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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 9 — May. 6, 2013
  • pp: 10712–10719

Self-stabilizing optical clock pulse-train generator using SOA and saturable absorber for asynchronous optical packet processing

Tatsushi Nakahara and Ryo Takahashi  »View Author Affiliations

Optics Express, Vol. 21, Issue 9, pp. 10712-10719 (2013)

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We propose a novel, self-stabilizing optical clock pulse-train generator for processing preamble-free, asynchronous optical packets with variable lengths. The generator is based on an optical loop that includes a semiconductor optical amplifier (SOA) and a high-extinction spin-polarized saturable absorber (SA), with the loop being self-stabilized by balancing out the gain and absorption provided by the SOA and SA, respectively. The optical pulse train is generated by tapping out a small portion of a circulating seed pulse. The convergence of the generated pulse energy is enabled by the loop round-trip gain function that has a negative slope due to gain saturation in the SOA. The amplified spontaneous emission (ASE) of the SOA is effectively suppressed by the SA, and a backward optical pulse launched into the SOA enables overcoming the carrier-recovery speed mismatch between the SOA and SA. Without external control for the loop gain, a stable optical pulse train consisting of more than 50 pulses with low jitter is generated from a single 10-ps seed optical pulse even with a variation of 10 dB in the seed pulse intensity.

© 2013 OSA

OCIS Codes
(230.1150) Optical devices : All-optical devices
(250.5980) Optoelectronics : Semiconductor optical amplifiers
(130.6622) Integrated optics : Subsystem integration and techniques
(060.6719) Fiber optics and optical communications : Switching, packet

ToC Category:

Original Manuscript: February 6, 2013
Revised Manuscript: April 19, 2013
Manuscript Accepted: April 19, 2013
Published: April 25, 2013

Tatsushi Nakahara and Ryo Takahashi, "Self-stabilizing optical clock pulse-train generator using SOA and saturable absorber for asynchronous optical packet processing," Opt. Express 21, 10712-10719 (2013)

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  1. R. Takahashi, T. Nakahara, K. Takahata, H. Takenouchi, T. Yasui, N. Kondo, and H. Suzuki, “Ultrafast optoelectronic packet processing for asynchronous, optical-packet-switched networks,” OSA J. Opt. Netw.3(12), 914–930 (2004). [CrossRef]
  2. S. J. B. Yoo, “Optical packet and burst switching technologies for the future photonic internet,” J. Lightwave Technol.24(12), 4468–4492 (2006). [CrossRef]
  3. H. Takenouchi, R. Urata, T. Nakahara, T. Segawa, H. Ishikawa, and R. Takahashi, “First demonstration of a prototype hybrid optoelectronic router,” in Proceedings of ECOC2009 (Vienna, Austria, 2009), paper PD3.2.
  4. D. Chiaroni, R. Urata, J. Gripp, J. E. Simsarian, G. Austin, S. Etienne, T. Segawa, Y. Pointurier, C. Simonneau, Y. Suzaki, T. Nakahara, M. Thottan, A. Adamiecki, D. Neilson, J. C. Antona, S. Bigo, R. Takahashi, and V. Radoaca, “Demonstration of the Interconnection of Two Optical Packet Rings with a Hybrid Optoelectronic Packet Router,” in Proceedings of ECOC2010 (Torino, Italy, 2010), paper PD3.5. [CrossRef]
  5. R. Urata, R. Takahashi, T. Suemitsu, T. Nakahara, and H. Suzuki, “An optically clocked transistor array for high-speed asynchronous label swapping: 40 Gb/s and beyond,” J. Lightwave Technol.26(6), 692–703 (2008). [CrossRef]
  6. R. Takahashi, T. Yasui, J. K. Seo, and H. Suzuki, “Ultrafast all-optical serial-to-parallel converters based on spin-polarized surface-normal optical switches,” IEEE J. Sel. Top. Quantum Electron.13(1), 92–103 (2007). [CrossRef]
  7. T. Nakahara, R. Takahashi, T. Yasui, and H. Suzuki, “Optical clock-pulse-train generator for processing preamble-free asynchronous optical packets,” IEEE Photon. Technol. Lett.18(17), 1849–1851 (2006). [CrossRef]
  8. T. Nakahara, H. Takenouchi, R. Urata, H. Yamazaki, and R. Takahashi, “Hybrid optoelectronic buffer using CMOS memory and optical interfaces for 10-Gbit/s asynchronous variable-length optical packets,” Opt. Express18(20), 20565–20571 (2010). [CrossRef] [PubMed]
  9. T. Nakahara, Y. Suzaki, R. Urata, T. Segawa, H. Ishikawa, and R. Takahashi, “Enhanced multi-hop operation using hybrid optoelectronic router with time-to-live-based selective forward error correction,” Opt. Express19(26), B301–B307 (2011). [CrossRef] [PubMed]

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