Short cavity-length random fiber laser with record power and ultrahigh efficiency

Xueyuan Du; Hanwei Zhang; Xiaolin Wang; Pu Zhou; Zejin Liu

doi:10.1364/OL.41.000571

Optics Letters
Vol. 41,
Issue 3,
pp. 571-574
(2016)
•https://doi.org/10.1364/OL.41.000571

Short cavity-length random fiber laser with record power and ultrahigh efficiency

Xueyuan Du, Hanwei Zhang, Xiaolin Wang, Pu Zhou, and Zejin Liu

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Xueyuan Du, Hanwei Zhang, Xiaolin Wang, Pu Zhou, and Zejin Liu, "Short cavity-length random fiber laser with record power and ultrahigh efficiency," Opt. Lett. 41, 571-574 (2016)

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Abstract

We report the result of achieving a random fiber laser (RFL) with record 200-W-level power output. The highest output power is realized by a simple 120 m long cavity at a working wavelength of 1173 nm while pumping at 1120 nm. The maximum observed optical-to-optical efficiency reaches $\sim 89 %$ , which is believed to be the highest value ever reported for RFLs. In addition, numerical calculations on different order Raman Stokes wave thresholds based on the theoretical model are carried out for comparison with the experimental data. The presented work effectively advances the power scalability, and the numerical model well describes the lasing thresholds in such short cavity RFLs.

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Parameter	Value	Unit
$g_{R 1}, g_{R 2}$	0.7, 0.63	${km}^{- 1} W^{- 1}$
$α_{0}, α_{1}, α_{2}$	0.33, 0.28, $0.22 \times 10^{- 4}$	$m^{- 1}$
$T$	298	K
$ϵ 0, ϵ 1, ϵ 2$	$0.55 \times 10^{- 6}$	$m^{- 1}$
$Δ ν 1, Δ ν 2$	0.22	THz

Parameter	Value	Modified Value
$R_{L 1}$	0.99	—
$R_{R 1}$	$4 \times 10^{- 5}$	—
$R_{L 2}$	$4 \times 10^{- 5}$	$5 \times 10^{- 3}$
$R_{R 2}$	$4 \times 10^{- 5}$	—

Parameter	Value	Unit
$g_{R 1}, g_{R 2}$	0.7, 0.63	${km}^{- 1} W^{- 1}$
$α_{0}, α_{1}, α_{2}$	0.33, 0.28, $0.22 \times 10^{- 4}$	$m^{- 1}$
$T$	298	K
$ϵ 0, ϵ 1, ϵ 2$	$0.55 \times 10^{- 6}$	$m^{- 1}$
$Δ ν 1, Δ ν 2$	0.22	THz

Parameter	Value	Modified Value
$R_{L 1}$	0.99	—
$R_{R 1}$	$4 \times 10^{- 5}$	—
$R_{L 2}$	$4 \times 10^{- 5}$	$5 \times 10^{- 3}$
$R_{R 2}$	$4 \times 10^{- 5}$	—

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Optics Letters