Open AccessMethod to improve absorption measurement sensitivity of thin films with surface thermal lens technique
Author(s) -
Shuhai Fan,
Hongbo He,
Jianda Shao,
Zhengxiu Fan,
Zhao Yuan-An
Publication year - 2006
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.55.758
Subject(s) - sensitivity (control systems) , optics , materials science , lens (geology) , position (finance) , thermal , absorption (acoustics) , diffraction , laser , surface (topology) , physics , electronic engineering , geometry , mathematics , finance , engineering , economics , meteorology
In order to improve the sensitivity of surface thermal lens(STL) absorption measurement, numerical simulations are performed based on STL diffraction theory. The optimization method for choosing proper instrument parameters, including the size and position of probe laser waist and the position of detecting fiber, is developed from the simulation. The sensitivity of the instrument reaches 0.1ppm after the optimization.