Abstract
Faint laser pulses are practical signal sources in quantum key distribution. The photon statistics has been measured by recording every photo-counts moment and leading directly to the Mandel parameter of the photon distribution. Two different types operation of a single mode laser diode have been considered: either direct pulsing of the driving current or CW emission followed by pulse-shaping using an acousto-optic modulator. In both cases, it has been found that for practical attenuations, the photon distribution in each light pulse follows a poissonian statistics.
| Original language | English |
|---|---|
| Pages (from-to) | 463-468 |
| Number of pages | 6 |
| Journal | Proceedings of SPIE - The International Society for Optical Engineering |
| Volume | 4986 |
| DOIs | |
| Publication status | Published - 27 Nov 2003 |
| Externally published | Yes |
| Event | PROCEEDINGS OF SPIE SPIE - The International Society for Optical Engineering: Physics and Simulation of Optoelectronic Devices XI - San Jose, CA, United States Duration: 27 Jan 2003 → 31 Jan 2003 |
Keywords
- Coherent state
- Diode laser
- Faint laser pulses
- Poissonian statistics
- Quantum cryptography