Offset stabilization of wide dynamic range injection laser diode

Details Offset stabilization of wide dynamic range injection laser diode Offset stabilization of wide dynamic range injection laser diode

1994-11-23

1996-04-09

Scott, Jr., Leon

Coherent light generators

Particular beam control device

Having particular beam control circuit component

372 38, H01S 313

Patent

active

055068537

ABSTRACT:
A laser driver for an injection laser diode (ILD) has a stable power offset. The laser driver drives a laser having an optical power output that includes (a) a variable portion for providing signals and (b) a power offset that is desirably stable. The power offset may be stabilized by providing a stable input reference to the laser driver during an interval of operation when the laser is not providing signals, the input reference providing an optical power output from the laser that is approximately the same as the power offset. The laser output generated by the input reference may be compared to a predetermined reference voltage in order to provide an error correction signal, which may be a single bit. The error correction signal may be fed back to an input to the laser to correct the power offset.

REFERENCES:
patent: 5163063 (1992-09-01), Yoshikawa et al.
patent: 5276697 (1994-01-01), Davis
patent: 5412677 (1995-05-01), Guerin et al.
patent: 5414280 (1995-05-01), Girmay
patent: 5418806 (1995-05-01), Araki

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