Optical filter, laser module, and wavelength locker module

Details Optical filter, laser module, and wavelength locker module Optical filter, laser module, and wavelength locker module

G - Physics

02

B

G02B 5/20 (2006.01) H01S 3/098 (2006.01) H01S 5/065 (2006.01) H01S 5/0687 (2006.01) H01S 5/022 (2006.01)

Patent

CA 2405651

On a second thermo-module there are disposed a prism, an optical filter, and a sub-mount, via a base respectively. On the front side of the sub-mount, there are disposed a first photodetector and a second photodetector. The optical filter is structured with a crystal member that satisfies a condition that .alpha. + (1/n0) x (.DELTA.n/.DELTA.T) becomes not more than 3.5, where .alpha. is a coefficient of linear expansion, no is a refractive index at a normal temperature, and On is a change of a refractive index corresponding to a temperature variation .alpha.T.

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