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Updated: Jun 9, 2026

A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response
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Published on: January 7, 2019

Optical receiver design for high optical return loss.

D M Braun, W V Sorin

    Applied Optics
    |August 25, 2010
    PubMed
    Summary
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    A novel fiber pigtailed optical receiver design with a beveled gradient-index rod lens significantly improved broadband optical return loss (> 65 dB). This advancement minimizes unwanted reflections for enhanced optical system performance.

    Area of Science:

    • Optoelectronics
    • Optical Engineering
    • Photonics

    Background:

    • Optical return loss (ORL) is a critical parameter in fiber optic systems, affecting signal integrity and performance.
    • Traditional optical receiver designs often suffer from limitations due to optical reflections.
    • Minimizing optical reflections is essential for achieving high-performance optical communication systems.

    Purpose of the Study:

    • To introduce and evaluate a new fiber pigtailed optical receiver design.
    • To demonstrate the effectiveness of a beveled gradient-index rod lens in improving optical return loss.
    • To compare the performance of the new design against a conventional receiver.

    Main Methods:

    • Design and fabrication of a fiber pigtailed optical receiver incorporating a gradient-index rod lens with a beveled exit face.

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    Last Updated: Jun 9, 2026

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    Published on: January 7, 2019

    Fabrication of a Low-Cost, Fiber-Coupled, and Air-Spaced Fabry-Pérot Etalon
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  • Characterization of broadband optical return loss using specialized optical testing equipment.
  • Comparative analysis of optical return loss between the novel design and a receiver with an unbeveled lens.

    • Main Results:

    • The new receiver design achieved a broadband optical return loss exceeding 65 dB.
    • The performance was primarily limited by diffuse reflection from the photodetector surface.
    • A conventional receiver with an unbeveled lens exhibited significantly lower optical return loss due to specular reflection.

    Conclusions:

    • A beveled gradient-index rod lens is highly effective in enhancing optical return loss in fiber pigtailed optical receivers.
    • The proposed design offers a substantial improvement over conventional designs, reducing unwanted reflections.
    • This advancement has significant implications for improving the performance and reliability of optical communication systems.