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Tuneable optoelectronic bandpass filtering using a simple self-pulsating two-section laser.

Sandra Dudley, Jose Guzman, Terence Quinlan

    Optics Express
    |May 23, 2009
    PubMed
    Summary

    This study shows tuneable optoelectronic bandpass filtering for amplitude-shift keying (ASK) modulated data streams using a two-section laser. A 15dB gain enhancement was achieved at specific carrier frequencies.

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    Area of Science:

    • Optoelectronics
    • Laser Physics
    • Signal Processing

    Background:

    • Amplitude-shift keying (ASK) modulation is widely used in optical communication systems.
    • Effective bandpass filtering is crucial for signal clarity and data integrity.
    • Tuneable filtering offers flexibility in managing data streams with varying carrier frequencies.

    Purpose of the Study:

    • To demonstrate tuneable optoelectronic bandpass filtering for ASK modulated subcarrier data streams.
    • To investigate the performance of a two-section laser for this filtering application.
    • To quantify the gain enhancement achieved during the filtering process.

    Main Methods:

    • Utilizing a two-section laser device.
    • Implementing tuneable optoelectronic bandpass filtering.
    • Modulating a subcarrier data stream using ASK.
    • Locking the laser to specific carrier frequencies (697MHz and 1100MHz).

    Main Results:

    • Successful demonstration of tuneable optoelectronic bandpass filtering.
    • Achieved a significant gain enhancement of 15dB.
    • Observed gain enhancement when the laser was locked to 697MHz and 1100MHz carrier frequencies.

    Conclusions:

    • A two-section laser can effectively perform tuneable optoelectronic bandpass filtering for ASK modulated data.
    • The demonstrated technique offers a method for enhancing signal gain during filtering.
    • This approach has potential applications in optical communication and signal processing.