Double clad FBGs are referred to writing gratings on the passive double clad fiber. For fiber laser application, the doped double clad fiber is used as active medium, and double clad FBGs on matching passive fiber are used as cavity mirrors, which play an irreplaceable role for fiber laser.
| Parameters | Units | Specifications | Tolerance |
| Center Wavelength Rang | nm | 1030~1080 | ±0.3 |
| Reflectivity | - | 0.5%~99.9% | ±5% |
| FWHM | nm | 0.1~1.5 | ±0.05 |
| SMSR | - | >8dB | |
| Recoating | - | Low Refractive Index Material or Custom | |
| Proof Test | - | >100Kpsi | |
| Fiber Type | - | Custom | |
| Operating Temperature | ℃ | 0~75 | |
| Storage Temperature | ℃ | -20~85 | |
| Termination | - | Bare fiber，FC/PC，FC/APC, etc | |
Fiber laser、Pump lockers、Fiber sensor
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