Coherence multiplexing using a parallel array of electrooptic modulators and multimode semiconductor lasers

Study of LPG-assisted fibre modal Michelson interferometers with coherence addressing and heterodyne interrogation

“…In particular, the light that propagates down the core fibre has contributions from the light that propagated in the core and in the cladding modes at the sensing region, which accumulates a differential optical path delay (much larger than L c ) that is dependent on the measurand action. To detect the phase changes in the fibre Michelson modal interferometer a second interferometer was built to implement coherence reading [6,7]. This is a conventional fibre Michelson interferometer with an open air path in one of its arms, which is adjusted to match the optical path difference of the sensing interferometer.…”

“…After adequate electronic filtering, this signal has the form of an electric carrier (frequency of ~ 90 Hz), with a phase that mirrors the optical phase of the tandem interferometric system. This pseudo-heterodyne processing technique is known to provide sensitive interferometric phase reading [8,9].…”

Staying coherent after kent: From optical communications to biomedical optics

“…The first were Delisle and Cielo publishing in French in 1975 [19], and they were followed by Al Chalabi, Culshaw and Davies [21] in 1983, Brooks et al [22] in 1985, and then Goedgebauer in 1987 [20,23].…”

Optical coherence multiplexing for interprocessor communications

“…(12). Defining SNR as the ratio of signal power to the standard deviation of the equivalent noise power and solving for the product of the bandwidth times the square of the SNR, we get B(SNR)2 = [16N3N4 + 8hv0N3 + 3T(N2 + 3W -…”