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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 14, Iss. 26 — Dec. 25, 2006
  • pp: 12655–12664

Optical-spectrum-synthesizer design within an all-optical semiconductor gate to reduce waveform distortion induced by carrier-cooling relaxation at sub-Teraherz frequencies

Yoshiyasu Ueno, Ryouichi Nakamoto, Jun Sakaguchi, and Rei Suzuki  »View Author Affiliations

Optics Express, Vol. 14, Issue 26, pp. 12655-12664 (2006)

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In frequency ranges above 200–300 GHz, the second slowest relaxation in the optical response (such as carrier- cooling relaxation having a time constant of 1–2 ps) of a semiconductor optical amplifier inside the conventional delayed-interference signal-wavelength converter (DISC) scheme is thought to start the distortion of all-optically gated waveforms. In this work, we design a digital optical-spectrum-synthesizer block that is part of the expanded DISC scheme. Our numerically calculated spectra, waveforms, and eye diagrams with assumed pseudorandom digital data pulses indicate that this synthesizer significantly removes strong distortion from the gated waveforms. A signal-to-noise ratio of 20 dB was obtained from our random-data eye diagram, providing proof of effectiveness in principle.

© 2006 Optical Society of America

OCIS Codes
(060.2330) Fiber optics and optical communications : Fiber optics communications
(120.5060) Instrumentation, measurement, and metrology : Phase modulation
(190.5970) Nonlinear optics : Semiconductor nonlinear optics including MQW
(190.7110) Nonlinear optics : Ultrafast nonlinear optics
(250.5980) Optoelectronics : Semiconductor optical amplifiers
(320.7080) Ultrafast optics : Ultrafast devices

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: October 16, 2006
Revised Manuscript: December 4, 2006
Manuscript Accepted: December 7, 2006
Published: December 22, 2006

Yoshiyasu Ueno, Ryouichi Nakamoto, Jun Sakaguchi, and Rei Suzuki, "Optical-spectrum-synthesizer design within an all-optical semiconductor gate to reduce waveform distortion induced by carrier-cooling relaxation at sub-Teraherz frequencies," Opt. Express 14, 12655-12664 (2006)

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