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Updated: Nov 21, 2025

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High-precision channel spacing and balanced output multiwavelength laser array with fine tunability.

Yongkang Feng, Yongbing Zhao, Liangliang Yang

    Applied Optics
    |January 15, 2021
    PubMed
    Summary

    A novel multiwavelength laser array (MLA) demonstrates fine wavelength tunability and excellent single-mode performance. This laser array offers a wide tuning range and stable output power, crucial for advanced optical systems.

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    Area of Science:

    • Photonics and Optical Engineering
    • Laser Technology
    • Integrated Optics

    Background:

    • Advanced optical systems require lasers with precise wavelength control.
    • Existing laser technologies face limitations in tunability and spectral purity.

    Purpose of the Study:

    • To experimentally demonstrate a multiwavelength laser array (MLA) with fine wavelength tunability.
    • To evaluate the performance metrics of the MLA, including single-longitudinal-mode operation and side-mode suppression ratio (SMSR).

    Main Methods:

    • Experimental demonstration of a multiwavelength laser array.
    • Characterization of laser performance, including wavelength range, channel spacing, wavelength deviation, output power stability, and SMSR.

    Main Results:

    • The MLA exhibits excellent single-longitudinal-mode performance with SMSR reaching up to 62.1 dB.
    • A wide tunable wavelength range of 25.003 nm was achieved with 63 channels at 50 GHz spacing.
    • All lasers showed a wavelength deviation within ±0.02 nm, and output power remained constant (standard deviation 0.63 dBm).
    • All SMSRs were consistently above 50 dB.

    Conclusions:

    • The demonstrated MLA offers high performance in terms of wavelength tunability, spectral purity, and power stability.
    • This MLA is suitable for applications demanding precise and stable multiwavelength outputs.
    • The results validate the MLA's potential for next-generation optical communication and sensing systems.