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.
8866-8882
Abokhamis Mousavi, Seyed mohammad
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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.
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Poletti, Francesco
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2 April 2018
Abokhamis Mousavi, Seyed mohammad
5cde8762-0a43-461c-a124-857d1aca102b
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
a6d3acd6-d7d5-4614-970e-0e8c594e48e2
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
15499707-d3f2-42f1-90e2-cbe260462487
Numkam Fokoua, Eric
6d9f7e50-dc3b-440a-a0b9-f4a08dd02ccd
Richardson, David J.
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3
Poletti, Francesco
9adcef99-5558-4644-96d7-ce24b5897491
Abokhamis Mousavi, Seyed mohammad, 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), .
(doi:10.1364/OE.26.008866).
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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oe-26-7-8866
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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: http://eprints.soton.ac.uk/id/eprint/419632
ISSN: 1094-4087
PURE UUID: 18f7c7e1-c293-4ce6-b4e1-1953bece7520
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Date deposited: 17 Apr 2018 16:30
Last modified: 12 Nov 2024 03:02
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