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Photon Acceleration in a Flying Focus

Journal Article · · Physical Review Letters
 [1];  [2];  [2];  [2];  [2];  [2]
  1. Univ. of Rochester, Rochester, NY (United States). Lab for Laser Energetics; Laboratory for Laser Energetics, University of Rochester
  2. Univ. of Rochester, Rochester, NY (United States). Lab for Laser Energetics

A high-intensity laser pulse propagating through a medium triggers an ionization front that can accelerate and frequency-upshift the photons of a second pulse. Here, the maximum upshift is ultimately limited by the accelerated photons outpacing the ionization front or the ionizing pulse refracting from the plasma. Here we apply the flying focus—a moving focal point resulting from a chirped laser pulse focused by a chromatic lens—to overcome these limitations. Theory and simulations demonstrate that the ionization front produced by a flying focus can frequency-upshift an ultrashort optical pulse to the extreme ultraviolet over a centimeter of propagation. An analytic model of the upshift predicts that this scheme could be scaled to a novel table-top source of spatially coherent x-rays.

Research Organization:
Univ. of Rochester, Rochester, NY (United States). Lab for Laser Energetics
Sponsoring Organization:
USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24); USDOE National Nuclear Security Administration (NNSA)
Contributing Organization:
Laboratory for Laser Energetics, University of Rochester
Grant/Contract Number:
NA0001944
OSTI ID:
1566142
Report Number(s):
2019-46, 2477, 1517; 2019-46, 2477, 1517
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 12 Vol. 123; ISSN 0031-9007; ISSN PRLTAO
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (2)

Dephasingless Laser Wakefield Acceleration journal March 2020
Controlling the velocity of a femtosecond laser pulse using refractive lenses journal January 2020

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