A Broadband Linearized Coherent Analog Fiber-Optic Link Employing Dual Parallel Mach-Zehnder Modulators

被引：53

作者：

Zhu, Guanghao ^{[1
]}

Liu, Wei ^{[1
]}

Fetterman, Harold R. ^{[1
]}

机构：

[1] Univ Calif Los Angeles, Dept Elect Engn, Los Angeles, CA 90095 USA

来源：

IEEE PHOTONICS TECHNOLOGY LETTERS | 2009年 / 21卷 / 21期

关键词：

Analog optical link; coherent detection; intermodulation distortion; linearized modulator; suppressed carrier; DISTORTION;

D O I：

10.1109/LPT.2009.2031166

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A composite optical transmitter based on dual parallel Mach-Zehnder modulators is proposed to linearize double-sideband suppressed-carrier coherent analog fiber-optic links. The optimization condition for achieving the best spurious-free dynamic range (SFDR) is discussed, with a simple and exact expression for the maximized SFDR being derived. Unlike other existing linearization schemes, the proposed technique has the advantages of broadband operation and shot-noise-limited signal-to-noise ratio at the same time. For a lossless link employing a transmitter laser with moderate optical power of 100 mW, a broadband SFDR as high as 144 dB . Hz(4/5) is theoretically predicted.

引用

页码：1627 / 1629

页数：3

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