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Analysis of Transmission Spectrum Characteristics of Second-Order Fiber Flexible Comb Filter Based on Polarization-Diversity Loop

편광상이 고리 기반 2차 광섬유 유연 빗살 필터의 투과 스펙트럼 특성 분석

Park, Kyoungsoo;Lee, Yong Wook
박경수;이용욱

  • Received : 2015.07.12
  • Accepted : 2015.10.06
  • Published : 2015.12.31

Abstract

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.

Keywords

Fiber Comb Filter;High Birefringence Fiber;Polarization-Diversity Loop

References

  1. 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. https://doi.org/10.1364/OE.11.003359
  2. 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. https://doi.org/10.1109/LPT.2004.832601
  3. 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. https://doi.org/10.1109/68.634718
  4. 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. https://doi.org/10.1016/S0030-4018(02)01355-X
  5. 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. https://doi.org/10.1109/JQE.2004.828266
  6. 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. https://doi.org/10.1364/OPEX.13.001039
  7. 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. https://doi.org/10.1364/OE.16.003871
  8. 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. https://doi.org/10.1016/j.optcom.2013.03.017

Acknowledgement

Supported by : 한국연구재단