Experimental demonstration of localized Brillouin gratings with low off-peak reflectivity established by perfect Golomb codes

Yair Antman, Lior Yaron, Tomi Langer, Moshe Tur, Nadav Levanon, Avi Zadok

Research output: Contribution to journalArticlepeer-review

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, on̈Coff keyed data at a 1 GbiẗMs 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 GbiẗMs is reported as well, with a marginally open eye diagram. The experimental results are in good agreement with simulations. . 2013 Optical Society of America.

Original languageEnglish
Pages (from-to)4701-4704
Number of pages4
JournalOptics Letters
Volume38
Issue number22
DOIs
StatePublished - 15 Nov 2013

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