Optical parametric amplification in silicon nitride waveguides for coherent Raman imaging

Niklas M. Lüpken*, Thomas Würthwein, Klaus J. Boller, Carsten Fallnich

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

3 Citations (Scopus)
7 Downloads (Pure)

Abstract

We present tunable waveguide-based optical parametric amplification by four-wave mixing (FWM) in silicon nitride waveguides, with the potential to be set up as an all-integrated device, for narrowband coherent anti-Stokes Raman scattering (CARS) imaging. Signal and idler pulses are generated via FWM with only 3 nJ pump pulse energy and stimulated by using only 4 mW of a continuous-wave seed source, resulting in a 35 dB enhancement of the idler spectral power density in comparison to spontaneous FWM. By using waveguides with different widths and tuning the wavelength of the signal wave seed, idler wavelengths covering the spectral region from 1.1 µm up to 1.6 µm can be generated. The versatility of the chip-based FWM light source is demonstrated by acquiring CARS images.

Original languageEnglish
Pages (from-to)10424-10433
Number of pages10
JournalOptics express
Volume29
Issue number7
Early online date18 Mar 2021
DOIs
Publication statusPublished - 29 Mar 2021

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