Optical module, transmitter and WDM transmitting device

Details Optical module, transmitter and WDM transmitting device Optical module, transmitter and WDM transmitting device

2005-02-15

2005-02-15

Wong, Don (Department: 2821)

Coherent light generators

Particular temperature control

Reexamination Certificate

active

06856633

ABSTRACT:
A transmitting device includes a light-emitting device for outputting a laser beam, a temperature regulator for regulating the temperature in the light-emitting device, a wavelength monitor device for receiving the laser beam from the light-emitting device after it has passed through a optical filter thermally coupled with the light-emitting device, a control unit for controlling the temperature in the temperature regulator based on the signal outputted from the wavelength monitor device such that the lasing wavelength in the laser beam outputted from the light-emitting device will be locked at a predetermined locked wavelength, a temperature-sensing unit for sensing the temperature in the optical filter, and a correcting unit for outputting a correction signal toward the control unit based on the temperature sensed by the temperature-sensing unit, the correction signal being operative to command the correction of any deviation in the locked wavelength associated with the temperature characteristic in the optical filter. The light-emitting device, wavelength monitor device, temperature regulator and optical fiber together define an optical module.

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Villeneuve et al., “High-stability wavelength-controlled DFB-laser sources for dense WDM applications,” Optical Fiber Communication (OFC) conference Technical Digest, Mar. 20, 2001.
Tatsuno et al., “50GHz spacing, multi-wavelength tunable locker integrated in a transmitter module with a monolithic-modulator and a DFB-laser,” OFC Technical Digest TuB5-1, Mar. 20, 2001.
Adams et al., “Module-packaged tunable laser and wavelength locker delivering 40mW of fibre-coupled power on 34 channels,” Electronics Letters vol. 37, No. 11, 691-692, 24thMay, 2001.

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