Tunable optical fiber grating package with low temperature dependency

摘要

A tunable optical fiber grating package with a supporting assembly and an optical fiber portion having at least one grating between a first end and a second end of the fiber portion is provided. The first end and the second end of the fiber portion define a longitudinal direction and the at least one grating has an optical characteristic that varies with strain of the fiber portion. The supporting assembly has a first supporting member formed of a material having ultra low CTE, a second supporting member formed of a material having a negative CTE and a tuning means for changing the dimension of the first supporting member substantially along the longitudinal direction. The first supporting member and the second supporting member are bonded together. The first end and the second end of the fiber portion are fixed on the supporting assembly such that the optical characteristic of the grating is tunable by the tuning means and effect of temperature fluctuations on the fiber portion is substantially compensated by the second supporting member.