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Journal of Biomedical Optics

Calibrating the measurement of wavelength-dependent second harmonic generation from biological tissues with a BaB2O4 crystal
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Paper Abstract

Although second harmonic generation (SHG) imaging has emerged as a powerful tool for imaging biological tissues with submicron resolution, the excitation wavelength dependence of SHG intensity in biological tissues is an optical property that is not fully understood so far. We first calibrate system factors which may potentially affect the accuracy of the wavelength-dependent SHG measurement. Then our calibration is validated by measuring the wavelength dependence of SHG signal from a BaB 2 O 4 crystal under different focusing conditions and comparing with the theoretical calculations. The good agreement between the experimental results and theoretical calculations demonstrates that we have established a reliable method to validate wavelength-dependent SHG measurement over a broad wavelength range. We also investigate the wavelength dependence of a 10-μm thick mouse tendon tissue in both forward and backward directions. It is found that SHG of mouse tendon tissue decreases monotonically for excitation from 750 to 950 nm.

Paper Details

Date Published: 8 February 2013
PDF: 9 pages
J. Biomed. Opt. 18(3) 031109 doi: 10.1117/1.JBO.18.3.031109
Published in: Journal of Biomedical Optics Volume 18, Issue 3
Show Author Affiliations
Mengzhe Shen, The Univ. of British Columbia (Canada)
Jianhua Zhao, The BC Cancer Agency Research Ctr. (Canada)
Haishan Zeng, The BC Cancer Agency Research Ctr. (Canada)
Shuo Tang, The Univ. of British Columbia (Canada)

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