Noise analysis in photonic true time delay systems based on broadband optical source and dispersion components

被引：7

作者：

Xue, Xiaoxiao ^{[1
]}

Wen, He ^{[1
]}

Zheng, Xiaoping ^{[1
]}

Zhang, Hanyi ^{[1
]}

Guo, Yili ^{[1
]}

Zhou, Bingkun ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Elect Engn, Natl Lab Informat Sci & Technol, State Key Lab Integrated Optoelect, Beijing 100084, Peoples R China

来源：

APPLIED OPTICS | 2009年 / 48卷 / 04期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1364/AO.48.000658

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The noise in photonic true time delay systems based on broadband optical source and dispersion components is investigated. It is found that the beat noise induced by the optical source begins to dominate and grows far larger than other noise terms quickly, as long as the detected optical power is above some certain value P-thr. When the system dispersion is nonzero, the output carrier-to-noise ratio (CNR) will change periodically with the optical bandwidth due to the noise power increment and the dispersion induced radio frequency signal power degradation. The maximum CNR is the peak value of the first period. For a set of specified system conditions, the P-thr is calculated to be -21 dBm, and the optimal optical bandwidth is 0.8 nm, at which the maximum CNR is 93.3 dB by considering the noise in a 1 Hz bandwidth. The results are verified experimentally. (C) 2009 Optical Society of America

引用

页码：658 / 663

页数：6

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