Spectrally balanced detection for optical frequency domain imaging

被引：42

作者：

Chen, Yueli ^{[1
,2
]}

de Bruin, Daniel M. ^{[1
,2
]}

Kerbage, Charles ^{[1
,2
]}

de Boer, Johannes F. ^{[1
,2
]}

机构：

[1] Harvard Univ, Sch Med, Boston, MA 02114 USA

[2] Massachusetts Gen Hosp, Wellman Ctr Photomed, Boston, MA 02114 USA

来源：

OPTICS EXPRESS | 2007年 / 15卷 / 25期

关键词：

D O I：

10.1364/OE.15.016390

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In optical frequency domain imaging (OFDI) or swept-source optical coherence tomography, balanced detection is required to suppress relative intensity noise (RIN). A regular implementation of balanced detection by combining reference and sample arm signal in a 50/50 coupler and detecting the differential output with a balanced receiver is however, not perfect. Since the splitting ratio of the 50/50 coupler is wavelength dependent, RIN is not optimally canceled at the edges of the wavelength sweep. The splitting ratio has a nearly linear shift of 0.4% per nanometer. This brings as much as +/- 12% deviation at the margins of wavelength-swept range centered at 1060nm. We demonstrate a RIN suppression of 33dB by spectrally corrected balanced detection, 11dB more that regular balanced detection. (c) 2007 Optical Society of America.

引用

页码：16390 / 16399

页数：10

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