A high repetition rate picosecond LiNbO3 THz parametric amplifier and the parametric gain study

TL;DR

This paper demonstrates a high repetition rate picosecond THz parametric amplifier using LiNbO3, achieving significant peak and average powers at different repetition rates, and investigates its parametric gain with a new model.

Contribution

The work introduces a high repetition rate LiNbO3-based THz parametric amplifier and a modified Schwarz-Maier model for gain analysis, advancing THz source technology.

Findings

Peak power of 200 W at 10 kHz

Maximum peak power of 18 W at 100 kHz

Modified Schwarz-Maier model explains experimental gain results

Abstract

A high repetition rate, picosecond THz parametric amplifier (TPA) with a LiNbO3 (LN) crystal has been demonstrated in this work. At 10 kHz repetition rate, a peak power of 200 W and an average power of 12 {\mu}W have been obtained over a wide range around 2 THz; at 100 kHz repetition rate, a maximum peak power of 18 W and average power of 10.8 {\mu}W have been obtained. The parametric gain of the LN crystal was also investigated and a modified Schwarz-Maier model was introduced to interpret the experimental results.