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Updated: May 7, 2026

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
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Tolerant polarization converter for InGaAsP-InP photonic integrated circuits.

Dzmitry O Dzibrou, Jos J G M van der Tol, Meint K Smit

    Optics Letters
    |October 10, 2013
    PubMed
    Summary

    We developed a new polarization converter for InGaAsP-InP photonic integrated circuits. This device achieves 99.8% conversion efficiency and improved fabrication tolerance.

    Area of Science:

    • Photonics
    • Materials Science
    • Electrical Engineering

    Background:

    • Photonic integrated circuits (PICs) are crucial for optical communication.
    • Polarization converters are essential components in PICs for signal manipulation.
    • Existing converters face challenges with fabrication tolerance and efficiency.

    Purpose of the Study:

    • To design and fabricate a novel polarization converter for InGaAsP-InP PICs.
    • To enhance the fabrication tolerance of polarization converters.
    • To achieve high polarization conversion efficiency and low insertion loss.

    Main Methods:

    • Fabrication of a new polarization converter using two right trapezoidal sections.
    • Wet etching techniques for creating angled sidewalls.

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  • Characterization of the converter's performance at 1.535 μm wavelength.

    • Main Results:

    • The novel converter demonstrates significantly improved tolerance to fabrication variations.
    • An average polarization conversion efficiency of 99.8% was achieved.
    • The device exhibits a low insertion loss of approximately 0.7 dB.

    Conclusions:

    • The developed polarization converter offers superior performance for InGaAsP-InP PICs.
    • The design enhances robustness against fabrication imperfections.
    • This advancement is promising for next-generation optical communication systems.