Optical transmitter suppressing wavelength deviation at...

Details Optical transmitter suppressing wavelength deviation at... Optical transmitter suppressing wavelength deviation at...

2008-03-10

2011-10-11

Curs, Nathan (Department: 2613)

Optical communications

Transmitter

Including compensation

C398S193000, C372S038010

Reexamination Certificate

active

08036540

ABSTRACT:
An optical transmitter is disclosed in which the wavelength deviation occurred at the turning on from the disabled state to the enabled state by the negating of the Tx_Disable command is suppressed. The optical transmitter includes a semiconductor laser diode (LD) and an automatic temperature controller (ATC) circuit to drive the thermo-electric cooler (TEC). When the transmitter receives the Tx_Disable to start up the operation of the LD, a pulsed signal is generated in synchronizing with the transition of the Tx_Disable signal to momentarily enhance the cooling capacity of the TEC in order to compensate the increase of the temperature of the LD by the self heating, which prevents the output wavelength of the transmitter from deviating.

REFERENCES:
patent: 5978395 (1999-11-01), Nomura
patent: 2003/0033819 (2003-02-01), Prescott
patent: 2004/0161248 (2004-08-01), Stewart et al.
patent: 2008/0047278 (2008-02-01), Saad et al.
patent: 2003-298524 (2003-10-01), None

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