A signal processing system (10) has a plurality of optical fibers (40, 42, 43) with their one ends (40) mounted in an array board (41) to receive electromagnetic radiation. A coupler (54) interconnects the other ends of the optical fibers (42, 43) in parallel such that electromagnetic radiation is first coupled together and then directed into two or more independent processing channels (45, 47).

 
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> Optical coupled-resonator filters with asymmetric coupling

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