Optical signal to noise ratio improvement through unbalanced noise beating in phase-sensitive parametric amplifiers.

We investigate the beating of signal and idler waves, which have imbalanced signal to noise ratios, in a phase-sensitive parametric amplifier. Imbalanced signal to noise ratios are achieved in two ways; first by imbalanced noise loading; second by varying idler to signal input power ratio. In the case of imbalanced noise loading the phase-sensitive amplifier improved the signal to noise ratio from 3 to 6 dB, and in the case of varying idler to signal input power ratio, the signal to noise ratio improved from 3 to in excess of 20 dB.

[1]  C.E. Shannon,et al.  Communication in the Presence of Noise , 1949, Proceedings of the IRE.

[2]  C. Caves.  Quantum limits on noise in linear amplifiers , 1982 .

[3]  B. D. Gupta,et al.  Fabrication and characterization of a surface plasmon resonance based fiber-optic sensor for bittering component—Naringin , 2006 .

[4]  P. Andrekson,et al.  Ultralow Noise, Broadband Phase-Sensitive Optical Amplifiers, and Their Applications , 2012, IEEE Journal of Selected Topics in Quantum Electronics.

[5]  B Corcoran,et al.  Noise beating in hybrid phase-sensitive amplifier systems. , 2014, Optics express.

[6]  K. Goda,et al.  Optically amplified detection for biomedical sensing and imaging. , 2013, Journal of the Optical Society of America. A, Optics, image science, and vision.

[7]  V. Wallace,et al.  Biomedical applications of terahertz technology , 2006 .

[8]  L. Gruner-Nielsen,et al.  Fiber Optic Parametric Amplifier With 10-dB Net Gain Without Pump Dithering , 2013, IEEE Photonics Technology Letters.

[9]  S Radic,et al.  Quantum noise properties of parametric amplifiers driven by two pump waves. , 2004, Optics express.

[10]  J Webjörn,et al.  Noiseless optical amplification in quasi-phase-matched bulk lithium niobate. , 1996, Optics letters.

[11]  Guifang Li,et al.  Phase Regeneration of NRZ-DPSK Signals Based on Symmetric-Pump Phase-Sensitive Amplification , 2007, IEEE Photonics Technology Letters.

[12]  P. Andrekson,et al.  Towards ultrasensitive optical links enabled by low-noise phase-sensitive amplifiers , 2011 .

[13]  P. Andrekson,et al.  Modeling and measurement of the noise figure of a cascaded non-degenerate phase-sensitive parametric amplifier. , 2010, Optics express.

[14]  B. Corcoran,et al.  Phase-sensitive optical pre-amplifier implemented in an 80km DQPSK link , 2012, OFC/NFOEC.

[15]  M Vasilyev,et al.  Noise performance of a frequency nondegenerate phase-sensitive amplifier with unequalized inputs. , 2011, Optics letters.

[16]  V. Wallace,et al.  Biomedical applications of terahertz technology , 2002, The 15th Annual Meeting of the IEEE Lasers and Electro-Optics Society.

[17]  Analysis of prebreakdown current in a gas discharge system with a semiconducting cathode , 2006 .

[18]  Wada Naoya,et al.  Phase-squeezing properties of non-degenerate PSAs using PPLN waveguides , 2011 .

[19]  Takeshi Umeki,et al.  First demonstration of multi-span transmission using phase and amplitude regeneration in PPLN-based PSA , 2013, 2013 Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference (OFC/NFOEC).

[20]  Michael Vasilyev,et al.  Noiseless Optical Amplification of Images , 1999 .

[21]  Zhi Tong,et al.  Low-noise optical amplification and signal processing in parametric devices , 2013 .

[22]  Zhi Tong,et al.  Broadband parametric multicasting via four-mode phase-sensitive interaction. , 2012, Optics express.

[23]  M. Vasilyev.  Distributed phase-sensitive amplification. , 2005, Optics express.