High-power intracavity single-cycle THz pulse generation using thin lithium niobate

Wang, Yicheng; Vogel, Tim; Khalili, Mohsen; Mansourzadeh, Samira; Hasse, Kore; Suntsov, Sergiy; Kip, Detlef; Saraceno, Clara J.

doi:10.1364/optica.504513

High-power intracavity single-cycle THz pulse generation using thin lithium niobate

Publication date

2023-12-18

Document type

Forschungsartikel

Author

Wang, Yicheng

Vogel, Tim

Khalili, Mohsen

Mansourzadeh, Samira

Hasse, Kore

Suntsov, Sergiy

Kip, Detlef

Saraceno, Clara J.

Organisational unit

Experimentalphysik und Materialwissenschaften

DOI

10.1364/optica.504513

URI

https://openhsu.ub.hsu-hh.de/handle/10.24405/19896

Publisher

Optica Publishing Group

Series or journal

Optica

ISSN

2334-2536

Periodical volume

10

Periodical issue

12

First page

1719

Last page

1722

Part of the university bibliography

✅

Language

English

Abstract

Ultrafast laser driven, single-cycle THz pulsed sources hold immense potential for scientific and industrial applications; however, their limited average power hinders their widespread application. In particular, applications where high repetition rates in the multi-MHz region and beyond are required are more severely affected, due to the lower pulse energies available for frequency conversion. In this respect, resonant enhancement both in passive and active resonators is a well-known technique for boosting the efficiency of nonlinear frequency conversion; however, this route has remained poorly explored for the generation of broadband THz pulses due to the inadequacy of typically employed nonlinear crystals. Here, we demonstrate that using thin lithium niobate crystals inside multimode diode-pumped mode-locked thin-disk lasers is a promising platform to circumvent these difficulties. Using a 50 µm thin lithium niobate plate intracavity of a compact high-power mode-locked thin-disk laser, we generate milliwatt-level broadband THz pulses with a spectrum extending up to 3 THz at 44.8 MHz repetition rate, driven by 264 W of intracavity average power. This approach opens the door to efficient high-power single-cycle THz generation using affordable nonlinear crystals at very high repetition rates, scalable to kilowatt-level driving power with low cost and complexity.

Description

Published by Optica Publishing Group under the terms of the Creative Commons Attribution 4.0 License (https://creativecommons.org/licenses/by/4.0/).

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High-power intracavity single-cycle THz pulse generation using thin lithium niobate