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Robust phase retrieval using group-delay-dispersion-scanned second harmonic generation demonstrated in a femtosecond fiber chirped-pulse amplification system

Robust phase retrieval using group-delay-dispersion-scanned second harmonic generation demonstrated in a femtosecond fiber chirped-pulse amplification system
Robust phase retrieval using group-delay-dispersion-scanned second harmonic generation demonstrated in a femtosecond fiber chirped-pulse amplification system
We propose and demonstrate a phase retrieval method using a novel variant of the dispersion scan (‘d-scan’) technique via both simulations and experimental measurements on a femtosecond fiber laser. The method combines a map of group-delay-dispersion-scanned (d-scan) second-harmonic generation (SHG) spectra together with the fundamental spectrum as inputs. In order to ensure the technique is robust when pulse-to-pulse fluctuations are present, we use only the wavelengths of the resulting SHG peaks, and avoid the areas with low signal in the borders of the data trace. Simulations confirmed the phase-retrieval is accurate even with high levels of laser fluctuation. The trade-off is that pulses which have abruptly changing or highly modulated phase profiles are not retrievable. The d-scan uses the compressor gratings intrinsic to the fiber chirped-pulse amplification (CPA) systems so the method is low cost. For experimental verification, we used a 470 fs ytterbium-fiber CPA system, so the method is applicable to measurements on industrial fs fiber laser systems which generally have an order of magnitude less bandwidth than the Ti:sapphire lasers used to test earlier variants of the d-scan approach.
Fiber optics amplifiers and oscillators, , Ultrafast measurements, , Ultrafast nonlinear optics
0018-9197
Feng, Yujun
25a28374-33d9-478f-9bd2-98f0d93231af
Nilsson, Johan
f41d0948-4ca9-4b93-b44d-680ca0bf157b
Price, Jonathan
fddcce17-291b-4d01-bd38-8fb0453abdc8
Feng, Yujun
25a28374-33d9-478f-9bd2-98f0d93231af
Nilsson, Johan
f41d0948-4ca9-4b93-b44d-680ca0bf157b
Price, Jonathan
fddcce17-291b-4d01-bd38-8fb0453abdc8

Feng, Yujun, Nilsson, Johan and Price, Jonathan (2018) Robust phase retrieval using group-delay-dispersion-scanned second harmonic generation demonstrated in a femtosecond fiber chirped-pulse amplification system. IEEE Journal of Quantum Electronics. (doi:10.1109/JQE.2018.2850444).

Record type: Article

Abstract

We propose and demonstrate a phase retrieval method using a novel variant of the dispersion scan (‘d-scan’) technique via both simulations and experimental measurements on a femtosecond fiber laser. The method combines a map of group-delay-dispersion-scanned (d-scan) second-harmonic generation (SHG) spectra together with the fundamental spectrum as inputs. In order to ensure the technique is robust when pulse-to-pulse fluctuations are present, we use only the wavelengths of the resulting SHG peaks, and avoid the areas with low signal in the borders of the data trace. Simulations confirmed the phase-retrieval is accurate even with high levels of laser fluctuation. The trade-off is that pulses which have abruptly changing or highly modulated phase profiles are not retrievable. The d-scan uses the compressor gratings intrinsic to the fiber chirped-pulse amplification (CPA) systems so the method is low cost. For experimental verification, we used a 470 fs ytterbium-fiber CPA system, so the method is applicable to measurements on industrial fs fiber laser systems which generally have an order of magnitude less bandwidth than the Ti:sapphire lasers used to test earlier variants of the d-scan approach.

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Robust phase retrieval using group-delay-dispersion-scanned second harmonic generation demonstrated in a femtosecond fiber chirped-pulse amplification system - Accepted Manuscript
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Submitted date: 22 February 2018
Accepted/In Press date: 25 June 2018
e-pub ahead of print date: 25 June 2018
Keywords: Fiber optics amplifiers and oscillators, , Ultrafast measurements, , Ultrafast nonlinear optics

Identifiers

Local EPrints ID: 421729
URI: http://eprints.soton.ac.uk/id/eprint/421729
ISSN: 0018-9197
PURE UUID: da9acdb6-2708-478a-9f30-0426ed695502
ORCID for Yujun Feng: ORCID iD orcid.org/0000-0001-7839-065X
ORCID for Johan Nilsson: ORCID iD orcid.org/0000-0003-1691-7959
ORCID for Jonathan Price: ORCID iD orcid.org/0000-0003-0256-9172

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Date deposited: 25 Jun 2018 16:30
Last modified: 07 Oct 2020 01:49

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Contributors

Author: Yujun Feng ORCID iD
Author: Johan Nilsson ORCID iD
Author: Jonathan Price ORCID iD

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