Paper
9 March 1999 Sampling technique for achieving full unit-circle coverage using a real-axis spatial light modulator
Steven A. Serati, Kipp Andon Bauchert
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Abstract
We investigate the possibility of using a real-axis spatial light modulator (SLM) to realize complex-amplitude modulation with full coverage over the unit circle. The real-axis SLM produces a pixelated bipolar-amplitude wavefront. Each pixel is basically a spatial pulse width with the signal information being carried by the pulse's amplitude. Data streams generated in this manner have real and imaginary components due to the relative even and odd symmetry of the pulse amplitude modulation. When the pulse rate is twice the minimum Nyquist rate for band-limited amplitude modulation, it is possible to resolve the signal into its quadrature phase components (real and imaginary terms). By changing the relative amplitude of these quadrature phase terms, any value within the complex plane is accessible. Since the SLM does not have any optical gain, coverage is limited to the unit circle in the complex plane.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Steven A. Serati and Kipp Andon Bauchert "Sampling technique for achieving full unit-circle coverage using a real-axis spatial light modulator", Proc. SPIE 3715, Optical Pattern Recognition X, (9 March 1999); https://doi.org/10.1117/12.341291
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Cited by 14 scholarly publications.
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KEYWORDS
Modulators

Spatial light modulators

Modulation

Phase shift keying

Image filtering

Optical filters

Phase shifts

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