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Related Concept Videos

Zener Diodes01:16

Zener Diodes

Zener diodes are specialized semiconductor devices designed to operate in the reverse breakdown region, where they allow current to flow into the cathode, making it positive relative to the anode. This reverse operation distinguishes Zener diodes from conventional diodes and enables their use in various applications, most notably as voltage regulators. One of the defining characteristics of Zener diodes is their nearly vertical I-V (current-voltage) characteristic curve above a certain...

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Visible optical isolator using ZnSe.

J A Wunderlich, L G Deshazer

    Applied Optics
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    PubMed
    Summary
    This summary is machine-generated.

    A new compact optical isolator using zinc selenide demonstrated effective performance at visible wavelengths. This device offers significant isolation, making it suitable for optical applications.

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    Area of Science:

    • Optics and Photonics
    • Materials Science

    Background:

    • Optical isolators are crucial components for preventing back-reflections in laser systems.
    • Developing compact and efficient isolators for visible wavelengths remains an area of interest.

    Purpose of the Study:

    • To construct and evaluate a compact Faraday effect optical isolator for visible light.
    • To characterize the performance of polycrystalline zinc selenide as a nonreciprocal element.

    Main Methods:

    • Fabrication of a compact optical isolator utilizing polycrystalline zinc selenide.
    • Testing the isolator's performance at 5145 Angstroms.
    • Measurement of refractive indices and Verdet constants for zinc selenide across a 4700-6300 Angstrom wavelength range.

    Main Results:

    • The optical isolator achieved 25.5 dB isolation and 2.06 dB insertion loss at 5145 Angstroms.
    • Refractive indices and Verdet constants for zinc selenide were determined within the specified visible spectrum.

    Conclusions:

    • Polycrystalline zinc selenide is a viable material for compact Faraday effect optical isolators in the visible spectrum.
    • The demonstrated performance metrics indicate potential for this isolator in various optical setups.