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Related Concept Videos

Atomic Absorption Spectroscopy: Instrumentation01:22

Atomic Absorption Spectroscopy: Instrumentation

An atomic absorption spectrophotometer (AAS) comprises several components: a radiation source, an atomizer, a monochromator, and a detector. The radiation source can be a hollow-cathode lamp (HCL) or an electrodeless-discharge lamp (EDL), both of which provide a narrow emission line of the required wavelength. However, some instruments use continuum sources and high-resolution monochromators to achieve a narrow range of radiation.
The atomizer used in AAS can be either a flame atomizer or an...

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Updated: Jun 20, 2026

A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response
09:03

A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response

Published on: January 7, 2019

Single-mode-fiber saturable absorber.

W V Sorin, R C Youngquist, C C Cutler

    Optics Letters
    |September 2, 2009
    PubMed
    Summary
    This summary is machine-generated.

    Researchers developed a novel single-mode fiber saturable absorber using a dye and evanescent field interaction. This method achieves 50-80% transmission, offering a new approach for optical intensity modulation.

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    A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response
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    In-situ Tapering of Chalcogenide Fiber for Mid-infrared Supercontinuum Generation
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    Published on: May 27, 2013

    Area of Science:

    • Optics and Photonics
    • Materials Science

    Background:

    • Saturable absorption is crucial for optical modulation and pulse shaping.
    • Traditional methods often involve bulk optics or complex setups.
    • Integrating saturable absorbers directly into optical fibers offers advantages in miniaturization and compatibility.

    Purpose of the Study:

    • To demonstrate a novel single-mode fiber saturable absorber.
    • To utilize the evanescent field of guided light for interaction with a saturable dye.
    • To characterize the nonlinear transmission properties of the fiber-based absorber.

    Main Methods:

    • Mechanically removing a portion of the single-mode fiber cladding to expose the evanescent field.
    • Placing a saturable-absorbing dye in close proximity to the fiber core.
    • Characterizing nonlinear transmission by measuring output versus input optical intensity using a Q-switched Nd:YAG laser.

    Main Results:

    • Successfully implemented a single-mode fiber saturable absorber.
    • Demonstrated nonlinear transmission with varying input optical intensity.
    • Achieved transmission rates ranging from 50% to 80% using Eastman 9860 dye.

    Conclusions:

    • The developed single-mode fiber saturable absorber is effective for optical intensity modulation.
    • Evanescent field interaction with saturable dyes provides a viable method for fiber-integrated optical absorption.
    • This technique shows promise for compact and efficient optical control devices.