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Related Experiment Video

Updated: Nov 12, 2025

Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy
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Butterfly-packaged multi-channel interference widely tunable semiconductor laser with improved performance.

Quanan Chen, Kuankuan Wang, Chun Jiang

    Optics Express
    |March 17, 2021
    PubMed
    Summary

    This study details a novel multi-channel interference (MCI) tunable semiconductor laser with enhanced performance. The device offers a wide tuning range and high output power, improving laser technology.

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    Area of Science:

    • Optoelectronics
    • Semiconductor Lasers
    • Photonics

    Background:

    • Widely tunable semiconductor lasers are crucial for optical communications and spectroscopy.
    • Existing designs often face limitations in tuning range, power, and efficiency.
    • Multi-channel interference (MCI) lasers offer a potential solution for broader tunability.

    Purpose of the Study:

    • To describe a novel multi-channel interference (MCI) widely tunable semiconductor laser with improved performance.
    • To analyze the tuning characteristics and operational principles of the MCI laser.
    • To demonstrate a compact, high-performance tunable laser suitable for various applications.

    Main Methods:

    • Fabrication of an MCI semiconductor laser without a common phase section, packaged in a 14-pin butterfly package.
    • Utilizing surface ridge waveguides for gain and phase sections to reduce threshold current.
    • Experimental investigation of tuning characteristics, including output power and side mode suppression ratios (SMSRs).

    Main Results:

    • Achieved a tuning range exceeding 40 nm with SMSRs greater than 48 dB.
    • Obtained approximately 7 dBm fiber power.
    • Demonstrated threshold currents below 18 mA across the tuning range due to optimized waveguide design.
    • Identified operating current maxima when phase sections are in phase with the lasing wavelength.

    Conclusions:

    • The developed MCI laser offers significant improvements in tuning range, power, and efficiency.
    • The device's performance is attributed to its unique architecture and surface ridge waveguide design.
    • Experimental analysis provides new insights into the tuning dynamics of MCI lasers, paving the way for advanced photonic devices.