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Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 27,
  • Issue 13,
  • pp. 2246-2256
  • (2009)

Optical Packet Switching Networks With Binary Multiwavelength Labels

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Abstract

We propose a network structure for routing optical packets based on binary multiwavelength labels. We resolve the main drawbacks of previously proposed optical label switching scenarios: high splitting loss and complex, expensive hardware. In our scheme, the label is mapped bit-by-bit to a selection of wavelength bins. Variable-length packets are self-forwarded via a multistage switch. This structure is scalable, high-speed, simple, practical, and low-cost, exploiting the workhorses of today's optical communications systems: arrayed waveguide gratings, distributed feedback lasers, ${\rm LiNbO}_{3}$ switches, and low-speed photodiodes and electronics ($\sim {\hbox {100}}\,{\hbox {MHz}}$). We also propose a solution to alleviate the sophisticated label swapping processing required in generalized multiprotocol label switching (GMPLS) networks. We time-multiplex the binary multiwavelength labels for the entire optical label switching path. We examine the performance of both schemes experimentally by verifying successful routing and error-free transmission.

© 2009 IEEE

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