A screen for use in distributing a fluid in a process flow system. The seriesparallel converter creates subcarrier modulated signals from the remaining data and modulated signals. The computer determines an avatar for use in place of a video of the attendee in the video conference. The plurality of inputs read various sensors. Neighboring pairs of heating elements of the DBR heating elements positioned over the waveguide in the DBR section are spaced along the direction of the axis of optical propagation by a distance that is equal to or greater than the laser chip thickness b to minimize the impact of thermal crosstalk between distinct temperature regions of the interleaved temperature profile.