Abstract
A single-photon signal at 1.55 μm was converted to the visible region by sum-frequency mixing with a strong pumping beam at 1064 nm in a periodically poled lithium niobate crystal placed in a diode-pumped Nd:YVO4 laser cavity. As the intracavity pump laser could be automatically stabilized without cavity lock, robust long-term stability was demonstrated for single-photon frequency upconversion, with a conversion efficiency of 74.3%. Such a stable single-photon upconversion was demonstrated to be efficient and robust for single-photon counting at 1550 nm, and the corresponding background noise was measured at less than 420✗103s-1.
| Original language | English |
|---|---|
| Pages (from-to) | 793-795 |
| Number of pages | 3 |
| Journal | Optics Letters |
| Volume | 31 |
| Issue number | 6 |
| DOIs | |
| State | Published - 2006 |
| Externally published | Yes |