This paper presents the INRIM e®ort related to the implementation of an optical time domain re°ectometer (OTDR) that exploits backscattered light to test an optical ¯ber operating at single photon level, using two di®erent avalanche photodetectors: a free-running Id220 and a gated Id201. Our tests show that the use of the Id220-based OTDR could be very helpful for QKD application, since it allows testing much longer portions of an optical link. This represents a great advantage for QKD systems, where single components and connections are often embedded in a non-separable optical system.
Measurement facility for the evaluation of the backscattering in fiber: Realization of an OTDR operating at single photon level / PIACENTINI F; A. Meda; P. Traina; K.S. Hong; I.P. Degiovanni; G. Brida; M. Gramegna; I. Ruo Berchera; M. Genovese; M.L. Rastello. - In: INTERNATIONAL JOURNAL OF QUANTUM INFORMATION. - ISSN 0219-7499. - 12:2(2014), pp. 1461014.1461014-1-1461014.1461014-8. [10.1142/S0219749914610140]
Measurement facility for the evaluation of the backscattering in fiber: Realization of an OTDR operating at single photon level
PIACENTINI, FABRIZIO;MEDA, ALICE;TRAINA, PAOLO;DEGIOVANNI, IVO PIETRO;BRIDA, GIORGIO;GRAMEGNA, MARCO;RUO BERCHERA, IVANO;M. Genovese;RASTELLO, MARIA LUISA
2014
Abstract
This paper presents the INRIM e®ort related to the implementation of an optical time domain re°ectometer (OTDR) that exploits backscattered light to test an optical ¯ber operating at single photon level, using two di®erent avalanche photodetectors: a free-running Id220 and a gated Id201. Our tests show that the use of the Id220-based OTDR could be very helpful for QKD application, since it allows testing much longer portions of an optical link. This represents a great advantage for QKD systems, where single components and connections are often embedded in a non-separable optical system.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
