A method and system for increasing the capacity and spectral efficiency of optical transmission includes pre-filtering optical pulses utilizing a bandwidth substantially proportional to the bit rate of the transmission system prior to propagating the optical pulses along a transmission fiber and post-filtering the propagated optical pulses utilizing a bandwidth substantially proportional to the bit rate of the transmission system.

 
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> Verification of correct exponentiation or other operations in cryptographic applications

> Electro-optic devices having flattened frequency response with reduced drive voltage

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