Abstract:

 The transmission characteristics of photons in the skin tissue at alcohol wavelength were studied by using Monte-Carlo simulation method in this study. A fourlayer skin structure model was established in which the optical parameter was determined at alcohol wavelength (1694nm, 1735nm, 2266nm, 2308nm). The Monte-Carlo simulations results showed that the optimal detection distance was 650μm at 1694nm and 1735nm, 450μm at 2266nm and 2308nm. The photons densities showed a decline trend with the increase of detection distance r in the range from 200μm to 1000μm. The number of detected photons increases linearly with the detection width. Based on the above results, an optical fiber probe for alcohol non-invasive testing was designed, and the TE-cooled InGaAs detector was optimized.
 

Key words: Monte Carlo; alcohol; near-infrared; photon transmission; fiber optic probe