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Title: Population inversion X-ray laser oscillator

Abstract

Oscillators are at the heart of optical lasers, providing stable, transform-limited pulses. Until now, laser oscillators have been available only in the infrared to visible and near-ultraviolet (UV) spectral region. In this paper, we present a study of an oscillator operating in the 5- to 12-keV photon-energy range. We show that, using the Kα1 line of transition metal compounds as the gain medium, an X-ray free-electron laser as a periodic pump, and a Bragg crystal optical cavity, it is possible to build X-ray oscillators producing intense, fully coherent, transform-limited pulses. As an example, we consider the case of a copper nitrate gain medium generating ~ 5 × 1010 photons per pulse with 37-fs pulse length and 48-meV spectral resolution at 8-keV photon energy. Our theoretical study and simulation of this system show that, because of the very large gain per pass, the oscillator saturates and reaches full coherence in four to six optical-cavity transits. We discuss the feasibility and design of the X-ray optical cavity and other parts of the oscillator needed for its realization, opening the way to extend X-ray–based research beyond current capabilities.

Authors:
; ; ORCiD logo; ; ORCiD logo; ; ORCiD logo; ORCiD logo
Publication Date:
Research Org.:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1634236
Alternate Identifier(s):
OSTI ID: 1646808; OSTI ID: 1660281
Grant/Contract Number:  
AC02-76SF00515
Resource Type:
Published Article
Journal Name:
Proceedings of the National Academy of Sciences of the United States of America
Additional Journal Information:
Journal Name: Proceedings of the National Academy of Sciences of the United States of America Journal Volume: 117 Journal Issue: 27; Journal ID: ISSN 0027-8424
Publisher:
National Academy of Sciences
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION; X-ray laser; amplified spontaneous emission; X-ray cavity; transform-limited pulses

Citation Formats

Halavanau, Aliaksei, Benediktovitch, Andrei, Lutman, Alberto A., DePonte, Daniel, Cocco, Daniele, Rohringer, Nina, Bergmann, Uwe, and Pellegrini, Claudio. Population inversion X-ray laser oscillator. United States: N. p., 2020. Web. doi:10.1073/pnas.2005360117.
Halavanau, Aliaksei, Benediktovitch, Andrei, Lutman, Alberto A., DePonte, Daniel, Cocco, Daniele, Rohringer, Nina, Bergmann, Uwe, & Pellegrini, Claudio. Population inversion X-ray laser oscillator. United States. https://doi.org/10.1073/pnas.2005360117
Halavanau, Aliaksei, Benediktovitch, Andrei, Lutman, Alberto A., DePonte, Daniel, Cocco, Daniele, Rohringer, Nina, Bergmann, Uwe, and Pellegrini, Claudio. Mon . "Population inversion X-ray laser oscillator". United States. https://doi.org/10.1073/pnas.2005360117.
@article{osti_1634236,
title = {Population inversion X-ray laser oscillator},
author = {Halavanau, Aliaksei and Benediktovitch, Andrei and Lutman, Alberto A. and DePonte, Daniel and Cocco, Daniele and Rohringer, Nina and Bergmann, Uwe and Pellegrini, Claudio},
abstractNote = {Oscillators are at the heart of optical lasers, providing stable, transform-limited pulses. Until now, laser oscillators have been available only in the infrared to visible and near-ultraviolet (UV) spectral region. In this paper, we present a study of an oscillator operating in the 5- to 12-keV photon-energy range. We show that, using the Kα1 line of transition metal compounds as the gain medium, an X-ray free-electron laser as a periodic pump, and a Bragg crystal optical cavity, it is possible to build X-ray oscillators producing intense, fully coherent, transform-limited pulses. As an example, we consider the case of a copper nitrate gain medium generating ~ 5 × 1010 photons per pulse with 37-fs pulse length and 48-meV spectral resolution at 8-keV photon energy. Our theoretical study and simulation of this system show that, because of the very large gain per pass, the oscillator saturates and reaches full coherence in four to six optical-cavity transits. We discuss the feasibility and design of the X-ray optical cavity and other parts of the oscillator needed for its realization, opening the way to extend X-ray–based research beyond current capabilities.},
doi = {10.1073/pnas.2005360117},
journal = {Proceedings of the National Academy of Sciences of the United States of America},
number = 27,
volume = 117,
place = {United States},
year = {Mon Jun 22 00:00:00 EDT 2020},
month = {Mon Jun 22 00:00:00 EDT 2020}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1073/pnas.2005360117

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Cited by: 22 works
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