Publisher : The Korean Institute of IIIuminating and Electrical Installation Engineers
DOI : 10.5207/JIEIE.2015.29.12.001
Title & Authors
Analysis of Transmission Spectrum Characteristics of Second-Order Fiber Flexible Comb Filter Based on Polarization-Diversity Loop Park, Kyoungsoo; Lee, Yong Wook;
In this paper, we propose a second-order fiber flexible comb filter based on a polarization-diversity loop(PDL). The proposed filter consists of a polarization beam splitter, four half-wave plates(HWPs), and three high birefringence fiber(HBF) segments. In the previous Solc-type second-order filter based on the PDL, HBF segments were fusion-spliced with a fixed angle offset between their principal axes with each other. But, the proposed filter implemented by inserting two HWPs between three HBF segments has a great flexibility in adjusting relative angular difference between the principal axes of two adjacent HBF segments. Owing to this flexibility, second-order transmission spectra, which had a channel spacing of ~0.8nm, could be interleaved by controlling the orientation angles of four HWPs. The output transmission spectra of the proposed filter were theoretically analyzed and experimentally verified.
Y. W. Lee, K. J. Han, B. Lee, and J. Jung, "Polarization-independent all-fiber multiwavelength-switchable filter based on a polarization-diversity loop configuration," Optics Express, vol. 11, pp. 3359-3364, 2003.
Y. W. Lee, K. J. Han, J. Jung, and B. Lee, "Polarization-independent tunable fiber comb filter," IEEE Photonics Technology Letters, vol. 16, pp. 2066-2068, 2004.
X. Fang, K. Demarest, H. Ji, C. Allen, and L. Pelz, "A subnanosecond polarization-independent tunable filter/wavelength router using a Sagnac interferometer," IEEE Photonics Technology Letters, vol. 9, pp. 1490-1492, 1997.
Z. Jia, M. Chen, K. Xu, Y. Dong, and S. Xie, "Performance analysis of optical label eraser," Optics Communications, vol. 205, pp. 265-269, 2002.
G. Zhu, Q. Wang, H. Chen, H. Dong, and N. K. Dutta, "High-quality optical pulse train generation at 80 Gb/s using a modified regenerative-type mode-locked fiber laser," IEEE Journal of Quantum Electronics, vol. 40, pp. 721-725, 2004.
Y. W. Lee, J. Jung, and B. Lee, "Wavelength-switchable flat-top fiber comb filter based on Solc type birefringence combination," Optics Express, vol. 13, pp. 1039-1048, 2005.
Y. W. Lee, H-T. Kim, and Y. W. Lee, "Second-order all-fiber comb filter based on polarization-diversity loop configuration," Optics Express, vol. 16, pp. 3871-3876, 2008.
Y. Kim and Y. W. Lee, "Study on spectral deviation of high-order optical fiber comb filter based on polarization-diversity loop configuration," Optics Communications, vol. 301-302, pp. 159-163, 2013.