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Nonlinear dynamic of picosecond pulse propagation in atmospheric air-filled hollow core fibers

Nonlinear dynamic of picosecond pulse propagation in atmospheric air-filled hollow core fibers
Nonlinear dynamic of picosecond pulse propagation in atmospheric air-filled hollow core fibers

Atmospheric air-filled hollow core (HC) fibers, representing the simplest yet reliable form of gas-filled hollow core fiber, show remarkable nonlinear properties and have several interesting applications such as pulse compression, frequency conversion and supercontinuum generation. Although the propagation of sub-picosecond and few hundred picosecond pulses are well-studied in air-filled fibers, the nonlinear response of air to pulses with a duration of a few picoseconds has interesting features that have not yet been explored fully. Here, we experimentally and theoretically study the nonlinear propagation of ∼6 ps pulses in three different types of atmospheric air-filled HC fiber. With this pulse length, we were able to explore different nonlinear characteristics of air at different power levels. Using in-house-fabricated, state-of-the-art HC photonic bandgap, HC tubular and HC Kagomé fibers, we were able to associate the origin of the initial pulse broadening process in these fibers to rotational Raman scattering (RRS) at low power levels. Due to the broadband and low loss transmission window of the HC Kagomé fiber we used, we observed the transition from initial pulse broadening (by RRS) at lower powers, through long-range frequency conversion (2330 cm-1) with the help of vibrational Raman scattering, to broadband (∼700 nm) supercontinuum generation at high power levels. To model such a wide range of nonlinear processes in a unified approach, we have implemented a semi-quantum model for air into the generalized nonlinear Schrodinger equation, which surpasses the limits of the common single damping oscillator model in this pulse length regime. The model has been validated by comparison with experimental results and provides a powerful tool for the design, modeling and optimization of nonlinear processes in air-filled HC fibers.

1094-4087
8866-8882
Abokhamis Mousavi, Seyedmohammad
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Mulvad, Hans Christian Hansen
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Wheeler, Natalie V.
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Horak, Peter
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Hayes, John
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Chen, Yong
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Bradley, Thomas D.
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Alam, Shaif Ul
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Sandoghchi, Seyed Reza
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Numkam Fokoua, Eric
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Richardson, David J.
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3
Poletti, Francesco
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Abokhamis Mousavi, Seyedmohammad
f0229dbe-bd17-479b-9ba1-f26f55cf3054
Mulvad, Hans Christian Hansen
b461b05f-88f2-4f28-b20a-e45cf258f456
Wheeler, Natalie V.
0fd34178-a77b-4c71-a3a6-86a1f634f1a0
Horak, Peter
520489b5-ccc7-4d29-bb30-c1e36436ea03
Hayes, John
f20b8af0-900c-465a-942d-ed6a539ffa9a
Chen, Yong
0bfb3083-4cd2-4463-a7a4-f48c4158b15a
Bradley, Thomas D.
d4cce4f3-bb69-4e14-baee-cd6a88e38101
Alam, Shaif Ul
2b6bdbe5-ddcc-4a88-9057-299360b93435
Sandoghchi, Seyed Reza
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Numkam Fokoua, Eric
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Richardson, David J.
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3
Poletti, Francesco
9adcef99-5558-4644-96d7-ce24b5897491

Abokhamis Mousavi, Seyedmohammad, Mulvad, Hans Christian Hansen, Wheeler, Natalie V., Horak, Peter, Hayes, John, Chen, Yong, Bradley, Thomas D., Alam, Shaif Ul, Sandoghchi, Seyed Reza, Numkam Fokoua, Eric, Richardson, David J. and Poletti, Francesco (2018) Nonlinear dynamic of picosecond pulse propagation in atmospheric air-filled hollow core fibers. Optics Express, 26 (7), 8866-8882. (doi:10.1364/OE.26.008866).

Record type: Article

Abstract

Atmospheric air-filled hollow core (HC) fibers, representing the simplest yet reliable form of gas-filled hollow core fiber, show remarkable nonlinear properties and have several interesting applications such as pulse compression, frequency conversion and supercontinuum generation. Although the propagation of sub-picosecond and few hundred picosecond pulses are well-studied in air-filled fibers, the nonlinear response of air to pulses with a duration of a few picoseconds has interesting features that have not yet been explored fully. Here, we experimentally and theoretically study the nonlinear propagation of ∼6 ps pulses in three different types of atmospheric air-filled HC fiber. With this pulse length, we were able to explore different nonlinear characteristics of air at different power levels. Using in-house-fabricated, state-of-the-art HC photonic bandgap, HC tubular and HC Kagomé fibers, we were able to associate the origin of the initial pulse broadening process in these fibers to rotational Raman scattering (RRS) at low power levels. Due to the broadband and low loss transmission window of the HC Kagomé fiber we used, we observed the transition from initial pulse broadening (by RRS) at lower powers, through long-range frequency conversion (2330 cm-1) with the help of vibrational Raman scattering, to broadband (∼700 nm) supercontinuum generation at high power levels. To model such a wide range of nonlinear processes in a unified approach, we have implemented a semi-quantum model for air into the generalized nonlinear Schrodinger equation, which surpasses the limits of the common single damping oscillator model in this pulse length regime. The model has been validated by comparison with experimental results and provides a powerful tool for the design, modeling and optimization of nonlinear processes in air-filled HC fibers.

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Accepted/In Press date: 28 February 2018
e-pub ahead of print date: 27 March 2018
Published date: 2 April 2018

Identifiers

Local EPrints ID: 419632
URI: https://eprints.soton.ac.uk/id/eprint/419632
ISSN: 1094-4087
PURE UUID: 18f7c7e1-c293-4ce6-b4e1-1953bece7520
ORCID for Hans Christian Hansen Mulvad: ORCID iD orcid.org/0000-0003-2552-0742
ORCID for Natalie V. Wheeler: ORCID iD orcid.org/0000-0002-1265-9510
ORCID for Peter Horak: ORCID iD orcid.org/0000-0002-8710-8764
ORCID for Yong Chen: ORCID iD orcid.org/0000-0003-0383-6113
ORCID for Thomas D. Bradley: ORCID iD orcid.org/0000-0001-6568-5811
ORCID for Seyed Reza Sandoghchi: ORCID iD orcid.org/0000-0003-2196-3167
ORCID for Eric Numkam Fokoua: ORCID iD orcid.org/0000-0003-0873-911X
ORCID for David J. Richardson: ORCID iD orcid.org/0000-0002-7751-1058
ORCID for Francesco Poletti: ORCID iD orcid.org/0000-0002-1000-3083

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Date deposited: 17 Apr 2018 16:30
Last modified: 14 Mar 2019 01:54

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Contributors

Author: Seyedmohammad Abokhamis Mousavi
Author: Peter Horak ORCID iD
Author: John Hayes
Author: Yong Chen ORCID iD
Author: Shaif Ul Alam

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