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Integrated optoelectronic oscillator.

Jian Tang, Tengfei Hao, Wei Li

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    |May 3, 2018
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    This study introduces an integrated optoelectronic oscillator (IOEO) on a single chip for advanced communication systems. The compact IOEO demonstrates tunable microwave signal generation with excellent phase noise performance.

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    Area of Science:

    • Photonics
    • Microwave Engineering
    • Integrated Circuits

    Background:

    • Modern communication systems require high-performance microwave signals, driving demand for compact, efficient, and tunable generators.
    • Integrated Microwave Photonics (IMWP) offers a promising solution by combining optical and electronic components on a single chip.

    Purpose of the Study:

    • To propose and experimentally demonstrate a novel Integrated Optoelectronic Oscillator (IOEO).
    • To achieve on-chip integration of all necessary components for optoelectronic oscillation.
    • To evaluate the performance characteristics, including output frequency and phase noise.

    Main Methods:

    • Monolithic integration of optoelectronic devices onto a compact chip (5x6 cm²).
    • Experimental setup to establish an optoelectronic oscillation loop.
    • Tuning of injection current to control output frequency and assess phase noise.

    Main Results:

    • Successful demonstration of a monolithically integrated IOEO.
    • Achieved output frequencies of 7.30 GHz (at 44 mA injection current) and 8.87 GHz (at 65 mA injection current).
    • Phase noise values of -91 dBc/Hz@1MHz and -92 dBc/Hz@1MHz were recorded at the respective frequencies, with a tunable range of 20 MHz.

    Conclusions:

    • The proposed IOEO meets the demand for compact, tunable microwave signal generation.
    • The integrated approach offers significant advantages in terms of size and performance.
    • Further methods for enhancing IOEO performance are discussed.