All-optical regeneration based on highly nonlinear photonic crystal fiber

Abstract

An all-optical regeneration based on self-phase modulation in a highly nonlinear photonic crystal fiber is proposed. The dispersion and nonlinearity properties of a series of photonic crystal fibers are analyzed, and the results show that the nonlinearity coefficient is closely related to the structure of the fiber. In this paper, the nonlinearity coefficient is increased by reducing the effective mode area, and a highly nonlinear photonic crystal fiber with a large air-filling fraction is used as nonlinearity medium in optical regeneration. The numerical results show that good optical regeneration results can be obtained by using a relatively short fiber length due to the high nonlinearity of the fiber. The input peak power launched into the photonic crystal fiber and the parameters of the filter have much influence on optical regeneration. To achieve good optical regeneration, those parameters need to meet certain requirements. Furthermore, the transfer characteristic of the regenerator is also discussed. By adjusting the input peak power and filter parameters, the regenerator can deal with input pulses of different pulse widths.

References

1. Russell P . Photoniccrystal fibers. Science, 2003, 299(5605): 358–362. doi:10.1126/science.1079280
2. Zhang C S, Kai G Y, Wang Z, et al.. Influence of lateral pressure on phase and groupmodal birefringence in microstructure fiber. Acta Optica Sinica, 2006, 26(2): 171–175 (in Chinese)
3. Zhang X, Wang Z N, Yang G Q, et al.. Birefringence in squeezed hexagonal latticemicrostructure fiber. Acta Optica Sinica, 2006, 26(1): 25–28 (in Chinese)
4. Wu J Q, Xue W R, Zhou G S . Dispersion property analysis of square-lattice varyingmicrostructured optical fiber. Acta OpticaSinica, 2005, 25(2): 174–178 (in Chinese)
5. Liu Y Y, Hou L T, Li Q J, et al.. Measurement of photon localization in micro-structureoptical fibers using coherent back scattering. Chinese Journal of Lasers, 2006, 33(3): 343–346 (in Chinese)
6. Zhou Q L, Lu X Q, Qiu J R, et al.. Beam-shaping microstructure optical fiber. Chinese Optics Letters, 2005, 3(12): 686–688
7. Lou S Q, Wang Z, Ren G B, et al.. Polarization properties of elliptical core photoniccrystal fiber. Journal of Optoelectronics· Laser, 2004, 15(9): 1021–1025 (in Chinese)
8. Birks T A, Knight J C, Russell P . Endlessly single mode photonic crystal fiber. Optics Letters, 1997, 22(13): 961–963. doi:10.1364/OL.22.000961
9. Knight J C, Arriaga J, Birks T A, et al.. Anomalous dispersion in photonic crystal fiber. IEEE Photonics Technology Letters, 2000, 12(7): 807–809. doi:10.1109/68.853507
10. Broderick N G R, Monro T M, Bennett P J, et al.. Nonlinearity in holey optical fibers: measurementand future opportunities. Optics Letters, 1999, 24(20): 1395–1397. doi:10.1364/OL.24.001395
11. Zhang X, Yang G Q, Huang Y Q, et al.. Researches on all-optical wavelength conversionin highly nonlinear microstructure fibers. Journal of Optoelectronics · Laser, 2005, 16(10): 1211–1213 (in Chinese)
12. Song X P, Chen B, Lin J F, et al.. Supercontinuum generation in multi-core microstructurefiber. Chinese Journal of Lasers, 2006, 33(8): 1066–1068 (in Chinese)
13. Abedin K S, Kubota F . Wavelength tunable high-repetition-ratepicosecond and femtosecond pulse sources based on highly nonlinearphotonic crystal fiber. IEEE Journal ofSelected Topics in Quantum Electronics, 2004, 10(5): 1203–1210. doi:10.1109/JSTQE.2004.837229
14. Abedin K S . Nonlinear optical loop mirror with highly birefringent polarization-maintainingphotonic crystal fiber for walk-off free wavelength conversion over150 nm. In: : Proceedings of Conferenceon Lasers and Electro-Optics (CLEO2004), 2004, 2: 16–21
15. Andersen P A, Tokle T, Geng Y, et al.. Wavelength conversion of a 40-Gb/s RZ-DPSK signalusing four-wave mixing in a dispersion-flattened highly nonlinearphotonic crystal fiber. IEEE PhotonicsTechnology Letters, 2005, 17(9): 1908–1910. doi:10.1109/LPT.2005.853275
16. Her T H, Raybon G, Headley C . Optimization of pulse regeneration at 40 Gb/s based onspectral filtering of self-phase modulation in fiber. IEEE Photonics Technology Letters, 2004, 16(1): 200–202. doi:10.1109/LPT.2003.819367
17. Li Y F, Hu M L, Wang Q Y . Supercontinuum generated from photonic crystal fiberand its applications. Journal of Optoelectronics· Laser, 2003, 14(11): 1240–1243 (in Chinese)
18. Qiu M . Analysisof guided modes in photonic crystal fibers using the finite-differencetime-domain method. Microwave Optics TechnolologyLetters, 2001, 30(5): 327–330
19. Agrawal G P . Nonlinear Fiber Optics & Applications of Nonlinear Fiber Optics(in Chinese, trans. Jia Dongfang, Yu Zhenhong, Tan Bin, et al.). Beijing: Publishing House of Electronics Industry, 2002, 42–59
20. Mamyshev P V . All-optical data regeneration based on self-phase modulation effect. In: Proceedings of the 24th European Conferenceon Optical Communication (ECOC'98), Madrid Spain. 1998, 1: 475–476