Request InfoAlliance Fiber Optic Products Inc.Alliance Fiber Optic Products Inc. has launched all-passive filter-based, optical add/drop multiplexers that achieve 50-GHz bandwidths over telecommunications operating conditions without temperature compensation. They offer residual isolation of better than –35 dB, high wavelength accuracy and stability, low insertion loss, high directivity, an epoxy-free optical path and low polarization-dependent loss. 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