Elimination of depth degeneracy in optical frequency-domain imaging through polarization-based optical demodulation

被引:85
作者
Vakoc, BJ
Yun, SH
Tearney, GJ
Bouma, BE
机构
[1] Harvard Univ, Sch Med, Boston, MA 02114 USA
[2] Massachusetts Gen Hosp, Wellman Ctr Photomed, Boston, MA 02114 USA
关键词
D O I
10.1364/OL.31.000362
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
A novel optical frequency-domain imaging system is demonstrated that employs a passive optical demodulation circuit and a chirped digital acquisition clock derived from a voltage-controlled oscillator. The demodulation circuit allows the separation of signals from positive and negative depths to better than 50 dB, thereby eliminating depth degeneracy and doubling the imaging depth range. Our system design is compatible with dual-balanced and polarization-diverse detection, important techniques in the practical biomedical application of optical frequency-domain imaging. (c) 2006 Optical Society of America.
引用
收藏
页码:362 / 364
页数:3
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