Optical signal transmitter having an apc circuit with automatic

Details Optical signal transmitter having an apc circuit with automatic Optical signal transmitter having an apc circuit with automatic

1994-09-09

1996-09-17

Boudreau, Leo

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359180, 359162, 372 38, H04B 1004

Patent

active

055574459

ABSTRACT:
An optical signal transmitter has a laser diode, and an automatic bias current control circuit by which the relation between a light output of the laser diode, a threshold current and bias current are kept constant. The automatic bias current control circuit includes a circuit for modulating a bias current of the laser diode in amplitude with a signal of frequency f1, which is lower than that of the input signal, and a circuit for detecting the signal component of the frequency f1 included in the light output of the laser diode and controlling so as that a detected output becomes a fixed value.

REFERENCES:
patent: 4471494 (1984-09-01), Keil et al.
patent: 4504976 (1985-03-01), Beaudet
patent: 4995045 (1991-02-01), Burley et al.
patent: 5153765 (1992-10-01), Grunziger
patent: 5373387 (1994-12-01), Bosch et al.

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