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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 26 — Dec. 10, 2012
  • pp: B322–B330

Modulation format conversion employing coherent optical superposition

Francesca Parmigiani, Liam Jones, Joseph Kakande, Periklis Petropoulos, and David J. Richardson  »View Author Affiliations

Optics Express, Vol. 20, Issue 26, pp. B322-B330 (2012)

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We propose and experimentally study the passive coherent optical addition of complex modulation format signals through the use of a delay line interferometer followed by a temporal gate to increase the encoded bits per symbol and consequently, the spectral efficiency of an incident signal. Modulation format conversion and packet compression are demonstrated as two possible application examples. A variety of modulation formats can be accommodated, whereas higher compression factors can be achieved through the use of a cascade of delay line interferometers.

© 2012 OSA

OCIS Codes
(060.4230) Fiber optics and optical communications : Multiplexing
(230.1360) Optical devices : Beam splitters
(230.2090) Optical devices : Electro-optical devices

ToC Category:
Waveguide and Optoelectronic Devices

Original Manuscript: October 4, 2012
Revised Manuscript: November 6, 2012
Manuscript Accepted: November 6, 2012
Published: November 29, 2012

Virtual Issues
European Conference on Optical Communication 2012 (2012) Optics Express

Francesca Parmigiani, Liam Jones, Joseph Kakande, Periklis Petropoulos, and David J. Richardson, "Modulation format conversion employing coherent optical superposition," Opt. Express 20, B322-B330 (2012)

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  1. X. Liu, S. Chandrasekhar, P. J. Winzer, B. Zhu, D. W. Peckham, S. Draving, J. Evangelista, N. Hoffman, C. J. Youn, Y. H. Kwon, and E. S. Nam, “3 × 485-Gb/s WDM transmission over 4800 km of ULAF and 12 × 100-GHz WSSs using CO-OFDM and single coherent detection with 80-GS/s ADCs,” OFC-NFOEC, paper PDPC2 (2010).
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  5. K. Mishina, S. Kitagawa, and A. Maruta, “All-optical modulation format conversion from on-off-keying to multiple-level phase-shift-keying based on nonlinearity in optical fiber,” Opt. Express15(13), 8444–8453 (2007). [CrossRef] [PubMed]
  6. G. W. Lu, E. Tipsuwannakul, T. Miyazaki, C. Lundström, M. Karlsson, and P. Andrekson, “Format conversion of optical multilevel signals using FWM-based optical phase erasure,” J. Lightwave Technol.29(16), 2460–2466 (2011). [CrossRef]
  7. C. Su, Y. Yikai, L. Yi, L. Leng, X. Tian, X. X. Xinyu, and Y. Tian, “All-optical format conversion from NRZ to BPSK using a single saturated SOA,” IEEE Photon. Technol. Lett.18(22), 2368–2370 (2006).
  8. J. Kakande, A. Bogris, R. Slavík, F. Parmigiani, D. Syvridis, P. Petropoulos, and D. J .Richardson, “First demonstration of all-optical QPSK signal regeneration in a novel multi-format phase sensitive amplifier,” ECOC 2010, Torino, Italy, PD 3.3 (2010).
  9. H. Kishikawa, P. Seddighian, N. Goto, S. Yanagiya, and L. R. Chen, “All-optical modulation format conversion from binary to quadrature phase-shift keying using delay line interferometer, ” Photonics Conference (PHO), 513 - 514 (2011).
  10. M. Sköld, H. Sunnerud, M. Westlund, and P. A. Andrekson, “Simultaneous waveform and bit-error-rate measurements of 66 GBd PDM-16-QAM signals,” ECOC PD Th.13.B.3 (2011).
  11. F. Parmigiani, J. Kakande, L. M. Jones, P. Petropoulos, and D. J. Richardson, “Packet compression of complex modulation formats based on coherent optical superposition,” International Conference on Transparent Optical Networks (ICTON 2012) Warwick UK (2012).
  12. F. Parmigiani, J. Kakande, L. M. Jones, P. Petropoulos, and D. J. Richardson, “Temporal multiplexing of complex modulation formats facilitated by their coherent optical superposition,” European Conference and Exhibition on Optical Communication (ECEOC) Amsterdam, The Netherlands, June 16, 2012 (2010).
  13. K. Kikuchi, “Coherent detection of phase-shift keying signals using digital carrier-phase estimation,” OFC (2006).

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