0.7 MW Yb:YAG pumped degenerate optical parametric oscillator at 2.06 {\mu}m
Abstract
Frequency comb and field-resolved broadband absorption spectroscopy are promising techniques for rapid, precise, and sensitive detection of short-lived atmospheric pollutants on-site. Enhancing detection sensitivity in absorption spectroscopy hinges on bright sources that cover molecular resonances and fast signal modulation techniques to implement lock-in detection schemes efficiently. Yb:YAG thin-disk lasers, combined with optical parametric oscillators (OPO), present a compelling solution to fulfill these requirements. In this work, we report on a bright OPO pumped by a Yb:YAG thin-disk Kerr-lens mode-locked oscillator delivering 2.8 W, 114 fs pulses at 2.06 {\mu}m with an averaged energy of 90 nJ. The OPO cavity operates at 30.9 MHz pulse repetition rates, the second harmonic of the pump cavity, allowing for broadband, efficient, and dispersion-free modulation of the OPO output pulses at 15.45 MHz rate. With 13% optical-to-optical conversion efficiency and a high-frequency intra-cavity modulation, this scalable scheme holds promise to advance the detection sensitivity and frontiers of field-resolved spectroscopic techniques.
Keywords
Cite
@article{arxiv.2407.13371,
title = {0.7 MW Yb:YAG pumped degenerate optical parametric oscillator at 2.06 {\mu}m},
author = {Anni Li and Mehran Bahri and Robert M. Gray and Seowon Choi and Sajjad Hoseinkhani and Anchit Srivastava and Alireza Marandi and Hanieh Fattahi},
journal= {arXiv preprint arXiv:2407.13371},
year = {2024}
}