Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Dual-channel, single-photon upconversion detector at 1.3 μm



Jason S. Pelc, Paulina Kuo, Oliver T. Slattery, Lijun Ma, Xiao Tang, Martin M. Fejer


We demonstrate efficient, single-photon upconversion detection of two wavelengths in the 1300-nm band. The upconversion detector is based on a phase-modulated, periodically poled LiNbO3 waveguide that simultaneously quasi-phasematches two sum-frequency-generation processes. The two channels exhibited 31% and 25% photon detection efficiency, as well as very low dark count rates (650 s-1 and 550 s-1, respectively). We investigate applications of the multi-channel upconversion detector as a beamsplitter and demultiplexer to increase the count rates before detector saturation, and to improve temporal resolution using multiplexing.
Optics Express


Quantum detectors, nonlinear optics, parametric processes, beam splitters


Pelc, J. , Kuo, P. , Slattery, O. , Ma, L. , Tang, X. and Fejer, M. (2012), Dual-channel, single-photon upconversion detector at 1.3 μm, Optics Express, [online],, (Accessed April 16, 2024)
Created August 2, 2012, Updated October 12, 2021