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Related Experiment Video

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Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
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4-λ InGaAsP-Si distributed feedback evanescent lasers with varying silicon waveguide width.

Li Tao, Lijun Yuan, Yanping Li

    Optics Express
    |March 26, 2014
    PubMed
    Summary

    Researchers developed a room-temperature, four-wavelength silicon hybrid laser array. This innovation integrates InGaAsP gain with silicon photonics for tunable laser emission, advancing integrated optics.

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    Area of Science:

    • Photonics and Semiconductor Lasers
    • Integrated Optics
    • Materials Science

    Background:

    • Silicon photonics offers a promising platform for integrated optical circuits due to its mature fabrication processes.
    • Developing compact, tunable, and room-temperature lasers on silicon remains a significant challenge for integrated photonic applications.

    Purpose of the Study:

    • To realize a four-wavelength silicon hybrid laser array operating at room temperature.
    • To demonstrate evanescent coupling of InGaAsP multi-quantum wells to silicon waveguides for laser emission.
    • To investigate the performance characteristics of the hybrid laser array.

    Main Methods:

    • Fabrication of a silicon hybrid laser array using selective-area metal bonding technology.
    • Integration of InGaAsP multi-quantum wells with silicon waveguides of varying widths patterned with distributed feedback gratings.
    • Utilizing standard photolithography and holographic lithography for silicon waveguide fabrication (CMOS compatible).

    Main Results:

    • Successfully realized a four-wavelength silicon hybrid laser array operating at room temperature.
    • Lasers exhibit emission peaks between 1539.9 and 1546.1 nm with a wavelength spacing of approximately 2.0 nm.
    • Individual lasers show a typical threshold current of 50 mA and a side-mode suppression ratio of 20 dB.

    Conclusions:

    • The developed silicon hybrid laser array represents a significant advancement in on-chip laser technology.
    • The use of CMOS-compatible fabrication techniques paves the way for scalable integration of tunable lasers.
    • This technology holds potential for various applications in optical communications and sensing.