Abstract
Single-photon signals at 1.56 μ were converted into the visible region by sum-frequency generation, with synchronous pump pulses at 1.03 μ in a periodically poled lithium niobate crystal. The signal and pump sources were provided by two synchronized mode-locked fiber lasers at the operation rate of 7.88 MHz. Such a high-speed single-photon upconversion system has shown an overall detection efficiency of 10.4%. The corresponding background noise was measured to be 3.3×103 s-1. The noise-equivalent power in this scheme was 9.93×10-17 W/Hz1/2, which was the lowest compared to the other upconversion systems with similar pump and signal wavelengths.
| Original language | English |
|---|---|
| Article number | 5286845 |
| Pages (from-to) | 1748-1752 |
| Number of pages | 5 |
| Journal | IEEE Journal of Selected Topics in Quantum Electronics |
| Volume | 15 |
| Issue number | 6 |
| DOIs | |
| State | Published - Nov 2009 |
Keywords
- Frequency upconversion
- Nonlinear optics
- Quantum detectors
- Single-photon detection