Open AccessHighly efficient generation of 02 mJ terahertz pulses in lithium niobate at room temperature with sub-50 fs chirped Ti:sapphire laser pulses
Author(s) -
Xiaojun Wu,
Jing Ma,
Baolong Zhang,
Shusu Chai,
Zhaoji Fang,
Chenyi Xia,
Deyin Kong,
Jinguang Wang,
Hao Liu,
Changqing Zhu,
Xuan Wang,
Cunjun Ruan,
Yutong Li
Publication year - 2018
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.007107
Subject(s) - materials science , lithium niobate , optics , laser , sapphire , terahertz radiation , ti:sapphire laser , optical rectification , optoelectronics , chirp , nonlinear optics , physics
We demonstrate generation of 0.2 mJ terahertz (THz) pulses in lithium niobate driven by Ti:sapphire laser pulses at room temperature. Employing tilted pulse front technique, the 800 nm-to-THz energy conversion efficiency has been optimized to 0.3% through chirping the sub-50 fs pump laser pulses to overcome multi-photon absorption and to extend effective interaction length for phase matching. Our approach paves the way for mJ-level THz generation via optical rectification using existing Ti:sapphire laser systems which can deliver Joule-level pulse energy with sub-50 fs pulse duration.