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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)
http://dx.doi.org/10.1364/OE.15.000583


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Abstract

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

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

Citation
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)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-15-2-583


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References

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