Title :
Free-space continuous-variable Quantum Cryptography
Author :
Tokunaga, Seiki ; Shirasaki, Keisuke ; Hirano, Takuya
Author_Institution :
Gakushuin Univ., Tokyo
Abstract :
Free-space quantum key distribution (QKD) is expected to realized a global system for QKD based on a network of ground to satellite or satellite to satellite, and thus to extend the distance limit and the utility of QKD method (Schmitt-Manderbach et al., 2007). We report an experimental demonstration of free-space continuous-variable QKD (CV-QKD). We use a 1.55 m-wavelength pulsed diode laser and a pulsed homodyne detector. We have demonstrated free-space CV-QKD using a novel collinear interferometer. Our result shows the feasibility of practical free-space CV-QKD. We believe it will be an important step for the future study of free-space CV-QKD.
Keywords :
homodyne detection; interferometers; quantum cryptography; semiconductor lasers; collinear interferometer; free-space continuous-variable quantum cryptography; free-space quantum key distribution; pulsed diode laser; pulsed homodyne detector; wavelength 1.55 m; Birefringence; Cryptography; Diode lasers; Electrons; Optical interferometry; Optical pulses; Photonic crystals; Pulse measurements; Rayleigh scattering; Satellites;
Conference_Titel :
Lasers and Electro-Optics, 2007 and the International Quantum Electronics Conference. CLEOE-IQEC 2007. European Conference on
Conference_Location :
Munich
Print_ISBN :
978-1-4244-0931-0
Electronic_ISBN :
978-1-4244-0931-0
DOI :
10.1109/CLEOE-IQEC.2007.4386790
