Title :
Focusing Over Optical Fiber Using Time Reversal
Author :
Piels, Molly ; da Silva, Edson Porto ; Estaran, Jose ; Borkowski, Robert ; Monroy, Idelfonso Tafur ; Zibar, Darko
Author_Institution :
Dept. of Photonics Eng., Tech. Univ. of Denmark, Lyngby, Denmark
Abstract :
A time-reversal array in multimode fiber is proposed for lossless remotely controlled switching using passive optical splitters. The signal to be transmitted is digitally predistorted so that it is routed through the physical layer in order to arrive at only one receiver in an array. The system performance in the presence of an additive white Gaussian noise, modal group delay, and timing error is investigated numerically for single-mode fiber and 10-mode fiber. Focusing using a two-transmitter array and 44 km of single-mode fiber is demonstrated experimentally for 3-GBd QPSK signals with a bit error rate below the forward error correction limit.
Keywords :
AWGN; error statistics; optical arrays; optical beam splitters; optical fibre losses; optical fibre networks; optical focusing; optical receivers; optical switches; optical transmitters; passive optical networks; quadrature phase shift keying; 10-mode fiber; QPSK signals; additive white Gaussian noise; bit error rate; forward error correction limit; lossless remotely controlled switching; modal group delay; multimode fiber; optical fiber; passive optical splitters; physical layer; receiver; single-mode fiber; size 44 km; system performance; time-reversal array; timing error; two-transmitter array focusing; Arrays; Focusing; Optical noise; Optical receivers; Optical transmitters; Signal to noise ratio; Access networks; Digital signal processing; Optical fiber communication; access networks; digital signal processing;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2014.2387092
