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Differential-phase-to-intensity conversion based on injection locking of a semiconductor laser.

Y Awaji, T Kuri, W Chujo

    Optics Letters
    |December 1, 2007
    PubMed
    Summary
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    A new optical phase-shift detection method, differential-phase-to-intensity conversion (DPIC), was developed using injection-locked semiconductor lasers. This technique successfully detected high-speed OC-48 phase-modulated signals, showing its practical application.

    Area of Science:

    • Photonics and Optical Communications
    • Semiconductor Laser Technology
    • Signal Processing

    Background:

    • Optical phase-shift detection is crucial for high-speed data transmission.
    • Existing methods face limitations in sensitivity and speed.
    • Semiconductor lasers offer compact and efficient light sources.

    Purpose of the Study:

    • To propose and validate a novel optical phase-shift detection method.
    • To demonstrate the efficacy of differential-phase-to-intensity conversion (DPIC) for signal detection.
    • To confirm the method's capability in detecting high-bit-rate phase-modulated signals.

    Main Methods:

    • Numerical prediction of DPIC using injection-locked semiconductor lasers.
    • Experimental verification of the DPIC principle.

    Related Experiment Videos

  • Demonstration of OC-48 (2.48832-Gbit/s) phase-modulated signal detection.

    • Main Results:

    • DPIC was numerically predicted and experimentally verified.
    • Successful detection of OC-48 phase-modulated signals was achieved using DPIC.
    • The proposed method shows potential for high-speed optical communication systems.

    Conclusions:

    • The novel DPIC method provides an effective means for optical phase-shift detection.
    • Injection locking of semiconductor lasers is a viable approach for implementing DPIC.
    • DPIC is a promising technique for future high-capacity optical communication systems.