Semiconductor laser control system

Details Semiconductor laser control system Semiconductor laser control system

1999-03-18

2000-09-12

Davie, James W.

Coherent light generators

Particular beam control device

Having particular beam control circuit component

372 25, 372 26, H01S 310

Patent

active

061187984

ABSTRACT:
A pulse width modulation and intensity modulation signal generating unit, based on input data, performs pulse width modulation and intensity modulation and generates a light emission instruction signal. An error amplifier forms a negative feedback loop together with a semiconductor laser and a light reception device which monitors light output of the semiconductor laser, the error amplifier controlling forward current of the semiconductor laser so that a light reception signal proportional to the light output of the semiconductor laser is equal to the light emission instruction signal. A current driving unit causes a driving current, according to the light emission instruction signal, to flow through the semiconductor laser as the forward current thereof, the driving current being generated so as to control driving of the semiconductor laser with a current of the difference or sum with the control current of the negative feedback loop. The pulse width modulation nd intensity modulation signal generating unit, the error amplifier and the current driving unit are formed as one chip of an integrated circuit.

REFERENCES:
patent: 5036519 (1991-07-01), Ema et al.
patent: 5050177 (1991-09-01), Ema
patent: 5138623 (1992-08-01), Ema et al.
patent: 5237579 (1993-08-01), Ema et al.
patent: 5258780 (1993-11-01), Ema et al.
patent: 5325160 (1994-06-01), Imakawa et al.
patent: 5511087 (1996-04-01), Sato et al.
patent: 5604757 (1997-02-01), Liang et al.
patent: 5784091 (1998-07-01), Ema et al.

Affiliated with

Also associated with

Rating

Semiconductor laser control system 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 control system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Semiconductor laser control system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-102662