Table 4.
Output beam far-field full angle divergence (ϕ) in ° and Rayleigh range (zR) in μm for different optrode geometries (tip taper angle of 45° or 30° and shank width of 95 μm or 150 μm) at two wavelengths (IR and visible). In-coupling fibers of various core diameters (df) were used.
| df (μm) | Optrode ϕ(zR)
|
|||||
|---|---|---|---|---|---|---|
|
λ = 1550 nm
|
λ = 640 nm
|
|||||
| 45° | 45° | 30° | 45° | 45° | 30° | |
| 95μm | 150μm | 150μm | 95μm | 150μm | 150μm | |
| 50 | 13.7 (245) | 16.1 (438) | 56.6 (119) | 16.5 (220) | 17.5 (413) | 61.3 (111) |
| 105 | 15.8 (255) | 15.5 (462) | 55.9 (128) | 18.9 (194) | 18.7 (388) | 57.0 (113) |
| 200 | 16.2 (257) | 20.0 (390) | 69.1 (102) | 19.2 (188) | 21.0 (372) | 76.5 (95) |
| 400 | 19.9 (233) | 20.7 (404) | 83.0 (85) | 22.7 (224) | 22.9 (361) | 102.7 (68) |