Title :
A compact all-fiber PDL-compensated acoustooptic wavelength monitor
Author :
Alhassen, Fares ; Dashti, Pedram Z. ; Lee, Henry P. ; Li, Qun ; Kim, Chang-Seok
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Univ. of California, Irvine, CA, USA
Abstract :
A compact all-fiber acoustooptic wavelength monitor with passive polarization-dependent loss (PDL) compensation is demonstrated. A Sagnac loop interferometer is used to compensate the intrinsic PDL, and hence, the polarization-dependent wavelength shift of the fiber acoustooptic tunable filter (AOTF). This increases the extrinsic wavelength accuracy of the device to 0.05 nm, a three-fold improvement from a previously reported uncompensated device. The relaxation in the PDL specifications for the AOTF also results in a reduction of fiber length from 38 to 14 cm.
Keywords :
Sagnac interferometers; acousto-optical filters; compensation; fibre optic sensors; notch filters; optical fibre filters; optical fibre losses; optical fibre polarisation; optical tuning; AOTF; Sagnac loop interferometer; acoustooptic wavelength monitor; fiber acoustooptic tunable filter; passive polarization-dependent loss compensation; polarization-dependent wavelength shift; Frequency shift keying; Monitoring; Optical fiber devices; Optical fiber filters; Optical fiber polarization; Optical fibers; Page description languages; Radio frequency; Sagnac interferometers; Wavelength measurement; Fiber acoustooptic filters; Sagnac interferometers; polarization-dependent loss (PDL); wavelength measurement;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2005.856349
