title: Experimental demonstration of localized Brillouin gratings with low off-peak reflectivity established by perfect Golomb codes.
abstract: Dynamic Brillouin gratings (DBGs), inscribed by comodulating two writing pump waves with a perfect Golomb code, are demonstrated and characterized experimentally. Compared with pseudo-random bit sequence (PRBS) modulation of the pump waves, the Golomb code provides lower off-peak reflectivity due to the unique properties of its cyclic autocorrelation function. Golomb-coded DBGs allow the long variable delay of one-time probe waveforms with higher signal-to-noise ratios, and without averaging. As an example, the variable delay of return-to-zero, on-off keyed data at a 1 Gbit/s rate, by as much as 10 ns, is demonstrated successfully. The eye diagram of the reflected waveform remains open, whereas PRBS modulation of the pump waves results in a closed eye. The variable delay of data at 2.5 Gbit/s is reported as well, with a marginally open eye diagram. The experimental results are in good agreement with simulations.
authors: Yair
authors: Y
authors: Antman
authors: Lior
authors: L
authors: Yaron
authors: Tomi
authors: T
authors: Langer
authors: Moshe
authors: M
authors: Tur
authors: Nadav
authors: N
authors: Levanon
authors: Avi
authors: A
authors: Zadok