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10 Gb/s InP-based Mach-Zehnder modulator for operation at 2 μm wavelengths.

M U Sadiq, M R Gleeson, N Ye

    Optics Express
    |May 14, 2015
    PubMed
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    This study presents the first Indium Phosphide (InP) Mach-Zehnder modulator (MZM) utilizing the quantum-confined Stark effect (QCSE) for 2000 nm operation. The device achieves 10 Gb/s data transmission, marking a significant advancement in optical communication technology.

    Area of Science:

    • Optoelectronics
    • Semiconductor devices
    • Optical communications

    Background:

    • Indium Phosphide (InP) is a key material for optoelectronic devices.
    • Mach-Zehnder modulators (MZMs) are crucial for optical signal modulation.
    • Quantum-confined Stark effect (QCSE) offers a mechanism for electro-optic modulation.

    Purpose of the Study:

    • To develop and characterize the first InP-based MZM operating around 2000 nm.
    • To leverage the quantum-confined Stark effect (QCSE) for modulation in this wavelength range.
    • To demonstrate high-speed data transmission using the developed MZM.

    Main Methods:

    • Fabrication of a polarization-sensitive InP-based MZM with 15 compressively strained quantum wells.
    • Characterization of electro-optic (EO) bandwidth, DC extinction ratio, and V(π)L.

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  • Demonstration of back-to-back communication using a 10 Gb/s pseudo-random bit sequence (PRBS).

    • Main Results:

    • The InP-based MZM operates effectively around 2000 nm.
    • Achieved an electro-optic (EO) bandwidth of at least 9 GHz.
    • Demonstrated a DC extinction ratio of ~9 dB and V(π)L of ~9.6 V.mm.
    • Successfully transmitted data at 10 Gb/s using a PRBS.

    Conclusions:

    • The developed InP-based MZM is suitable for optical communication systems around 2000 nm.
    • The device performance metrics (EO bandwidth, extinction ratio, V(π)L) are promising.
    • This work validates the use of QCSE in InP MZMs for high-speed optical data transmission.