We report on the work about photonic quantum sensing, in particular, the demonstration of quantum infrared spectroscopy using a nonlinear quantum interference of photon-pair generation processes with the ultra-broadband region.
Nonlinear quantum interferometers enable us to extract the optical properties of a sample with a detection frequency different from the probe frequency using quantum correlation and quantum interference. In this work, we investigate both theoretically and experimentally the nonlinear quantum interferometer with pulsed laser excitation where a dispersive spectrometer is used for identifying the detection frequency. We show that the visibility of interferometric fringes in the spectral domain is reduced when the interferometric path difference is increased. This result will be useful for the design of pulsed laser-excited nonlinear interferometer for quantum sensing applications.
Visible-infrared photon pair sources working in broadband mid-infrared region are useful for applications such as heralded mid-infrared single photon sources. Here, we demonstrate experimentally a wavelength variable visible-infrared photon pair source in the mid-infrared region over a wide spectral range of 2 to 5 μm. By changing the angle of the nonlinear crystal in the source, the observed wavelengths of the signal photons change from 600 to 965 nm, corresponding to the idler wavelengths in 1186-4694 nm.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.