COMPARISON OF FIBEROPTIC SAGNAC AND MACH-ZEHNDER INTERFEROMETERS WITH RESPECT TO THERMAL-PROCESSES IN THE FIBER

被引：28

作者：

KRAKENES, K ^{[1
]}

BLOTEKJAR, K ^{[1
]}

机构：

[1] SIMRAD OPTRON AS,N-0602 OSLO,NORWAY

来源：

JOURNAL OF LIGHTWAVE TECHNOLOGY | 1995年 / 13卷 / 04期

关键词：

D O I：

10.1109/50.372481

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：

The impact of thermal noise in the fiber on the noise power and signal-to-noise ratio (SNR) of fiber-optic sensors is investigated, and sensors based on the Sagnac and the Mach-Zehnder interferometers are compared, The SNR is almost the same for the two interferometers; the Mach-Zehnder interferometer has slightly higher SNR at low frequencies, whereas the Sagnac interferometer may have a few dB higher SNR at high frequencies. It is also shown that thermal noise may dominate over shot noise for realistic system parameters, in which case a Sagnac interferometer has several advantages over a Mach-Zehnder interferometer.

引用

页码：682 / 686

页数：5

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