Multi-channel spectral-domain optical coherence tomography using single spectrometer  

作　　者：王玉坤 陈思 林侃 陈曦 徐正阳 娄世良 葛欣 倪光明 余孝军 莫建华 穆全全 刘琳波 Yukun Wang;Si Chen;Kan Lin;Xi Chen;Zhengyang Xu;Shiliang Lou;Xin Ge;Guangming Ni;Xiaojun Yu;Jianhua Mo;Quanquan Mu;Linbo Liu(School of Electrical and Electronic Engineering,Nanyang Technological University,Singapore 639798,Singapore;State Key Laboratory of Applied Optics,Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China;Key Laboratory of Opto-Electronics Information Technology of Ministry of Education,School of Precision Instruments and Opto-Electronic Engineering,Tianjin University,Tianjin 300072,China;School of Science,Shenzhen Campus of Sun Yat-sen University,Shenzhen 518107,China;School of Optoelectronic Science and Engineering,University of Electronic Science and Technology of China,Chengdu 610054,China;School of Automation,Northwestern Polytechnical University,Xi’an 710129,China;School of Electronics and Information Engineering,Soochow University,Suzhou 215006,China)

机构地区：[1]School of Electrical and Electronic Engineering,Nanyang Technological University,Singapore 639798,Singapore [2]State Key Laboratory of Applied Optics,Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China [3]Key Laboratory of Opto-Electronics Information Technology of Ministry of Education,School of Precision Instruments and Opto-Electronic Engineering,Tianjin University,Tianjin 300072,China [4]School of Science,Shenzhen Campus of Sun Yat-sen University,Shenzhen 518107,China [5]School of Optoelectronic Science and Engineering,University of Electronic Science and Technology of China,Chengdu 610054,China [6]School of Automation,Northwestern Polytechnical University,Xi’an 710129,China [7]School of Electronics and Information Engineering,Soochow University,Suzhou 215006,China

出　　处：《Chinese Optics Letters》2023年第5期25-30,共6页中国光学快报（英文版）

基　　金：supported by the Singapore Ministry of Health’s National Medical Research Council under its Open Fund Individual Research Grant(No.MOH-000384);the Singapore Ministry of Education under its Academic Research Funding Tier 2(No.MOE-T2EP30120-0001);the Academic Research Funding Tier 1(No.RG35/22);the China Scholarship Council,and the National Natural Science Foundation of China(NSFC)(No.12004381)。

摘　　要：Multi-channel detection is an effective way to improve data throughput of spectral-domain optical coherence tomography(SDOCT).However,current multi-channel OCT requires multiple detectors,which increases the complexity and cost of the system.We propose a novel multi-channel detection design based on a single spectrometer.Each camera pixel receives interferometric spectral signals from all the channels but with a spectral shift between two channels.This design effectively broadens the spectral bandwidth of each pixel,which reduces relative intensity noise(RIN)by√M times with M being the number of channels.We theoretically analyzed the noise of the proposed design under two cases:shot-noise limited and electrical noise or RIN limited.We show both theoretically and experimentally that this design can effectively improve the sensitivity,especially for electrical noise or RIN-dominated systems.

关 键 词：optical coherence tomography multiple channels fiber-optic sensor imaging system 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]