Method and system for turning on an optical radiation source

Details Method and system for turning on an optical radiation source Method and system for turning on an optical radiation source

2005-06-28

2005-06-28

Paschall, Mark (Department: 3742)

Electric heating

Heating devices

With power supply and voltage or current regulation or...

C219S502000, C219S497000, C372S029020, C372S032000, C372S034000

Reexamination Certificate

active

06911629

ABSTRACT:
An optical communication module includes an optical radiation source as well as control circuitry to control the temperature and the power emitted by the optical source. In order to permit soft start-up of the source while avoiding undesired wavelength variations, the optical source is pre-heated before being caused to emit optical radiation. This may be effected by initially heating the optical source to an initial temperature using the thermoelectrical conditioner associated therewith as a heater and subsequently causing a partly under-threshold current to flow through the source, thus causing the source to be heated while still emitting negligible optical power.

REFERENCES:
patent: 5438579 (1995-08-01), Eda et al.
patent: 5463648 (1995-10-01), Gibbs
patent: 5825792 (1998-10-01), Villeneuve et al.
patent: 5982789 (1999-11-01), Marshall et al.

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