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Updated: May 18, 2026
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Triplet Fusion Upconversion Nanocapsule Synthesis
Published on: September 7, 2022
Dual-channel, single-photon upconversion detector at 1.3 μm.
J S Pelc1, Paulina S Kuo, Oliver Slattery
1E L Ginzton Laboratory, Stanford University, Stanford, California 94305, USA. jpelc@stanford.edu
Optics Express
|October 6, 2012
Summary
Researchers developed a dual-channel upconversion detector for counting 1300-nm photons. This novel system uses sum-frequency generation (SFG) for efficient photon detection and has applications in quantum communications.
Area of Science:
- Quantum optics
- Nonlinear optics
- Photonics
Background:
- Efficient photon detection is crucial for quantum information processing.
- Upconversion detectors offer a pathway to convert infrared photons to detectable visible wavelengths.
Purpose of the Study:
- To demonstrate a two-channel upconversion detector for 1300-nm photons.
- To explore its potential applications in quantum communications.
Main Methods:
- Utilized sum-frequency generation (SFG) in a periodically poled lithium niobate (PPLN) waveguide.
- Employed two pump lasers near 1550 nm to convert 1300-nm photons to two distinct channels near 710 nm.
- Engineered a phase-modulated PPLN waveguide for simultaneous quasi-phasematching of two SFG processes.
Main Results:
- Achieved 31% and 25% full-system photon detection efficiency in the two channels.
- Recorded very low dark count rates (650 and 550 counts per second).
- Reached a peak external conversion efficiency of 70% with volume Bragg grating filtering.
Conclusions:
- The developed dual-channel upconversion detector shows high efficiency and low noise.
- Potential applications include frequency-shifting beamsplitters and time-to-frequency converters for enhanced quantum communication data rates.
