to the laser diode exhibits much lower noise levels because the modulation digital to analog converter (DAC) By supplying a continuous current that is selectively switched between the laser diode and a dummy load, much less noise is induced in the power supply than if it had to respond to large changes in modulation current, i.e., OFF (zero) and ON (desired Imod).
REFERENCES:
patent: 4995105 (1991-02-01), Wechsler
patent: 5170403 (1992-12-01), Mayer
patent: 5216682 (1993-06-01), Hedberg
patent: 5255276 (1993-10-01), Tabuchi et al.
patent: 5297157 (1994-03-01), Kaiser et al.
patent: 5313482 (1994-05-01), Zelenka et al.
patent: 5317578 (1994-05-01), Ogou
patent: 5383208 (1995-01-01), Queniat et al.
patent: 5397933 (1995-03-01), Yamada
patent: 5467363 (1995-11-01), Okabayashi
patent: 5579328 (1996-11-01), Habel et al.
patent: 5589786 (1996-12-01), Bella et al.
patent: 5604757 (1997-02-01), Liang et al.
patent: 5832012 (1998-11-01), Araki et al.
Current Sourcing and On-Chip Amplifers Sharpen Laser Diode Driver's Design Edge (AD0660), IC features 200 MHz ouput switching and 1.5 ns rise time, Norwood, Mass (Dec. 7, 1995.
IBM Technical Disclosure Bulletin, vol. 37 No. 02A, Feb. 1994, Temperature and Aging Compensation of Laser Drive Circuits, IBM Corp 1994, pp. 279-280.
A Laser Control Chip Combing a Power Regulator and a 622-MBit/s Modulator, Christian Olgaard, Student Member, IEEE, IEEE log No. 9402151, Journal of Solid-State Circuits vol. 29 No. 8, Aug. 1994 pp. 947-951.
Childers John
Feldman Michael R.
Kiamilev Fouad
Davie James W.
Digital Optics Corporation
LandOfFree
Laser diode power output controller and method thereof does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Laser diode power output controller and method thereof, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Laser diode power output controller and method thereof will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2145635