Table 1. Input parameters for PT-OCT analytical model.
| Optical properties | 5mm ICG phantom | Human hair phantom |
|---|---|---|
| Scattering coefficient μs (cm−1) | 50 [33] | (Silicone) 50 |
| (Hair) 55 [34] | ||
| Absorption coefficient μa (cm−1) | 11 [35] | (Silicone) 0.005 [36] |
| (Hair) 50 [34] | ||
| PT laser power P0 (mW) | 0-16 | 15 |
| PT laser wavelength (nm) | 750 | 750 |
| Back-scattering coefficient μb (cm−1) | 1a,b | 1a,b |
| Thermal conductivity k (W/K) | 0.18 [36] | 0.25 [37] |
| Specific heat c (J/kg*K) | 1200 [36] | 1602 [37] |
| Density of medium ρ (kg/m3) | 1020 [36] | 1100 [37] |
| Laser beam radius ω0 (μm) | 36 [28] | 36 |
| Rayleigh length z0 (μm) | 1000 | 1000 |
| Depth of focus zf (μm) | 400 | 400 |
| Dwell time of PT laser tL (ms) | 1 | 1 |
| Index of refraction n | 1.44 [36] | (Silicone) 1.44 |
| (Hair) 1.55 [34] | ||
| Thermo-optic coefficient dn/dT (K−1) | −340 x 10−6 [38] | −110 x 10−6 [23]a |
| Thermal expansion coefficient β (K−1) | 275 x 10−6 [36] | 100 x 10−6 [23]a |
| OCT wavelength λ0 (nm) | 860 | 860 |
| OCT power S (mW) | 2 | 2 |
| OCT coherence length (μm) | 15.1 | 15.1 |
| Detector responsivity δ (A/W) | 0.2 | 0.2 |
| A-scan acquisition time Δt (μs) | 100 | 100 |
a
Approximate value since exact values were not found in the literature.
b
If necessary, the backscattering coefficient can be more precisely determined with published methods [39].