Optical fiber photoacoustic-photothermal probe |
| |
Authors: | Beard P C Pérennès F Draguioti E Mills T N |
| |
Institution: | Department of Medical Physics and Bioengineering, University College London, Shropshire House, 11-20 Capper Street, London WC1E 6JA, UK. |
| |
Abstract: | We describe the operation of an all-optical probe that provides an alternative means of implementing photoacoustic and photothermal investigative techniques, particularly those used in biomedical applications. The probe is based on a transparent, acoustically and thermally sensitive Fabry-Perot polymer film sensor mounted at the end of an optical fiber. We demonstrate the ability of the system to make photoacoustic and photothermal measurements simultaneously and evaluate its photothermal response, using a nonscattering liquid target of known and adjustable absorption coefficient. The acoustic and thermal noise floors were 2 kPa and 6x10(-3) degrees C , respectively, obtained over a 25-MHz measurement bandwidth and 30 signal averages. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|