First demonstration of high-order QAM signal amplification in PPLN-based phase sensitive amplifier

被引：50

作者：

Umeki, T. ^{[1
,2
]}

Tadanaga, O. ^{[1
]}

Asobe, M. ^{[1
]}

Miyamoto, Y. ^{[2
]}

Takenouchi, H. ^{[1
,2
]}

机构：

[1] NTT Corp, NTT Photon Labs, Atsugi, Kanagawa 2430198, Japan

[2] NTT Corp, NTT Network Innovat Labs, Hikarinooka Yokosuka, Kanagawa 2390847, Japan

来源：

OPTICS EXPRESS | 2014年 / 22卷 / 03期

关键词：

OPTICAL PHASE; NOISE-FIGURE; REGENERATION; GENERATION; LINKS;

D O I：

10.1364/OE.22.002473

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We demonstrate the phase sensitive amplification of a high-order quadrature amplitude modulation (QAM) signal using non-degenerate parametric amplification in a periodically poled lithium niobate (PPLN) waveguide. The interaction between the pump, signal, and phase-conjugated idler enables us to amplify arbitrary phase components of the signal. The 16QAM signals are amplified without distortion because of the high gain linearity of the PPLN-based phase sensitive amplifier (PSA). Both the phase and amplitude noise reduction capabilities of the PSA are ensured. Phase noise cancellation is achieved by using the interaction with the phase-conjugated idler. A degraded signal-to-noise ratio (SNR) is restored by using the gain difference between a phase-correlated signalidler pair and uncorrelated excess noise. The applicability of the simultaneous amplification of multi-carrier signals and the amplification of two independent polarization signals are also confirmed with a view to realizing ultra-high spectrally efficient signal amplification. (C)2014 Optical Society of America

引用

页码：2473 / 2482

页数：10

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