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Related Concept Videos

Combinatorial Gene Control02:33

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Combinatorial gene control is the synergistic action of several transcriptional factors to regulate the expression of a single gene. The absence of one or more of these factors may lead to a significant difference in the level of gene expression or repression.
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Hierarchic and combinatorial star couplers.

M E Marhic

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

    A new method allows the creation of large optical stars from smaller ones without signal interference. This technique is ideal for single-mode fiber optics, enabling scalable star coupler fabrication with minimal signal loss.

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    Area of Science:

    • Optics and Photonics
    • Fiber Optic Technology

    Background:

    • Optical star couplers are essential components in fiber optic networks.
    • Current methods for fabricating large star couplers can be complex and introduce signal loss.
    • Single-mode optical systems require specialized coupler designs to avoid interference.

    Purpose of the Study:

    • To present a novel interconnection method for fabricating arbitrarily large transmissive star couplers.
    • To enable the synthesis of large star couplers suitable for single-mode optical applications.
    • To minimize signal loss and multiple-path interference in synthesized star couplers.

    Main Methods:

    • A synthesis approach for constructing large transmissive stars from elementary units.
    • Implementation utilizing high-quality 3-dB fiber optic couplers.
    • Method designed to be free from multiple-path interference.

    Main Results:

    • The proposed method allows for the fabrication of scalable, large optical star couplers.
    • The synthesis process inherently avoids multiple-path interference, crucial for single-mode applications.
    • Utilizing advanced 3-dB couplers results in negligible excess loss.

    Conclusions:

    • The presented interconnection method offers a scalable solution for large transmissive star coupler fabrication.
    • This technique is particularly advantageous for single-mode optical systems due to its interference-free nature.
    • The use of high-quality components ensures efficient and low-loss star coupler synthesis.