Study of an ultrafast analog-to-digital conversion scheme based on diffractive optics.
A potentially ultrafast optical analog-to-digital (A/D) converter scheme is proposed and was partly studied experimentally. In the A/D converter scheme the input signal controls the wavelength of a diode laser, whose output beam is incident on a grating. The beam from the grating hits a diffractive optical element in an array. The wavelength determines which element is illuminated. Each element fans out a unique spot-pattern bit code to be read out in parallel by individual detectors. In the experiment all patterns but one from 64 array elements were read out correctly.
Johansson
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M
Department of Microelectronics ED!, Photonics Laboratory, Chalmers University of Technology, S-412 96 Gothenburg, Sweden.
Löfving
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Hård
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Thylén
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Mokhtari
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Westergren
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Pala
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