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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 12 — Jun. 4, 2012
  • pp: 13164–13172

Phase sensitive amplification with noise figure below the 3 dB quantum limit using CW pumped PPLN waveguide

Masaki Asobe, Takeshi Umeki, and Osamu Tadanaga  »View Author Affiliations


Optics Express, Vol. 20, Issue 12, pp. 13164-13172 (2012)
http://dx.doi.org/10.1364/OE.20.013164


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Abstract

The noise figure (NF) of a phase sensitive amplifier (PSA) based on a periodically poled LiNbO3 (PPLN) waveguide was evaluated in the optical and electrical domains. Phase sensitive amplification was realized using degenerate parametric amplification in the PPLN waveguide, which was pumped by the second harmonic frequency of the signal. Second harmonic pumping enables direct observation of the intrinsic amplified spontaneous emission (ASE), which determined the NF of the PSA. An NF below the 3 dB quantum limit was obtained by observing the intrinsic ASE. The low NF was also confirmed via the noise floor measurement of a cascaded PSA and erbium doped fiber amplifier in the electrical domain. The PSA was used as a preamplifier for detecting a 40 Gbit/s phase shift keying signal. The low noise characteristics were confirmed by the improved sensitivity.

© 2012 OSA

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

ToC Category:
Integrated Optics

History
Original Manuscript: April 3, 2012
Revised Manuscript: May 21, 2012
Manuscript Accepted: May 22, 2012
Published: May 25, 2012

Citation
Masaki Asobe, Takeshi Umeki, and Osamu Tadanaga, "Phase sensitive amplification with noise figure below the 3 dB quantum limit using CW pumped PPLN waveguide," Opt. Express 20, 13164-13172 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-12-13164


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