Mid-infrared frequency comb with 25 pJ threshold via CW-seeded optical parametric generation in nonlinear waveguide

Mikhail Roiz*, Jui Yu Lai, Juho Karhu, Markku Vainio

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

Abstract

We demonstrate efficient generation of mid-infrared frequency combs based on continuous-wave-seeded femtosecond optical parametric generation in nonlinear waveguides. Conversion of the near-infrared pump to signal and idler light takes place with very high efficiency (74%), and the threshold (25 pJ for 100 fs pulses) is over 300 times lower than in bulk analogs. Relative intensity noise of the mid-infrared comb is exceptionally low, below 5 × 105 (integrated from 10 Hz to 2 MHz). Furthermore, the mid-infrared bandwidth can be increased by driving the process with a broadband pump obtained via supercontinuum generation.

Original languageEnglish
Pages (from-to)4037-4040
Number of pages4
JournalOptics Letters
Volume46
Issue number16
DOIs
Publication statusPublished - 15 Aug 2021
MoE publication typeA1 Journal article-refereed

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