1.3 kW monolithic linearly polarized single-mode master oscillator power amplifier and strategies for mitigating mode instabilities

Rumao Tao; Pengfei Ma; Xiaolin Wang; Pu Zhou; Zejin Liu

doi:10.1364/PRJ.3.000086

Journals >Photonics Research >Volume 3 >Issue 3 >Page 86 > Article

Photonics Research
Vol. 3, Issue 3, 86 (2015)

1.3 kW monolithic linearly polarized single-mode master oscillator power amplifier and strategies for mitigating mode instabilities

Rumao Tao¹, Pengfei Ma¹, Xiaolin Wang^1、*, Pu Zhou^1、2, and Zejin Liu¹

Author Affiliations

¹College of Optoelectric Science and Engineering, National University of Defense Technology, Changsha, Hunan 410073, China

²e-mail: zhoupu203@163.com

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DOI: 10.1364/PRJ.3.000086 Cite this Article Set citation alerts

Rumao Tao, Pengfei Ma, Xiaolin Wang, Pu Zhou, Zejin Liu. 1.3 kW monolithic linearly polarized single-mode master oscillator power amplifier and strategies for mitigating mode instabilities[J]. Photonics Research, 2015, 3(3): 86 Copy Citation Text

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Fig. 1. Architecture of the all-fiber PM amplifier.

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Fig. 2. Output characteristics of the main amplifier. (a) Output power. (b) Output spectrums. (c) PER.

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Fig. 3. Fluctuation characteristics of the output beam. (a) Time traces. (b) Frequency distribution.

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Fig. 4. Threshold calculation of the fiber amplifier.

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Fig. 5. Threshold pump power for different fiber cladding diameters.

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Fig. 6. Effect of coiling on MI threshold power.

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Fig. 7. Fluctuation characteristics of the output beam after tight coiling. (a) Time trace (b) Frequency distribution.

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$R_{core}$	10.5 μm
$R$	200 μm
$n_{0}$	1.45146
$N A$	0.064
$λ_{p}$	915 nm
$λ_{s}$	1064 nm
$h_{q}$	$5000 W / (m^{2} K)$
$η$	$1.2 \times 10^{- 5} K^{- 1}$
$κ$	$1.38 W / (Km)$
$ρ C$	$1.54 \times 10^{6} J / ({Km}^{3})$
$σ_{p}^{a}$	$6.04 \times 10^{- 25} m^{2}$
$σ_{p}^{e}$	$1.96 \times 10^{- 26} m^{2}$
$σ_{s}^{a}$	$6.0 \times 10^{- 27} m^{2}$
$σ_{s}^{e}$	$3.58 \times 10^{- 25} m^{2}$
$N_{0}$	$3.5 \times 10^{25} m^{- 3}$