Scalable multiplexed detector system for high-rate telecom-band single-photon detection.
G Brida1, I P Degiovanni, F Piacentini
1Istituto Nazionale di Ricerca Metrologica, 91 Strada delle Cacce, 10135 Torino, Italy.
The Review of Scientific Instruments
|December 2, 2009
Summary
We developed a new photon-counting system for high-rate detection at telecom wavelengths. Our method overcomes detector gate deadtime, significantly improving scalability and performance for quantum communication applications.
Area of Science:
- Quantum optics
- Photon detection
- Telecommunications technology
Background:
- Photon-counting at telecom wavelengths is crucial for quantum technologies.
- High-rate photon detection faces challenges due to detector deadtime.
- Existing multiplexing schemes are limited by detector gate deadtime.
Purpose of the Study:
- To present an actively multiplexed photon-counting system for high-rate detection.
- To address the limitations imposed by detector gate deadtime in gated photon-counting systems.
- To demonstrate improved scalability and performance in photon-counting systems.
Main Methods:
- Development of an actively multiplexed photon-counting detection system.
- Implementation of a novel scheme to mitigate detector gate deadtime.
- Experimental validation using telecom-wavelength photon sources.
Main Results:
- The proposed scheme overcomes the deadtime limitation of gated detectors.
- An order of magnitude improvement in performance with as few as 4 detectors.
- A 5x improvement over single detectors and >2x over unoptimized multiplexed schemes using two detectors.
Conclusions:
- The novel scheme restores full scalability to multiplexed photon-counting systems.
- This advancement is critical for high-rate quantum information processing and secure communication.
- The system offers significant performance gains over existing methods, particularly at high detection rates.
