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We propose and experimentally demonstrate a novel scheme of the Brillouin optical correlation domain analysis (BOCDA) using a single sideband electro-optic modulator (SSBM). In the work, the SSBM is used to get carrier suppressed upper sideband for the pump wave, and also lock-in detection is used by applying chopped microwave to SSBM for chopping the pump wave. This implementation enables us to eliminate an additional intensity modulator (IM) for lock-in detection in conventional BOCDA scheme. In the experiment, a 100-m measurement range with 8-cm spatial resolution is successfully achieved. [ABSTRACT FROM AUTHOR]

We propose and compare two new methods for synthesizing piecewise-uniform long period fiber gratings. The proposed methods, which employ the optimization algorithm based on the lattice filtermodel, are used to design the equalizer which compensates for the nonflat gain characteristics of the erbium-doped fiber amplifiers (EDFA). We have obtained design parameters of piecewise-uniform long period fiber gratings which fit the inverted erbium gain spectrum of a commercially available EDFA over the entire 1525 nm-1570 nm range. We analyze the sensitivity of the two proposed methods with respect to the parameter variations.