Parameter dependencies in multicycle THz generation with tunable high-energy pulse trains in large-aperture crystals

C. Rentschler; N. H. Matlis; U. Demirbas; Z. Zhang; M. Pergament; A. Zukauskas; C. Canalias; H. Ishizuki; V. Pasiskevicius; F. Laurell; T. Taira; F. X. Kärtner

doi:10.1117/12.3003195

12 March 2024 Parameter dependencies in multicycle THz generation with tunable high-energy pulse trains in large-aperture crystals

C. Rentschler, N. H. Matlis, U. Demirbas, Z. Zhang, M. Pergament, A. Zukauskas, C. Canalias, H. Ishizuki, V. Pasiskevicius, F. Laurell, T. Taira, F. X. Kärtner

Author Affiliations +

Proceedings Volume 12869, Nonlinear Frequency Generation and Conversion: Materials and Devices XXIII; 128690M (2024) https://doi.org/10.1117/12.3003195
Event: SPIE LASE, 2024, San Francisco, California, United States

Abstract

Efficiencies of nonlinear optical-to-terahertz (THz) conversion below one percent remain a limiting factor for applications of multicycle THz radiation like THz-driven acceleration and inspired the use of multi-line pump spectra. To overcome the difficulty of phase stabilization of multiple narrowband sources required by the multi-line approach, we exploit its temporal analog, i.e., regular pulse trains with THz repetition rate, in which the THz waves generated by rectifying the individual pulses add coherently. The optical setup producing the pulse trains consists of motorized interferometers and enables precise control over the pulse train parameters like pulse spacing and amplitude. It is operated with a laser providing 400 fs pulses and energies of up to 110 mJ, which is the highest yet attempted for a pulse-train-type experiment. Opposed to earlier work, pulse division is done after amplification making the system more flexible in terms of tuning the pulse number. We present initial results of an experimental campaign of multicycle THz generation in custom periodically poled crystals with large apertures up to 10x20 mm². The available pump energy allows filling these apertures at high fluences, promising increased THz yields. We investigate the dependence of the conversion efficiency on the single pulse duration and aim to find the optimum pulse number for different crystal lengths to determine the efficiency limitations in a regime avoiding laser-induced damage. Since crystal length and pulse number define the bandwidth of the THz pulses, this work demonstrates a path to an optimized THz source tunable to different requirements of applications.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

C. Rentschler, N. H. Matlis, U. Demirbas, Z. Zhang, M. Pergament, A. Zukauskas, C. Canalias, H. Ishizuki, V. Pasiskevicius, F. Laurell, T. Taira, and F. X. Kärtner "Parameter dependencies in multicycle THz generation with tunable high-energy pulse trains in large-aperture crystals", Proc. SPIE 12869, Nonlinear Frequency Generation and Conversion: Materials and Devices XXIII, 128690M (12 March 2024); https://doi.org/10.1117/12.3003195

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available