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Title: Raman Amplification with a Flying Focus

Abstract

Here, we propose a new laser amplifier scheme utilizing stimulated Raman scattering in plasma in conjunction with a "flying focus" - a chromatic focusing system combined with a chirped pump beam that provides spatiotemporal control over the pump's focal spot. Pump intensity isosurfaces are made to propagate at v=-c so as to be in sync with the injected counterpropagating seed pulse. By setting the pump intensity in the interaction region to be just about the ionization threshold of the background gas, an ionization wave is produced that travels at a fixed distance ahead of the seed. Simulations show that this will make it possible to optimize the plasma temperature and mitigate many of the issues that are known to have impacted previous Raman amplification experiments, in particular, the growth of precursors.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1]
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  1. Univ. of Rochester, Rochester, NY (United States)
Publication Date:
Research Org.:
Univ. of Rochester, NY (United States). Lab. for Laser Energetics
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1417648
Alternate Identifier(s):
OSTI ID: 1416843
Report Number(s):
2017-179, 1366
Journal ID: ISSN 0031-9007; PRLTAO; 2017-179, 2322, 1366; TRN: US1801096
Grant/Contract Number:  
NA0001944; SC0016253
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 120; Journal Issue: 2; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Turnbull, D., Bucht, S., Davies, A., Haberberger, D., Kessler, T., Shaw, J. L., and Froula, D. H. Raman Amplification with a Flying Focus. United States: N. p., 2018. Web. doi:10.1103/PhysRevLett.120.024801.
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Turnbull, D., Bucht, S., Davies, A., Haberberger, D., Kessler, T., Shaw, J. L., & Froula, D. H. Raman Amplification with a Flying Focus. United States. https://doi.org/10.1103/PhysRevLett.120.024801
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Turnbull, D., Bucht, S., Davies, A., Haberberger, D., Kessler, T., Shaw, J. L., and Froula, D. H. Fri . "Raman Amplification with a Flying Focus". United States. https://doi.org/10.1103/PhysRevLett.120.024801. https://www.osti.gov/servlets/purl/1417648.
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@article{osti_1417648,
title = {Raman Amplification with a Flying Focus},
author = {Turnbull, D. and Bucht, S. and Davies, A. and Haberberger, D. and Kessler, T. and Shaw, J. L. and Froula, D. H.},
abstractNote = {Here, we propose a new laser amplifier scheme utilizing stimulated Raman scattering in plasma in conjunction with a "flying focus" - a chromatic focusing system combined with a chirped pump beam that provides spatiotemporal control over the pump's focal spot. Pump intensity isosurfaces are made to propagate at v=-c so as to be in sync with the injected counterpropagating seed pulse. By setting the pump intensity in the interaction region to be just about the ionization threshold of the background gas, an ionization wave is produced that travels at a fixed distance ahead of the seed. Simulations show that this will make it possible to optimize the plasma temperature and mitigate many of the issues that are known to have impacted previous Raman amplification experiments, in particular, the growth of precursors.},
doi = {10.1103/PhysRevLett.120.024801},
journal = {Physical Review Letters},
number = 2,
volume = 120,
place = {United States},
year = {Fri Jan 12 00:00:00 EST 2018},
month = {Fri Jan 12 00:00:00 EST 2018}
}
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Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1103/PhysRevLett.120.024801
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Citation Metrics:
Cited by: 41 works
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Figures / Tables:

Figure 1 Figure 1: A negatively linearly chirped pump combined with a chromatic focusing system causes the high intensity focus to propagate backwards at $\mathcal{v ≈ −c}$ when the pump duration is 2$\mathcal{l/c}$, where $\mathcal{l}$ is the distance between the focii of the pump’s bandwidth extrema.
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Works referenced in this record:

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    Works referencing / citing this record:

    Optical space-time wave packets having arbitrary group velocities in free space
    journal, February 2019

    Spatiotemporal control of laser intensity
    journal, March 2018

    Enhancement and control of laser wakefields via a backward Raman amplifier
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    • Ludwig, J. D.; Masson-Laborde, P. -E.; Hüller, S.
    • Physics of Plasmas, Vol. 25, Issue 5
    • DOI: 10.1063/1.5023387

    Cascaded chirped photon acceleration for efficient frequency conversion
    journal, May 2018

    • Edwards, Matthew R.; Qu, Kenan; Jia, Qing
    • Physics of Plasmas, Vol. 25, Issue 5
    • DOI: 10.1063/1.5030022

    Stimulated Raman near-backscattering with a pulse-front-tilted pump
    journal, September 2018

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    • Physics of Plasmas, Vol. 25, Issue 9
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    Flying focus: Spatial and temporal control of intensity for laser-based applications
    journal, March 2019

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    Stimulated Raman backscattering amplification with a low-intensity pump
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    • Wu, Z.; Chen, Q.; Morozov, A.
    • Physics of Plasmas, Vol. 26, Issue 10
    • DOI: 10.1063/1.5094744

    Compression of laser pulses by near-forward Raman amplification in plasma
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    • Wu, Z.; Chen, Q.; Morozov, A.
    • Physics of Plasmas, Vol. 27, Issue 1
    • DOI: 10.1063/1.5116909

    Flying focus and its application to plasma-based laser amplifiers
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    • Turnbull, D.; Bahk, S-W; Begishev, I. A.
    • Plasma Physics and Controlled Fusion, Vol. 61, Issue 1
    • DOI: 10.1088/1361-6587/aada63

    Simultaneous polarization transformation and amplification of multi-petawatt laser pulses in magnetized plasmas
    journal, January 2019

    • Zheng, Xiaolong; Weng, Suming; Zhang, Zhe
    • Optics Express, Vol. 27, Issue 14
    • DOI: 10.1364/oe.27.019319

    Control of laser light by a plasma immersed in a tunable strong magnetic field
    journal, January 2019

    • Zheng, Xiaolong; Weng, Suming; Ma, Hanghang
    • Optics Express, Vol. 27, Issue 16
    • DOI: 10.1364/oe.27.023529

    Ionization waves of arbitrary velocity driven by a flying focus
    text, January 2017

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