Optimizing signal collection efficiency of the VIPA-based Brillouin spectrometer  

作　　者：Zhaokai Meng Vladislav V.Yakovlev 

机构地区：[1]Texas A&M University,College Station,TX 77843,USA

出　　处：《Journal of Innovative Optical Health Sciences》2015年第4期39-45,共7页创新光学健康科学杂志（英文）

基　　金：supported by the start-up funds available through Texas A&M University;support of the NIH (Grant#R21EB011703) and the NSF (ECCS Grant#10665620,DBI Grant#10665621 and CBET Grant#10665623).

摘　　要：Brillouin spectroscopy is an emerging tool for microscopic optical imaging as it allows for non-invasive and direct assessment of the viscoelastic properties of materials.Recent advances of background-free confocal Brillouin spectrometer allows investigators to acquire the Brillouin spectra for turbid samples as well as transparent ones.However,due to strong signal loss induced by the imperfect optical setup,the Brillouin photons are usually immersed in background noise.In this report,we proposed and experimentally demonstrated multiple approaches to enhance the signal collction eficiency.A signal enhancement by>4 times can be observed,enabling ob-servation of ultra-weak signals.

关 键 词：Brillouin spectroscopy confocal microscope microscopic mechanical property specific imaging 

分 类 号：TN2[电子电信—物理电子学]