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Related Concept Videos

Transmission Line Design Considerations01:23

Transmission Line Design Considerations

Aluminum has become the material of choice for overhead transmission lines, surpassing copper due to its abundance and cost-effectiveness. The most prevalent type is the aluminum conductor, steel-reinforced (ACSR), which combines aluminum strands around a steel core. Other variants include all-aluminum conductors (AAC), all-aluminum alloy conductors (AAAC), aluminum conductor alloy-reinforced (ACAR), and aluminum-clad steel conductors. Advanced designs, such as aluminum conductors with steel...

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Fabrication and Testing of Microfluidic Optomechanical Oscillators
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Variable attenuator for use in single-mode fiber transmission systems.

S Masuda

    Applied Optics
    |March 18, 2010
    PubMed
    Summary

    A new compact optical variable attenuator offers a wide dynamic range for fiber optic systems. Its attenuation is adjustable by changing fiber separation, achieving 30 dB dynamic range with low insertion loss.

    Area of Science:

    • Optoelectronics
    • Photonics
    • Fiber optic communications

    Background:

    • Single-mode fiber transmission systems require precise optical signal control.
    • Existing variable attenuators may lack sufficient dynamic range or compactness.

    Purpose of the Study:

    • To develop a novel compact optical variable attenuator.
    • To achieve a wide dynamic range for single-mode fiber systems.

    Main Methods:

    • Designed a V-groove on a concave surface to hold two fiber ends.
    • Adjusted the distance between fiber end faces to control attenuation.
    • Calculated and experimentally verified insertion loss and dynamic range.

    Main Results:

    • Achieved a dynamic range of 30 dB with less than 2.5 mm fiber end separation.

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  • Calculated insertion loss is less than 0.5 dB.
  • Experimental verification confirmed calculated losses, with attenuation reproducibility within 0.5 dB.

    • Conclusions:

    • The developed optical variable attenuator is effective for single-mode fiber transmission.
    • Continuous adjustment of attenuation and wide dynamic range are key features.
    • The device offers high reproducibility and low insertion loss.