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Coherent optical processor for inverse filter generation
(Wiley Periodicals - Microwave and Optical Technology Letters, 2007-01-25)
A new algorithm and system architecture for inverse filter generation using a coherent iterative optical processor is presented. This processor avoids the singularity problem usually faced in inverse filter generation. The ...
Band selection in an amplified spontaneous emission source using the backward-feedback technique
(Wiley, 2005-06)
In this paper, the band-selective behavior in an amplified spontaneous emission (ASE) source of an erbium-doped silica fiber (EDF) is demonstrated. C-band operation is obtained without backward ASE feedback, whereas L-band ...
Nonsplit dual-stage EDFA operating in the C- plus L-band
(Microwave and optical technology letters, 2004-07-30)
The feasibility of a dual-stage erbium-doped fiber amplifier (EDFA) design for operation in both the C-band and the L-band is studied. The design is comprised of nonsplit single-pass amplification at both bands, thus ...
Optical Fourier and Hartley transform adaptive filters
(Microwave and optical technology letters, 2004-01-05)
Optical signal-processing architectures are presented to realize frequency-domain implementations of the classical least-mean-square (LMS) adaptive-filtering algorithm. Optical implementation of both Fourier and Hartley ...
Heterodyne detection for Fiber Bragg Grating sensors
(Elsveier - Optics & Laser Technology, 2000-07)
In this paper, we present a Fiber-Bragg-Grating-based temperature sensor. The technique employs heterodyne detection using two Fiber Bragg Gratings. One of the gratings is used as a reference (local oscillator) and the ...
Dynamic acousto-optic photopolarimeter/ spectrophotopolarimeter
(Society of Photo-Optical Instrumentation Engineers (SPIE) - Optical Engineering, 1999-07)
We propose a novel technique for a new division-of-amplitude
photopolarimeter capable of complete measurement of the state of polarization
of light, as determined by the four Stokes parameters. This
photopolarimeter ...
Spectrophotopolarimeter based on multiple reflections in a coated dielectric slab
(Elsevier - Thin solid films, 1998-02)
A division-of-amplitude photopolarimeter is described that uses multiple reflections inside a coated dielectric slab at
oblique incidence. The first four parallel reflected beams pass through suitably oriented, but fixed, ...
Fractional correlations based on the modified fractional order Fourier transform
(Society of Photo-Optical Instrumentation Engineers (SPIE) - Optical Engineering, 1998-01)
Based on the modified fractional order Fourier transform
(MFROFT), we introduce a modified fractional correlation operation
(MFCO). We propose two systems to implement the MFCO experimentally.
These are analyzed ...
Image deconvolution using a micro genetic algorithm
(Elsevier - Optics Communications, 1997-07-15)
Image deconvolution is addressed using a modified Genetic Algorithm for the error minimization. Numerical examples
are presented to demonstrate the algorithm’s robustness. Specifically, noise levels and various regions ...
Thin-film approximate modeling of in-core fiber gratings
(SPIE - Optical engineering, 1996-10)
Generally tilted in-core fiber gratings are modeled by an equivalent inhomogeneous optical thin film. Its reflectance spectrum is evaluated using the multilayer and optical-path approximations. The results are shown to be ...