Simulation and analysis of supercontinuum generation in the waveband up to 25 µm

Weiqing Gao; Wenwen Dai; Ziqi Zheng; Kai Chen; Yiqi Chu; Qiaoxia Luo; Xian Wang; Kai Zhang; Song Huang; Yong Zhou; Wentan Fang; Xiaolin Chen; Xiaohui Ma; Meisong Liao

doi:10.1364/AO.461675

Applied Optics
Vol. 61,
Issue 23,
pp. 6697-6703
(2022)
•https://doi.org/10.1364/AO.461675

Simulation and analysis of supercontinuum generation in the waveband up to 25 µm

Weiqing Gao, Wenwen Dai, Ziqi Zheng, Kai Chen, Yiqi Chu, Qiaoxia Luo, Xian Wang, Kai Zhang, Song Huang, Yong Zhou, Wentan Fang, Xiaolin Chen, Xiaohui Ma, and Meisong Liao

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Weiqing Gao, Wenwen Dai, Ziqi Zheng, Kai Chen, Yiqi Chu, Qiaoxia Luo, Xian Wang, Kai Zhang, Song Huang, Yong Zhou, Wentan Fang, Xiaolin Chen, Xiaohui Ma, and Meisong Liao, "Simulation and analysis of supercontinuum generation in the waveband up to 25 µm," Appl. Opt. 61, 6697-6703 (2022)

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Table of Contents Category
- Fiber Optics, Fiber Sensors, and Optical Communications
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About this Article
History
- Original Manuscript: April 21, 2022
- Revised Manuscript: July 7, 2022
- Manuscript Accepted: July 12, 2022
- Published: August 2, 2022

Abstract

The ultra-wideband supercontinuum generation (SCG) in a Te-based chalcogenide (ChG) photonic crystal fiber (PCF) is simulated in the mid-infrared (MIR) waveband. The PCF core and cladding materials are ${{\rm Ge}_{20}}{{\rm As}_{20}}{{\rm Se}_{15}}{{\rm Te}_{45}}$ and ${{\rm Ge}_{20}}{{\rm As}_{20}}{{\rm Se}_{17}}{{\rm Te}_{43}}$, respectively. The supercontinuum (SC) broadening affected by the core diameter and fiber absorption is considered. The selected PCFs at different pumping wavelengths can demonstrate the generation of ultra-wideband MIR supercontinuum according to the simulated results. We consider SC broadening with and without fiber absorption. A SC range from 3 to 25 µm is demonstrated by simulation in a PCF with a core diameter of 8 µm and a pump wavelength of 6 µm considering the fiber absorption. With the increase of the peak power and the pulse width and the decrease of the core diameter, the degree of coherence gradually degraded. To the best of our knowledge, this is the first demonstration of the possibility of SCG up to the waveband of 25 µm in fiber. Our results highlight the potential of a novel Te-based chalcogenide multi-material PCF for SCG. We also provide a way to generate the SCs to longer wavebands than 20 µm in fiber, especially up to the far-infrared waveband.

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Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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Fiber Composition	Spectral Coverage (µm)	Pump Wavelength (µm)	Year
Experimental works of SCG
Ge-As-Se	1.4–13.3 (30 dB)	6.3	2014 [13]
Ge-As-Se-Te	1.5–14 (30 dB)	4.5	2016 [14]
As-Se	2–15.1 (20 dB)	9.8	2016 [15]
Ge-Te-AgI	2–16 (40 dB)	7	2017 [16]
Ge-As-Se-Te	1.7–11.3 (30 dB)	5	2018 [17]
Ge-As-Se-Te	2–14 (30 dB)	5	2019 [18]
Ge-Se-Te	2–14 (–)	7.7	2019 [19]
Ge-As-Se-Te	1.7–12.7 (30 dB)	5.5	2019 [20]
Ge-Se-Te	1.7–18 (30 dB)	8.15	2021 [21]
Simulation works of SCG
As-Se	2–15 (30 dB)	4	2015 [22]
As-Se	1.7–14 (40 dB)	3.9	2016 [23]
As-Se/As-S	1.5–20 (40 dB)	4	2020 [24]

Fiber Type	PCF1	PCF2
$d_{0}$ (µm)	10	8
$Λ$ (µm)	10	8
$d$ (µm)	9	7.2
1 $^{s t}$ ZDW (µm)	6.398	5.938
2 $^{s t}$ ZDW (µm)	12.2	12.5
Pump wavelength (µm)	6.5	6
$γ (W \cdot m)^{- 1}$	0.11	0.18
$A_{e f f}$ ( $µ m^{2}$ )	54.27	53.62

Pulse Width (fs)	$L_{D}$ (m)	$L_{N L}$ (m)	$N$	$L_{f i s s}$ (m)
50	$1.50 \times 10^{- 3}$	$1.14 \times 10^{- 4}$	4	$3.80 \times 10^{- 4}$
100	$5.90 \times 10^{- 3}$	$1.14 \times 10^{- 4}$	8	$7.40 \times 10^{- 4}$
400	$9.48 \times 10^{- 2}$	$1.14 \times 10^{- 4}$	29	$3.27 \times 10^{- 3}$
800	$3.79 \times 10^{- 1}$	$1.14 \times 10^{- 4}$	58	$6.53 \times 10^{- 3}$

Fiber Composition	Spectral Coverage (µm)	Pump Wavelength (µm)	Year
Experimental works of SCG
Ge-As-Se	1.4–13.3 (30 dB)	6.3	2014 [13]
Ge-As-Se-Te	1.5–14 (30 dB)	4.5	2016 [14]
As-Se	2–15.1 (20 dB)	9.8	2016 [15]
Ge-Te-AgI	2–16 (40 dB)	7	2017 [16]
Ge-As-Se-Te	1.7–11.3 (30 dB)	5	2018 [17]
Ge-As-Se-Te	2–14 (30 dB)	5	2019 [18]
Ge-Se-Te	2–14 (–)	7.7	2019 [19]
Ge-As-Se-Te	1.7–12.7 (30 dB)	5.5	2019 [20]
Ge-Se-Te	1.7–18 (30 dB)	8.15	2021 [21]
Simulation works of SCG
As-Se	2–15 (30 dB)	4	2015 [22]
As-Se	1.7–14 (40 dB)	3.9	2016 [23]
As-Se/As-S	1.5–20 (40 dB)	4	2020 [24]

Fiber Type	PCF1	PCF2
$d_{0}$ (µm)	10	8
$Λ$ (µm)	10	8
$d$ (µm)	9	7.2
1 $^{s t}$ ZDW (µm)	6.398	5.938
2 $^{s t}$ ZDW (µm)	12.2	12.5
Pump wavelength (µm)	6.5	6
$γ (W \cdot m)^{- 1}$	0.11	0.18
$A_{e f f}$ ( $µ m^{2}$ )	54.27	53.62

Abstract

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Applied Optics