Adjustable athermal package for optical fiber devices

Details Adjustable athermal package for optical fiber devices Adjustable athermal package for optical fiber devices

G - Physics

02

B

G02B 6/00 (2006.01) G02B 5/18 (2006.01) G02B 26/00 (2006.01)

Patent

CA 2357242

An athermally packaged optical fiber device, such as a Bragg grating, is provided. The device includes a hollow structure, and a free and a threaded member projecting in the hollow structure from both ends. The optical fiber is mounted in tension inside the hollow structure through longitudinal fiber- receiving bores in both members, and has an anchor point affixed to each member with the grating therebetween. The anchor point of the threaded member is provided outside of the hollow structure, making the device more compact. The free and threaded members are rotatable together to adjust the resonant wavelength of the grating, and a nut may be provided to allow a fine-tuning. The hollow structure, free member and threaded member have a coefficient of thermal expansion selected so that they together compensate for the temperature dependency of the Bragg wavelength.

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