Title :
Transmission of Y-00 quantum cipher from transmitter using directly modulated DFB laser for secure access networks
Author :
Futami, Fumio ; Hirota, Osamu
Author_Institution :
Quantum ICT Res. Inst., Tamagawa Univ., Tokyo, Japan
Abstract :
For purpose of realizing a compact transmitter of Y-00 quantum cipher, instead of an external modulator, a directly-modulated DFB laser is employed as EO converter. A 2.5-Gb/s Y-00 transmitter generating 4096-level intensity modulation signals is successfully applied to a transmission experiment, and error free (BER <; 10-9) transmission over 80 km is demonstrated. The transmission distance is limited by the loss of transmission fibers.
Keywords :
cryptography; distributed feedback lasers; electro-optical modulation; error statistics; intensity modulation; optical transmitters; BER; EO converter; Y-00 quantum cipher; Y-00 transmitter; bit rate 2.5 Gbit/s; compact transmitter; directly-modulated DFB laser; external modulator; intensity modulation; secure access networks; transmission fibers; Cryptography; Lasers; Optical attenuators; Optical computing; Optical films; Optical modulation; Stimulated emission; Layer-1 security; Y-00 quantum cipher; direct modulation; fiber transmission;
Conference_Titel :
Photonics in Switching (PS), 2012 International Conference on
Conference_Location :
Ajaccio
