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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 17 — Aug. 13, 2012
  • pp: 18652–18658

BER-adaptive flexible-format transmitter for elastic optical networks

Hyeon Yeong Choi, Takehiro Tsuritani, and Itsuro Morita  »View Author Affiliations

Optics Express, Vol. 20, Issue 17, pp. 18652-18658 (2012)

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We propose a new optical transmitter which is capable of changing flexibly the modulation format of the optical signal. By using this transmitter, we can handle and assign various modulation formats: binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), 8-ary quadrature amplitude modulation (8QAM), and 16QAM. The proposed transmitter is based on a combination of a dual-drive Mach-Zehnder modulator (DD-MZM) and a dual-parallel MZM (DP-MZM) with electrical binary drive signals. DD-MZM is a key element to produce the 8QAM and 16QAM formats where each arm of DD-MZM is driven by independent binary data. This is because we can modulate the amplitude and phase of the optical signal by using a frequency chirp of the modulator when we adjust properly the amplitudes of the electrical drive signals. In addition, we show an algorithm by which the proposed transmitter can intelligently select the modulation format in accordance with the signal quality.

© 2012 OSA

OCIS Codes
(060.2330) Fiber optics and optical communications : Fiber optics communications
(060.2360) Fiber optics and optical communications : Fiber optics links and subsystems
(060.4080) Fiber optics and optical communications : Modulation

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: June 19, 2012
Revised Manuscript: July 22, 2012
Manuscript Accepted: July 26, 2012
Published: July 31, 2012

Hyeon Yeong Choi, Takehiro Tsuritani, and Itsuro Morita, "BER-adaptive flexible-format transmitter for elastic optical networks," Opt. Express 20, 18652-18658 (2012)

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