TY - GEN
T1 - Variable delay of Gbit/s data using coded Brillouin dynamic gratings
AU - Antman, Yair
AU - Yaron, Lior
AU - Langer, Tomy
AU - Tur, Moshe
AU - Zadok, Avi
PY - 2014
Y1 - 2014
N2 - Dynamic Brillouin gratings (DBGs), inscribed by co-modulating two writing pump waves with a bi-phase code, are analyzed theoretically, simulated numerically, demonstrated and characterized experimentally. A comparison is made between modulation by pseudo-random bit sequences (PRBS) and perfect Golomb codes. Numerical analysis shows that Golomb codes provide lower off-peak reflectivity, due to the unique properties of their cyclic auto-correlation function. Golomb coded DBGs can therefor allow for the long variable delay of one-time probe waveforms with higher signal-tonoise ratios, and without averaging. A figure of merit is proposed, in terms of the optical signal-to-noise ratio of reflected waveforms and the delay-bandwidth product of the setup. As an example, the variable delay of return-to-zero, on-off keyed data at 1 Gbit/s rate, by as much as 10 ns, is successfully demonstrated. The eye diagram of the reflected waveform remains open, whereas PRBS modulation of the pump waves results in a closed eye.
AB - Dynamic Brillouin gratings (DBGs), inscribed by co-modulating two writing pump waves with a bi-phase code, are analyzed theoretically, simulated numerically, demonstrated and characterized experimentally. A comparison is made between modulation by pseudo-random bit sequences (PRBS) and perfect Golomb codes. Numerical analysis shows that Golomb codes provide lower off-peak reflectivity, due to the unique properties of their cyclic auto-correlation function. Golomb coded DBGs can therefor allow for the long variable delay of one-time probe waveforms with higher signal-tonoise ratios, and without averaging. A figure of merit is proposed, in terms of the optical signal-to-noise ratio of reflected waveforms and the delay-bandwidth product of the setup. As an example, the variable delay of return-to-zero, on-off keyed data at 1 Gbit/s rate, by as much as 10 ns, is successfully demonstrated. The eye diagram of the reflected waveform remains open, whereas PRBS modulation of the pump waves results in a closed eye.
KW - Stimulated Brillouin scattering
KW - all-optical variable delay
KW - dynamic gratings
KW - phase codes
KW - slow and fast light
UR - http://www.scopus.com/inward/record.url?scp=84897457920&partnerID=8YFLogxK
U2 - 10.1117/12.2047534
DO - 10.1117/12.2047534
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AN - SCOPUS:84897457920
SN - 9780819499110
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Advances in Slow and Fast Light VII
PB - SPIE
T2 - Advances in Slow and Fast Light VII
Y2 - 2 February 2014 through 5 February 2014
ER -