Optical communications – Transmitter – Including compensation
Reexamination Certificate
2006-09-12
2006-09-12
Leung, Christina Y. (Department: 2613)
Optical communications
Transmitter
Including compensation
C398S095000, C372S032000
Reexamination Certificate
active
07106978
ABSTRACT:
An optical module according to the present invention includes: a light-emitting device that outputs laser light; a temperature adjustment unit that adjusts a wavelength of the laser light outputted from the light-emitting device so as to be locked at a predetermined wavelength; a wavelength monitor unit that receives laser light outputted from the light-emitting device by allowing the laser light to pass through an optical filter provided above the temperature adjustment unit and monitors the wavelength thereof; a package for sealing the light-emitting device, the temperature adjustment unit, and the wavelength monitor unit into the inside thereof; and a package temperature detection unit for detecting a temperature of the package, in which the temperature adjustment unit adjusts an oscillation wavelength of the laser light outputted from the light-emitting device to the predetermined lock wavelength based on a signal outputted from the wavelength monitor unit, and a signal from the package temperature detection unit is used to correct the lock wavelength shift caused by temperature characteristics of the optical filter by estimating the optical filter temperature based on the detected package temperature.
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Imai Kumiko
Nasu Hideyuki
Nomura Takehiko
Leung Christina Y.
The Furukawa Electric Co. Ltd.
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