Abstract
Temporal multiplexing or demultiplexing of quantum signals would benefit from low-loss, high speed, high rate, and low noise switches. Fiber cross-phase-modulation based switches are a promising solution, but their maximum switching rate is usually limited by pump power limitations. We demonstrate the use of mid-stage pump-pulse re-timing to improve the pump-power efficiency and thus increase the maximum switching rates of such devices. The maximum average pump pulse rate of the switch is shown to increase by more than 50% to 800 MHz when employing pump-pulse retiming. We furthermore confirm the suitability of the switch for quantum signals by sending one of a pair of quantum-correlated photons through the switch while incurring no noticeable degradation of correlations.
| Original language | English (US) |
|---|---|
| Article number | 9291481 |
| Pages (from-to) | 51-54 |
| Number of pages | 4 |
| Journal | IEEE Photonics Technology Letters |
| Volume | 33 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jan 1 2021 |
Funding
Manuscript received November 2, 2020; accepted December 8, 2020. Date of publication December 11, 2020; date of current version December 21, 2020. This work was supported in part by the Defense Advanced Research Projects Agency (DARPA) and in part the Army Contracting Command-Aberdeen Proving Grounds (ACC-APG) under Contract W911NF-18-C-0053. (Corresponding author: Gregory S. Kanter.) The authors are with NuCrypt LLC, Evanston, Il 60201 USA (e-mail: [email protected]).
Keywords
- Single-photon switch
- quantum communications
- quantum information processing
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Electrical and Electronic Engineering