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n. Plural form of coupler.

"The elements in such "photonic chip" are interconnected through waveguides, and also the integrated optics components themselves are fabricated using waveguide configuration, such as couplers, switches, modulators, multiplexors, amplifiers and lasers, etc."

coupler    beamwidth    frangibility    pickups    tunneling    viewfinder    transducers    heatshield