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Updated: Jul 8, 2026

In-situ Tapering of Chalcogenide Fiber for Mid-infrared Supercontinuum Generation

In-situ Tapering of Chalcogenide Fiber for Mid-infrared Supercontinuum Generation

Published on: May 27, 2013

Aperture tapering in a coherent optical correlator.

K G Leib¹, S Hsiao

¹Grumman Aerospace Corporation, Research & Development Center, Bethpage, New York 11714, USA.

|December 1, 1984

Summary

Sharp edges in optical correlators create unwanted effects. Edge tapers effectively reduce these spurious signals, improving matched filter correlator performance.

Area of Science:

Optics and Photonics
Signal Processing

Background:

Optical correlators are susceptible to spurious signals caused by sharp input beam edges.
These edge effects can degrade the performance of matched filter correlators.

Purpose of the Study:

To analyze the impact of sharp edges in optical correlator input beams.
To demonstrate the effectiveness of edge tapers in mitigating these unwanted edge effects.
To reduce spurious signals in matched filter correlators.

Main Methods:

A one-dimensional (1-D) analysis was employed to model the edge effect.
Edge tapers were theoretically investigated to understand their signal-reducing properties.
An aperture approximating an optimal taper was fabricated on film for experimental validation.

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Main Results:

The 1-D analysis confirmed that sharp input edges generate significant spurious signals.
Edge tapers were shown to effectively reduce the intensity of these unwanted edge effects.
The fabricated aperture successfully minimized spurious signals in the matched filter correlator.

Conclusions:

Sharp input edges are a primary source of performance degradation in optical correlators.
Implementing edge tapers is a viable strategy for suppressing spurious signals.
Optimized apertures can significantly enhance the accuracy of matched filter correlators.