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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 2 — Jan. 22, 2007
  • pp: 583–588

Proposal and simulation of all-optical NRZ-to-RZ format conversion using cascaded sum- and difference-frequency generation

Jian Wang, Junqiang Sun, Qizhen Sun, Dalin Wang, and Dexiu Huang  »View Author Affiliations

Optics Express, Vol. 15, Issue 2, pp. 583-588 (2007)

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All-optical 40 Gbit/s format conversion from nonreturn-to-zero (NRZ) to return-to-zero (RZ) is proposed and simulated for the first time, using the cascaded sum- and difference-frequency generation (SFG+DFG) in a periodically poled lithium niobate (PPLN) waveguide incorporated in a Sagnac interferometer structure. Simultaneous single-to-triple channel NRZ-to-RZ format conversion is achieved. Both optical spectra and eye diagrams exhibit impressive conversion performance. The duty cycle, pulse width ratio, Q-factor and extinction ratio (ER) of the converted RZ are analyzed. It is found that flexible NRZ-to-RZ format conversion can be implemented with great tunability, i.e. both input NRZ signal wavelength and converted RZ wavelength can be tuned in a wide wavelength range (>60 nm).

© 2007 Optical Society of America

OCIS Codes
(070.4560) Fourier optics and signal processing : Data processing by optical means
(130.3730) Integrated optics : Lithium niobate
(190.0190) Nonlinear optics : Nonlinear optics
(230.1150) Optical devices : All-optical devices

ToC Category:
Nonlinear Optics

Original Manuscript: October 4, 2006
Revised Manuscript: November 16, 2006
Manuscript Accepted: November 29, 2006
Published: January 22, 2007

Jian Wang, Junqiang Sun, Qizhen Sun, Dalin Wang, and Dexiu Huang, "Proposal and simulation of all-optical NRZ-to-RZ format conversion using cascaded sum- and difference-frequency generation," Opt. Express 15, 583-588 (2007)

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  1. J. Sun, W. Liu, J. Tian, J. R. Kurz, and M. M. Fejer, "Multichannel wavelength conversion exploiting cascaded second-order nonlinearity in LiNbO3 waveguides," IEEE Photon. Technol. Lett. 15, 1743 - 1745 (2003). [CrossRef]
  2. J. Wang, J. Sun, J. R. Kurz, and M. M. Fejer, "Tunable wavelength conversion of ps-pulses exploiting cascaded sum- and difference frequency generation in a PPLN-fiber ring laser," IEEE Photon. Technol. Lett. 18, 2093 - 2095 (2006). [CrossRef]
  3. J. Wang, J. Sun, C. Luo, and Q. Sun, "Experimental demonstration of wavelength conversion between ps-pulses based on cascaded sum- and difference frequency generation (SFG+DFG) in LiNbO3 waveguides," Opt. Express 13, 7405-7414 (2005). [CrossRef] [PubMed]
  4. J. Wang, J. Sun, X. Zhang, X. Yuan, and D. Huang, "Experimental observation of tunable wavelength down- and up-conversions of ultra-short pulses in a periodically poled LiNbO3 waveguide," Opt. Commun. 269, 179 - 187 (2007). [CrossRef]
  5. S. Yu, and W. Gu, "A tunable wavelength conversion and wavelength add/drop scheme based on cascaded second-order nonlinearity with double-pass configuration," IEEE J. Quantum Electron. 41, 1007 - 1012 (2005). [CrossRef]
  6. G. Imeshev, M. A. Arbore, S. Kasriel, and M. M. Fejer, "Pulse shaping and compression by second-harmonic generation with quasi-phase-matching gratings in the presence of arbitrary dispersion," J. Opt. Soc. Am. B 17, 1420 - 1437 (2000). [CrossRef]
  7. G. S. Kanter, P. Kumar, K. R. Parameswaran, and M. M. Fejer, "Wavelength-selective pulsed all-optical switching based on cascaded second-order nonlinearity in a periodically poled lithium-niobate waveguide," IEEE Photonics Technol. Lett. 13, 341 - 343 (2001). [CrossRef]
  8. J. Wang, J. Sun, and Q. Sun, "Experimental observation of a 1.5 μm band wavelength conversion and logic NOT gate at 40 Gbit/s based on sum-frequency generation," Opt. Lett. 31, 1711 - 1713 (2006). [CrossRef] [PubMed]
  9. S. Bigo, E. Desurvire, S. Gauchard, and E. Brun, "Bit-rate enhancement through optical NRZ-to-RZ conversion and passive time-division multiplexing for soliton transmission systems," Electron. Lett. 30, 984 - 985 (1994). [CrossRef]
  10. L. Xu, B. C. Wang, V. Baby, I. Glesk, and P. R. Prucnal, "All-optical data format conversion between RZ and NRZ based on a Mach-Zehnder interferometric wavelength converter," IEEE Photon. Technol. Lett. 15, 308 - 310 (2003). [CrossRef]
  11. M. Jinno, and T. Matsumoto, "Nonlinear Sagnac interferometer switch and its applications," IEEE J. Quantum Electron. 28, 875 - 882 (1992). [CrossRef]

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