Square wave modulation circuit for laser diode

Details Square wave modulation circuit for laser diode Square wave modulation circuit for laser diode

1988-02-08

1989-05-02

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

372 29, 372 38, H01S 313

Patent

active

048271160

ABSTRACT:
A laser diode square wave modulation circuit includes a sample/hold circuit, a smoothing circuit and a laser driver with devices for regulating its output power. The sample/hold circuit maintains the signal to modulate free from square component even when a feedback loop to regulate the laser output applies a square wave to it.

REFERENCES:
patent: 4611352 (1986-09-01), Fujitoet al.
patent: 4689795 (1987-08-01), Yoshimoto et al.
patent: 4709369 (1987-11-01), Howard
patent: 4745609 (1988-05-01), Yoshikawa
patent: 4768198 (1988-08-01), Deki
patent: 4771431 (1988-09-01), Nakazawa et al.

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