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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 22 — Oct. 22, 2012
  • pp: 24727–24734

3-dB signal-ASE beat noise reduction of coherent multi-carrier signal utilizing phase sensitive amplification

Takeshi Umeki, Hidehiko Takara, Yutaka Miyamoto, and Masaki Asobe  »View Author Affiliations

Optics Express, Vol. 20, Issue 22, pp. 24727-24734 (2012)

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We demonstrated the simultaneous amplification of a coherent multi-carrier signal using a χ(2)-based non-degenerate phase sensitive amplifier (PSA). The signal-to-noise ratio (SNR), which is degraded by the additional amplified spontaneous emission (ASE) noise, can be recovered due to the gain difference between a phase-correlated signal-idler pair and uncorrelated excess noise. Utilizing the second harmonic pumping of a χ(2)-based PSA enables us to observe the SNR recovery directly by comparing the SNR for the input with that for the PSA output. A 3-dB optical-SNR (OSNR) improvement was obtained as a result of the gain difference. We also achieved a 3-dB SNR improvement in the electric domain by reducing the signal-ASE beat noise. The receiver sensitivity for a 10 Gbit/s phase shift keying signal was clearly improved with the PSA.

© 2012 OSA

OCIS Codes
(130.3730) Integrated optics : Lithium niobate
(190.4410) Nonlinear optics : Nonlinear optics, parametric processes

ToC Category:
Integrated Optics

Original Manuscript: July 26, 2012
Revised Manuscript: September 30, 2012
Manuscript Accepted: October 1, 2012
Published: October 15, 2012

Takeshi Umeki, Hidehiko Takara, Yutaka Miyamoto, and Masaki Asobe, "3-dB signal-ASE beat noise reduction of coherent multi-carrier signal utilizing phase sensitive amplification," Opt. Express 20, 24727-24734 (2012)

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