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Journal of Lightwave Technology

Journal of Lightwave Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 25, Iss. 3 — Mar. 1, 2007
  • pp: 710–718

Performance Evaluation of Tunable Channel-Selective Wavelength Shift by Cascaded Sum- and Difference-Frequency Generation in Periodically Poled Lithium Niobate Waveguides

Shiming Gao, Changxi Yang, Xiaosheng Xiao, Yu Tian, Zheng You, and Guofan Jin

Journal of Lightwave Technology, Vol. 25, Issue 3, pp. 710-718 (2007)


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Abstract

We theoretically evaluate the performance of tunable channel-selective wavelength shift based on cascaded sum- and difference-frequency generation by the use of two pump lights in periodically poled lithium niobate waveguides. In double-pass configurations, the functions of wavelength add/drop and wavelength shift are easy to integrate in the same waveguide. Analysis shows that a longer waveguide more competently adapts narrower channel spacing in wavelength-division-multiplexed (WDM) systems. This wavelength shifter is flexible due to the almost separable operations of the two pumps: The channel is selected by setting the first pump, and the wavelength-shifting value is tuned by adjusting the second pump. This wavelength shifter has a very large dynamic region. For a 2.56-cm-long waveguide, the maximum dynamic region is as broad as 67 nm in a 0.4-nm channel-spacing WDM system. The dynamic region is mainly dominated by the limitation of multiple-channel crosstalk in a dense WDM system. However, it is dominated by the limitation of single-channel efficiency fluctuation in a coarse one.

© 2007 IEEE

Citation
Shiming Gao, Changxi Yang, Xiaosheng Xiao, Yu Tian, Zheng You, and Guofan Jin, "Performance Evaluation of Tunable Channel-Selective Wavelength Shift by Cascaded Sum- and Difference-Frequency Generation in Periodically Poled Lithium Niobate Waveguides," J. Lightwave Technol. 25, 710-718 (2007)
http://www.opticsinfobase.org/jlt/abstract.cfm?URI=jlt-25-3-710

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