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Optoelectronic delay-time controller for laser pulses.

G R Lin

    Optics Letters
    |December 8, 2007
    PubMed
    Summary
    This summary is machine-generated.

    This study demonstrates a voltage-controlled optoelectronic delay line for precise tuning of optical pulse trains. The device offers a wide tunable range and stable performance, enabling simultaneous phase tracking for advanced applications.

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    Area of Science:

    • Optoelectronics
    • Photonics
    • Laser Physics

    Background:

    • Gain-switched laser diodes produce optical pulse trains crucial for high-speed communications.
    • Precise control over the timing of these pulses is essential for signal processing and system synchronization.
    • Existing delay line technologies may lack the continuous tuning range or stability required for advanced applications.

    Purpose of the Study:

    • To demonstrate a novel dc-voltage-controlled optoelectronic delay line.
    • To achieve continuous tuning of the relative delay time for optical pulse trains.
    • To enable simultaneous phase tracking of laser pulse trains with external signals.

    Main Methods:

    • Utilizing a gain-switched laser diode to generate optical pulses.

    Related Experiment Videos

  • Implementing a dc-voltage-controlled optoelectronic delay line mechanism.
  • Characterizing the tunable range, responsivity, resolution, timing fluctuation, and long-term drift of the delay line.

    • Main Results:

    • A maximum tunable delay time range of 3.9 ns (approximately 2 periods) was achieved for optical pulses at a 500-MHz repetition rate.
    • The device exhibited a tuning responsivity of 0.54 ps/mV and a resolution of <0.2 ps.
    • Measured timing fluctuation was 0.13 ps, with a long-term drift of 20 fs/min, demonstrating high stability.
    • The scheme successfully allowed simultaneous phase tracking of the laser pulse train to unknown signals.

    Conclusions:

    • The demonstrated dc-voltage-controlled optoelectronic delay line provides a robust platform for precise optical pulse timing control.
    • The device's wide tuning range, high resolution, and stability make it suitable for advanced photonic systems.
    • The capability for simultaneous phase tracking opens possibilities for integrated signal processing and device characterization.