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Optical Amplifiers and Their Applications

Theoretical noise figure of phase-sensitive amplifier using Mach-Zender interferometer with lossy Kerr media

Wataru Imajuku, Atsushi Takada

Published Jan 1, 1999• 0 citations
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Abstract

Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text W. Imajuku and A. Takada, "Theoretical noise figure of phase-sensitive amplifier using Mach-Zender interferometer with lossy Kerr media," in Optical Amplifiers and their Applications, S. Kinoshita, J. Livas, and G. van den Hoven, eds., Vol. 30 of Trends in Optics and Photonics (Optical Society of America, 1999), paper ThD2. Export Citation BibTex Endnote (RIS) HTML Plain Text Citation alert Save article

DOI
10.1364/oaa.1999.thd2

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Noise figure of phase-sensitive parametric amplifier using a mach-zehnder interferometer with lossy kerr media and noisy pump

Wataru Imajuku, Atsushi Takada

The noise figure (NF) of a phase-sensitive parametric amplifier using a nonlinear Mach-Zehnder interferometer (NMZI) with Kerr media is analyzed for amplitude-modulation signals. In the analysis, the distributed loss of the Kerr media and the excess noise of the pump light are taken into account. As for the distributed loss of the Kerr media, the quantum Langevin equation for the NMZI is derived and solved. The results elucidate a simple degradation factor in the NF representation of the amplifier. This factor implies that the NF can be less than the standard quantum limit (SQL) of 3 dB, even if the total loss of the Kerr media exceeds 3 dB. As for the excess noise of the pump light, the semi-classical small signal analysis is utilized. The results clearly indicate that the signal-to-noise ratio of the pump light must be four times higher than that of the input signal in order to realize a low-noise optical amplifier under the SQL of 3 dB.

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Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text W. Imajuku and A. Takada, "Theoretical noise figure of phase-sensitive amplifier using Mach-Zender interferometer with lossy Kerr media," in Optical Amplifiers and their Applications, S. Kinoshita, J. Livas, and G. van den Hoven, eds., Vol. 30 of Trends in Optics and Photonics (Optical Society of America, 1999), paper ThD2. Export Citation BibTex Endnote (RIS) HTML Plain Text Citation alert Save article
Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text D. Bayart, Y. Robert, P. Bousselet, J. Boniort, and L. Gasca, "Impact of spectral hole-burning for EDFAs operated in the long-wavelength band," in Optical Amplifiers and their Applications, S. Kinoshita, J. Livas, and G. van den Hoven, eds., Vol. 30 of Trends in Optics and Photonics (Optica Publishing Group, 1999), paper WD5. Export Citation BibTex Endnote (RIS) HTML Plain Text Citation alert Save article
The noise figure (NF) of a phase-sensitive parametric amplifier using a nonlinear Mach-Zehnder interferometer (NMZI) with Kerr media is analyzed for amplitude-modulation signals. In the analysis, the distributed loss of the Kerr media and the excess noise of the pump light are taken into account. As for the distributed loss of the Kerr media, the quantum Langevin equation for the NMZI is derived and solved. The results elucidate a simple degradation factor in the NF representation of the amplifier. This factor implies that the NF can be less than the standard quantum limit (SQL) of 3 dB, even if the total loss of the Kerr media exceeds 3 dB. As for the excess noise of the pump light, the semi-classical small signal analysis is utilized. The results clearly indicate that the signal-to-noise ratio of the pump light must be four times higher than that of the input signal in order to realize a low-noise optical amplifier under the SQL of 3 dB.