Optical Coherence Multiplexing For Interprocessor Communications

Optical Fiber Code Division Multiple Access Networks: A Review

“…The number of active users is still severely limited by the interferometric noise [135,136]. Additionally coding can provide higher security to the system since a potential intruder will need to have knowledge of both the coherence characteristics of the particular channel and the pattern of the code used for encoding.…”

Balanced Optical Phase Diversity Receivers for Coherence Multiplexing

“…The path imbalance of the MZI is chosen to be much larger than this coherence time , such that the two mutually shifted light waves do not interfere coherently. Hence, only the intensity modulation (and not the phase modulation ) results in a visible intensity modulation in : the expected (ensemble average) transmitted power at time is (7) which is independent of . The receiver consists of another two-arm MZI (having path imbalance ), a balanced photodiode pair and a transimpedance amplifier (TIA) having impulse response .…”

Optical noise induced by Gaussian sources in Stokes parameter measurements

“…Coherence multiplexing has been studied over the past two decades as an architecture for asynchronous multiplexing of a large number of users in optical communications networks. 7,9,33,34 In a typical scheme, each transmitter consists of a low-coherence source such as a superluminescent light-emitting diode or an erbiumdoped fiber amplifier, and a MZI. To reduce cross talk and interferometric noise, the differential delays of the MZIs, ͕ n , n ϭ 1...N͖, must be judiciously chosen with respect to the coherence time of the sources c .…”

“…To reduce cross talk and interferometric noise, the differential delays of the MZIs, ͕ n , n ϭ 1...N͖, must be judiciously chosen with respect to the coherence time of the sources c . 7,16 All sums and differences of any two delays, and the delays themselves, should be spaced by several c . Data are transmitted either by amplitude modulation 33 or through modulation of the differential phase of the MZI.…”

“…Another group of applications is low-coherence multiplexing of sensors 5,6 and communication channels in fiberoptic networks. [7][8][9] These applications allow a number of users to simultaneously share a wavelength band and were considered as possible alternatives to wavelengthdivision multiplexing in local area networks. The crosstalk performance of low-coherence multiplexing networks improves as the source bandwidth increases.…”