Methods of controlling a laser in a WDM application

Details Methods of controlling a laser in a WDM application Methods of controlling a laser in a WDM application

2005-03-22

2005-03-22

Harvey, MinSun (Department: 2828)

Coherent light generators

Particular beam control device

Having particular beam control circuit component

C372S029010, C372S031000

Reexamination Certificate

active

06870863

ABSTRACT:
A laser used in a DWDM optical-fiber application is controlled so that, before it is powered up or down, its output power is maximally attenuated, the result being minimal cross-channel interference due to out-of-spec. wavelength. Laser control is further characterized by the steps of: (a) with laser current at zero, establishing a desired temperature of operation of the laser; (b) with output attenuation at maximum, increasing the current and regulating it to a level at which the design operating wavelength is achieved, and (c) decreasing the attenuation until the desired output power to the optical-fiber link is attained. Maximum attenuation is preferably applied during step (a).

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