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CL, PL and laser slope efficiencies in 1 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 (dB/cm) | Laser slope efficiency (%η) |
|---|---|---|---|---|
| WG5 | 50 | 0.92 | 0.74 ± 0.05 | 7 |
| WG6 | 100 | 0.68 | 0.63 ± 0.06 | 10 |
| WG7 | 150 | 0.95 | 0.88 ± 0.05 | No lasing |
| WG8 | 200 | 1.24 | 1.22 ± 0.07 | No lasing |
| WG9 | 100 | 0.85 | 0.34 ± 0.03 | 19 |
| WG10 | 200 | 0.63 | 0.22 ± 0.03 | 28 |
