3x3 Mach-Zehnder interferometer with unbalanced differential detection for full-range swept-source optical coherence tomography

被引：35

作者：

Mao, Youxin ^{[1
]}

Sherif, Sherif ^{[1
]}

Flueraru, Costel ^{[1
]}

Chang, Shoude ^{[1
]}

机构：

[1] Natl Res Council Canada, Inst Microstruct Sci, Ottawa, ON K1A 0R6, Canada

来源：

APPLIED OPTICS | 2008年 / 47卷 / 12期

关键词：

D O I：

10.1364/AO.47.002004

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Quadrature interferometry based on 3 x 3 fiber couplers could be used to double the effective imaging depth in swept-source optical coherence tomography. This is due to its ability to suppress the complex conjugate artifact naturally. We present theoretical and experimental results for a 3 x 3 Mach-Zehnder interferometer using a new unbalanced differential optical detection method. The new interferometer provides simultaneous access to complementary phase components of the complex interferometric signal. No calculations by trigonometric relationships are needed. We demonstrate a complex conjugate artifact suppression of 27 dB obtained in swept-source optical coherence tomography using our unbalanced differential detection. We show that our unbalanced differential detection has increased the signal-to-noise ratio by at least 4 dB compared to the commonly used balanced detection technique. This is due to better utilization of optical power. (C) 2008 Optical Society of America.

引用

页码：2004 / 2010

页数：7

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