Abstract

The Raman gain enhancement of a regenerative ultrafast all-optical cross-phase modulation (XPM) wavelength converter (WC) is quantitatively investigated and experimentally demonstrated to operate error free at 40 and 80 Gb/s. The regenerative nature of the converter is shown by experimentally demonstrating a negative 2-dB power penalty at 80 Gb/s. It is also shown that the Raman gain greatly enhances the wavelength conversion efficiency at 80 Gb/s by 21 dB at a Raman pump power of 600 mW using 1 km of highly nonlinear fiber. An analytical theory based on nonlinear phase-shift enhancement of the fiber-effective length is presented and shows the relationship between a nonlinear enhancement and Raman gain as a function of pump power and fiber design parameters. Measured parameters are used in the analytical model, and a good fit between experiment and theory is shown for two different types of fiber: one dispersion-shifted and one highly nonlinear fiber. The ultrafast response time of Raman gain makes this technique applicable to fiber-based ultrafast WCs. In addition, the applicability to other nonlinear fiber wavelength conversion techniques is discussed.

© 2005 IEEE

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Opt. Lett. (2)

Other (21)

A. Jourdan, F. Masetti, M. Garnot, G. Soulage and M. Sotom, "Design and implementation of a fully reconfigurable all-optical crossconnect for high capacity multi-wavelength transport networks", J. Lightw. Technol., vol. 14, no. 6, pp. 1198-1206, Jun. 1996.

P. E. Green, L. A. Coldren, C. M. Johnson, J. G. Lewis, C. M. Miller, J. F. Morrison, R. Olshansky, R. Ramaswami and E. H. Smith, "All-optical packet-switched metropolitan-area network proposal", J. Lightw. Technol., vol. 11, pp. 754-763, May 1993.

M. L. Masanovic, V. Lal, J. S. Barton, E. J. Skogen, L. A. Coldren and D. J. Blumenthal, "Monolithically integrated Mach-Zender interferometer wavelength converter and widely tunable laser in InP", IEEE Photon. Technol. Lett., vol. 15, no. 8, pp. 1117-1119, Aug. 2003.

J. Leuthold, C. H. Joyner, B. Mikkelsen, G. Raybon, J. L. Pleumeekers, B. I. Miller, K. Dreyer and C. A. Burrus, "100 Gbit/s all-optical wavelength conversion with integrated SOA delayed-interference configuration", Electron. Lett., vol. 36, pp. 1129-1130, 2000.

J. M. Tang and K. A. Shore, "A simple scheme for polarization insensitive four-wave mixing in semiconductor optical amplifiers", IEEE Photon. Technol. Lett., vol. 11, no. 9, pp. 1123-1125, Sep. 1999.

J. Yamawaku, H. Takara, T. Ohara, K. Sato, A. Takada, T. Morioka, O. Tadanaga, H. Miyazawa and M. Asobe, "Simultaneous 25 GHz-spaced DWDM wavelength conversion of 1. 03 Tbit/s (103 * 10 Gbit/s) signals in PPLN waveguide", Electron. Lett., vol. 39, no. 24, pp. 1144-1145, 2003.

G. P. Agrawl, Nonlinear Fiber Optics, 2nd ed. San Diego, CA: Academic, 1995.

O. Aso and S. Namiki, "Recent advances of ultra-broadband fiberoptics wavelength converters", presented at the Eur. Conf. Optical Communication (ECOC) , Munich, Germany,Sep. 3-7, 2000, Paper ThA3.

J. Yu, X. Zheng, C. Peucheret, A. Clausen, H. Poulsen and P. Jeppesen, "All-optical wavelength conversion of short pulses and NRZ signals based on a nonlinear optical loop mirror", J. Lightw. Technol., vol. 18, no. 7, pp. 1007-1017, Jul. 2000.

P. V. Mamyshev, "All-optical data regeneration based on self-phase modulation effect", in Proc. Eur. Conf. Optical Communication (ECOC), 1998, pp. 475-476.

B. E. Olsson, P. Ohlen, L. Rau and D. J. Blumenthal, "A simple and robust 40-Gb/s wavelength converter using fiber cross-phase modulation and optical filtering", IEEE Photon. Technol. Lett., vol. 12, no. 7, pp. 846-848, Jul. 2000.

D. A. Chestnut, C. R. S. Matos and J. R. Taylor, "Raman-assisted fiber optical parametric amplifier and wavelength converter in highly nonlinear fiber", J. Opt. Soc. Amer. B, Opt. Phys., vol. 19, no. 1901, 2002.

H. Masuda, S. Kawai and K.-I. Suzuki, "Optical SNR enhanced amplification in long-distance recirculating-loop WDM transmission experiment using 1580 nm band hybrid amplifier", Electron. Lett., vol. 35, pp. 411-412, 1999.

M. Nissov, C. R. Davidson, K. Rottwitt, R. Menges, P. C. Corbett, D. Innis and N. S. Bergano, "100 Gb/s (10 * 10 Gb/s) WDM transmission over 7200 km using distributed Raman amplification", in Proc. Eur. Conf. Optical Communication (ECOC), vol. 5, 1997, pp. 9-12.

C. R. S. Fludger, V. Handerek and R. J. Mears, "Ultra-wide bandwidth Raman amplifiers", in Optical Fiber Communication (OFC) Conf. Tech. Dig., 2002, pp. 60-62.

T. Naito, T. Tanaka, K. Torii, N. Shimojoh, H. Nakamoto and M. Suyama, "A broadband distributed raman amplifier for bandwidths beyond 100 nm", in Optical Fiber Communication (OFC) Conf. Tech. Dig., 2002, pp. 116-117.

C. Vinegoni, M. Wegmuller and N. Gisin, "Measurement of the nonlinear coefficient of standard SMF, DSF and DCF fiber using a self-aligned interferometer and a Faraday mirror", IEEE Photon. Technol. Lett., vol. 13, no. 12, pp. 1337-1339, Dec. 2001.

L. Prigent and J. Hamaide, "Measurement of fiber nonlinear Kerr coefficient by four-wave mixing", IEEE Photon. Technol. Lett., vol. 5, no. 9, pp. 1092-1095, Sep. 1993.

C. R. S. Fludger, V. Handerek and R. J. Mears, "Pump to signal RIN transfer in Raman fiber amplifiers", J. Lightw. Technol., vol. 19, no. 8, pp. 1140-1148, Aug. 2001.

P. Ohlen, B. E. Olsson and D. J. Blumenthal, "Wavelength dependence and power requirements of a wavelength converter based on XPM in a dispersion-shifted optical fiber", IEEE Photon. Technol. Lett., vol. 12, no. 5, pp. 522 -524, May 2000.

A. Boskovic, S. V. Chernikov and J. R. Taylor, "Direct continuous-wave measurement of n2 in various types of telecommunication fiber at 1. 55 micron", Opt. Lett. , vol. 21, no. 24, pp. 1966-1968, 1996.

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