Title :
Narrow-bandwidth all-fiber acoustooptic tunable filter with low polarization-sensitivity
Author :
Yeom, Dong Il ; Kim, Hyo Sang ; Kang, Myeong Soo ; Park, Hee Su ; Kim, Byoung Yoon
Author_Institution :
Dept. of Phys., Korea Adv. Inst. of Sci. & Technol., Daejeon, South Korea
Abstract :
We demonstrate a narrow-bandwidth acoustooptic tunable filter with very low polarization-sensitivity using a dispersion-compensating fiber that has a large group index difference between the core and the cladding modes with a specific stress distribution. The 3-dB bandwidth of the filter is 0.8 nm with the interaction length of 10 cm, and the polarization-dependent center-wavelength splitting is 0.04 nm at the wavelength around 1550 nm. The origin of the low polarization-dependence is successfully explained through the analysis on the stress field in the fiber.
Keywords :
acousto-optical devices; optical fibre cladding; optical fibre dispersion; optical fibre filters; optical fibre polarisation; 1550 nm; all-fiber acoustooptic filter; center-wavelength splitting; cladding mode; core mode; dispersion-compensating fiber; fiber stress field; interaction length; large group index difference; low polarization-sensitivity; narrow-bandwidth filter; polarization-dependent splitting; stress distribution; tunable filter; Acoustic measurements; Bandwidth; Optical fiber dispersion; Optical fiber filters; Optical fiber polarization; Optical filters; Optical refraction; Thermal stresses; WDM networks; Wavelength division multiplexing; Acoustooptic devices; gratings; optical fiber filters; tunable filters;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2005.859152
