Patent ID: 7106978

Claim:
An optical module comprising: a light-emitting device configured to output laser light; a wavelength adjustment unit configured to adjust a wavelength of the laser light outputted from the light-emitting device so as to be within a predetermined wavelength; a wavelength monitor unit configured to monitor the wavelength of the laser light outputted from the light-emitting device by receiving the laser light passed through an optical filter; a package configured to accommodate the light-emitting device, the wavelength adjustment unit, and the wavelength monitor unit therein; and a package temperature detection unit configured to detect a temperature of the package, wherein the wavelength adjustment unit is configured to adjust a light-emission wavelength of the light-emitting device so as to be within the predetermined wavelength range based on a signal outputted from the wavelength monitor unit, and wherein a signal from the package temperature detection unit is configured to correct the wavelength shift of the laser light caused by a temperature characteristic of the optical filter by estimating a temperature of the optical filter based on the detected temperature of the package.