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Measured CL, PL and laser slope efficiency in the fundamental mode of the 5 MHz written WGs in Yb3+: GPGN glass at 1550 nm. 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 | Pulse energy (nJ) | CL ± 0.05 (dB) | PL ± 0.05 (dB/cm) | Laser slope efficiency (% η) |
|---|---|---|---|---|
| WG11 | 60 | 1.12 | 0.72 | 9 |
| WG12 | 80 | 0.98 | 0.61 | 12 |
| WG13 | 100 | 1.29 | 0.58 | 13 |
| WG14 | 120 | 1.08 | 0.97 | 4 |
