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Switching Dynamic Analysis for Twin-Core Fibre Coupler Using Supermode Theory |
| LUO Ai-Ping;XU Wen-Cheng;CHEN Wei-Cheng;CUI Hu |
| Laboratory of Photonic Information Technology and Institute of Quantum Electronics, South China Normal University, Guangzhou 510631 |
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| Cite this article: |
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LUO Ai-Ping, XU Wen-Cheng, CHEN Wei-Cheng et al 2006 Chin. Phys. Lett. 23 381-384 |
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Abstract Characteristics of optical switching in a twin-core fibre coupler are numerically analysed under short pulse input by using supermode theory. The dynamic nonlinear coupled supermode equations are derived. The numerical results show that the input pulse width determines the power transfer and the pulse temporal profile in the output ports. The optimal switching characteristics can be obtained by selecting an appropriate initial pulse width. In addition, the switching characteristic curves are insensitive to the input pulse shape for either fundamental soliton pulse or Gaussian pulse input, but sensitive to pulse sharpness. A reduced switching power and a sharper switching transition can be obtained by using the sharp super-Gaussian pulse.
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| Keywords:
42.65.Pc
42.81.Qb
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Published: 01 February 2006
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| PACS: |
42.65.Pc
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(Optical bistability, multistability, and switching, including local field effects)
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42.81.Qb
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(Fiber waveguides, couplers, and arrays)
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