Fiber optic delay line filter

摘要: A fiber optic delay line filter receives light energy input signals repretative of any form temporally varying such as electrical or acoustical, for example. plurality paths each having a determinably variant optical propagation delay, and transmits the signals. photo responsive means delayed output transmitted by produces single signal function sum signals, thus performing filtering correlation function. In preferred embodiment, an injection laser emitting diode may be employed converting to commensurate path, partially reflective surface at end, gives effect multiple transmissions along length path which are then detected device, providing narrowband number transmissions.