LMA Ytterbium doped tapered fiber YDF-DC-40/400-PM-TPR-2.5-A
Large mode area ytterbium doped double clad polarization-maintaining tapered fiber YDF-DC-40/400-PM-TPR-2.5-A series is designed for operation without any power degradation in extremely high-peak-power cladding-pumped amplifiers. The new tapered fiber design has a single-mode end (typical dimension is 8/80 µm) for signal input and a very-large-mode-area end (typical dimension is 40/400 µm) for signal output and pump input. The all-glass double-clad fiber design (based on highly F-doped second cladding with typical NA=0.26) allow simple polishing of the thick 400 µm fiber end. Due to a high Yb concentration and a short tapered fiber length amplifiers based on this fiber has the highest threshold of nonlinear effects over the market (up to 0.5 MW) together with the diffraction limited beam quality at the output.
LMA Ytterbium doped tapered fiber
Type of signal
|Signal input end||Signal output / pump input end|
|Core diameter, µm||9 ± 1||> 40|
|Clad diameter, µm||90 ± 10||400 ± 50|
|Cutoff wavelength, µm||< 1.0||-|
|MFD, µm||10.0 ± 2.0||> 24 (25-30 typical)|
|Core NA||0.09 ± 0.01|
|Clad NA||> 0.26|
|Clad shape||PANDA with F-doped second cladding|
|Clad absorption (915 nm), dB/m||> 4|
|Clad absorption (976 nm), dB/m||> 15|
|Core background loss (1150 nm), dB/km||< 50|
|Photodarkening resistance||> 20 times better compare to the Al2O3-SiO2 Yb-doped fiber|
Other parameters are available on the request
FORC PUBLICATIONS OF LMA YTTERBIUM DOPED TAPERED FIBERS
Publication: Vol. 29, No. 2 / 18 January 2021 / Optics Express. Author: Konstantin K. Bobkov, Andrey E. Levchenko, Tatiana A. Kochergina, etc.
Conference:2020 SPIE, vol. 11260 1126020-1. Author: Konstantin K. Bobkov, Andrey E. Levchenko, Tatiana A. Kochergina, etc.
Conference:CLEO 2019. Author: Konstantin K. Bobkov, Andrey E. Levchenko, Vladimir V. Velmiskin, etc.
Publication: Vol. 25, No. 22 | 30 Oct 2017 | OPTICS EXPRESS 26958. Author: Konstantin K. Bobkov, Alexey Andrianov, Maxim Koptev, Sergey Muravyev, etc.