Thulium-doped fluorotellurite glass fibers for broadband S-band amplifiers.
Opt Lett
; 47(8): 1964-1967, 2022 Apr 15.
Article
en En
| MEDLINE
| ID: mdl-35427312
ABSTRACT
We demonstrated broadband S-band (1460-1530â
nm) amplification in Tm3+-doped fluorotellurite glass fibers (TDFTFs) by using a 1400/1570â
nm dual-wavelength pump technique. TDFTFs based on TeO2-BaF2-Y2O3 (TBY) glass were fabricated by using a rod-in-tube method. For an input signal power of 0 dBm (or 1â
mW), a broadband positive net gain ranging from <1440â
nm to 1546â
nm was achieved in a 1.55-m-long TDFTF with a Tm3+ doping concentration of â¼4000â
ppm, as the pump powers of the 1400â
nm and 1570â
nm lasers were 1.7 W and 0.14 W, respectively. The corresponding bandwidth for a net gain of >20â
dB was â¼66â
nm (1458-1524â
nm), and the measured saturated output power was â¼24.84 dBm at 1490â
nm. In addition, numerical simulation was performed by using the parameters of the TDFTFs and the pump lasers, and the noise figure was calculated to be <5.6â
dB in the S band. Our results showed that the TDFTFs were promising gain media for constructing efficient broadband S-band fiber amplifiers.
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MEDLINE
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Revista:
Opt Lett
Año:
2022
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Article