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Journals and Conferences
We present a technique to correct for atmospheric scintillation noise in free space optical communications. Common mode rejection is used to remove co-channel noise, where each channel is transmitted on separate, but closely spaced, wavelengths.
We report on the free space optical transmission of FM audio/video signals using a 6.3mm diameter InGaAs modulating retro-reflector.
We report on the free space optical transmission of AM composite video signals using a 10 mm diameter InGaAs modulating retro-reflector.
We present a technique to correct for atmospheric scintillation noise in free space optical communications. Co-channel noise is removed by common mode rejection, where each channel is transmitted on separate, but closely spaced, wavelengths.
In this paper, we summarize progress in free space laser propagation research at the U.S. Naval Research Laboratory, specifically in the context of propagating and detecting signals through the atmosphere in a maritime environment. Transmission through the atmosphere over large bodies of water presents different challenges than transmission through the… (More)
We investigated photonic pulse code modulation (PCM) and sigma-delta A/Ds, which utilise optoelectronic comparators. PCM was demonstrated by simulation and experiment. Extending the simulation to a sigma-delta architecture yielded a peak SNR of 50 dB
The use of high repetition rate, low timing jitter SC laser pulse trains there might facilitate the fabrication of integrated optical analog to digital converters operating with high bandwidths at high speed. The error diffusion oversampling architecture has been suggested for use in an analog to digital conversion scheme using self electro optic effect… (More)
An optical implementation of an oversampled analog-todigital converter has been proposed by Shoop and Goodman [ 11, which comprises two subtraction nodes and a combined signal comparator and output quantiser. This paper discusses the limitations on system resolution due to non-idealities in the circuit components. The subtracter's layout is discussed and a… (More)