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On-chip optical parametric oscillation into the visible: generating red, orange, yellow, and green from a near-infrared pump

TitleOn-chip optical parametric oscillation into the visible: generating red, orange, yellow, and green from a near-infrared pump
Publication TypeJournal Article
Year of Publication2020
AuthorsX. Lu, G. Moille, A. Rao, D. A. Westly, and K. Srinivasan
JournalOptica
Volume7
Pagination1417–1425
Date Publishedoct
ISSN2334-2536
Abstract

The on-chip generation of coherent, single-frequency laser light that can be tuned across the visible spectrum would help enable a variety of applications in spectroscopy, metrology, and quantum science. Recently, third-order optical parametric oscillation (OPO) in a microresonator has shown great promise as an efficient and scalable approach toward this end. However, considering visible light generation, so far only red light at {\textless}420 THz (near the edge of the visible band) has been reported. In this work, we overcome strong material dispersion at visible wavelengths and demonstrate on-chip OPO in a Si3N4 microresonator covering {\textgreater}130 THz of the visible spectrum, including red, orange, yellow, and green wavelengths. In particular, using an input pump laser that is scanned 5 THz in the near-infrared from 386 THz to 391 THz, the OPO output signal is tuned from the near-infrared at 395 THz to the visible at 528 THz, while the OPO output idler is tuned from the near-infrared at 378 THz to the infrared at 254 THz. The widest signal-idler separation of 274 THz is more than an octave in span and is the widest demonstrated for a nanophotonic OPO to date. More generally, our work shows how nonlinear nanophotonics can transform light from readily accessible compact near-infrared lasers to targeted visible wavelengths of interest. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

DOI10.1364/OPTICA.393810