Table 1.
PL and CL through 100 kHz, 200 nJ written WGs at 1550 nm wavelength. FL for the Yb3+:GPGN glass is (0.73 ± 0.05) dB. PL is the WG PL calculated from TL using PL = TL/d where d = 1.05 cm is the length of the WGs.
| WG | WG diameter (μm) | CL ± 0.05 (dB) | PL (dB/cm) | Laser operation | |
|---|---|---|---|---|---|
| WG1 | Single line | 4 µm × 4 µm | 1.33 | 0.80 ± 0.07 | No |
| WG2 | Double lines (5 μm apart) | 6 µm × 4 µm | 1.01 | 0.91 ± 0.04 | |
| WG3 | Triple lines (5 μm apart) | 8 µm × 6 µm | 0.85 | 1.08 ± 0.06 | |
| WG4 | 2 × 2 array of four single lines (5 μm apart) | 10 µm × 9 µm | 0.79 | 1.28 ± 0.07 | |