Fabrication and characterization of sandwiched optical fibers with periodic gratings.
This study proposes a novel process for fabricating a sandwiched long-period fiber grating (SLPFG) using a SU-8 thick photoresist technique. The SLPFG consists of a thin cladding optical fiber sandwiched with a double-sided periodical grating coating. By varying the external loads on the SLPFG, the transmission dip of the resonance wavelength is tuned according to a squared-harmonic curve. The SLPFG can thus be utilized as a loss tunable filter or sensor. The resonance dip wavelength is related to the cladding thicknesses of the optical fiber and the periods of the grating. A maximum transmission resonant dip of 34.61dB was achieved.
Chiang
Chia-Chin
CC
Department of Mechanical Engineering, National Kaohsiung University of Applied Sciences,415 Chien Kung Road, Kaohsiung 807, Taiwan. ccchiang@cc.kuas.edu.tw