Coherent light generators – Particular component circuitry – Optical pumping
Patent
1998-02-13
2000-06-06
Lee, John D.
Coherent light generators
Particular component circuitry
Optical pumping
372 43, H01S 3096
Patent
active
060728167
ABSTRACT:
A laser-diode drive circuit which maintains the speed of an optical output power waveform even if the pulsed current waveform of the laser diode changes. The laser diode drive circuit includes a differential transistor pair whose emitted electrodes are connected together, emitter-follower transistors for driving the differential transistor pair, a bias current supply transistor for supplying the laser diode with a bias current, a current source transistor serving as the current source of the differential transistor pair, and an automatic power control circuit. The collector electrode of one of the transistors of the differential transistor pair is connected to both the collector electrode of the bias current supply transistor and the cathode electrode of the laser diode. Current control transistors are provided for setting the currents of the emitter-follower transistors. The bias current supply transistor, the current source transistor and the base electrodes of the first and second current control transistors are connected to the control voltage output of the automatic power control circuit.
REFERENCES:
patent: 4243952 (1981-01-01), Patterson
patent: 4484331 (1984-11-01), Miller
patent: 4594717 (1986-06-01), Bracht et al.
patent: 4683573 (1987-07-01), Albanese
patent: 5043992 (1991-08-01), Royer et al.
patent: 5315606 (1994-05-01), Tanaka
patent: 5651017 (1997-07-01), Genovese
patent: 5736844 (1998-04-01), Yanagisawa
patent: 5761230 (1998-06-01), Oono et al.
patent: 5793786 (1998-08-01), Furumiya
Lee John D.
NEC Corporation
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