Journal Article

PUBDB-2016-03092

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Cascaded parametric amplification for highly efficient terahertz generation

Ravi, K. (Corresponding author)Extern* ; Hemmer, M.CFEL*DESY* ; Cirmi, G.CFEL*DESY* ; Reichert, F.Extern* ; Barre, D.CFEL*DESY* ; Mücke, O. D.CFEL*DESY* ; Kärtner, F. X.CFEL*DESY*

2016
Soc. Washington, DC

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Please use a persistent id in citations: doi:10.1364/OL.41.003806  doi:10.3204/PUBDB-2016-03092

Abstract: A highly efficient, practical approach to high-energy multi-cycle terahertz (THz) generation based on spectrally cascaded optical parametric amplification (THz-COPA) is introduced. Feasible designs are presented that enable the THz wave, initially generated by difference frequency generation between a narrowband optical pump and optical seed (0.1–10% of pump energy), to self-start a cascaded (or repeated) energy downconversion of pump photons in a single pass through a single crystal. In cryogenically cooled, periodically poled lithium niobate, unprecedented energy conversion efficiencies >8% achievable with existing pump laser technology are predicted using realistic simulations. The calculations account for cascading effects, absorption, dispersion, and laser-induced damage. Due to the simultaneous, coupled nonlinear evolution of multiple phase-matched three-wave mixing processes, THz-COPA exhibits physics distinctly different from conventional three-wave mixing parametric amplifiers. This, in turn, governs optimal phase-matching conditions, evolution of optical spectra, and limitations of the nonlinear process. Circumventing these limitations is shown to yield conversion efficiencies ≫10%.

Note: (c) Optical Society of America

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Contributing Institute(s):

1. Ultrafast Lasers & X-rays Division (FS-CFEL-2)

Research Program(s):

1. 631 - Accelerator R & D (POF3-631) (POF3-631)
2. AXSIS - Frontiers in Attosecond X-ray Science: Imaging and Spectroscopy (609920) (609920)
3. CUI - Hamburger Zentrum für ultraschnelle Beobachtung (194651731) (194651731)

Experiment(s):

1. Experiments at CFEL

Appears in the scientific report 2016

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Database coverage:
; ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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