Central wavelength tunable mechanism for temperature compensated package of fiber BRAGG gratings

The central wavelength of fiber Bragg grating (FBG) must be located in the specified channel band of wavelength division multiplexer (WDM) in optical communication network. Furthermore, the central wavelength also must be sta ble in the ambient temperature. A temperature compensated fixture is theref ore essential for the application of FBG, By the strength of materials, a t heoretical model of the fully temperature compensated fixture can be derive d for zero shift of central wavelength of FBG in ambient temperature. Besid es, a microtunable mechanism for the pre-pulling force on the FBG is synthe sized to adjust the central wavelength to a certain channel band. By the tu nable mechanism one can calibrate effectively and efficiently the FBG in ma ss production of FBG based products.