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Related Experiment Video

Updated: May 17, 2026

Fabrication of High Contrast Gratings for the Spectrum Splitting Dispersive Element in a Concentrated Photovoltaic System
12:08

Fabrication of High Contrast Gratings for the Spectrum Splitting Dispersive Element in a Concentrated Photovoltaic System

Published on: July 18, 2015

Phase-engineered distributed grating reliefs for high-power single-mode 795-nm VCSELs with on-axis emission.

Julian Lindner, Stephan Gronenborn, Valerio Torrelli

    Optics Letters
    |May 15, 2026
    PubMed
    Summary

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    Researchers developed novel 795 nm vertical-cavity surface-emitting lasers (VCSELs) achieving record 10.9 mW single-mode output power. This breakthrough enhances laser performance for quantum technology and biomedical applications.

    Area of Science:

    • Optics and Photonics
    • Semiconductor Lasers

    Background:

    • Vertical-cavity surface-emitting lasers (VCSELs) are crucial for various applications.
    • Enhancing single-mode output power while maintaining polarization and beam quality is a key challenge.

    Purpose of the Study:

    • To demonstrate a novel VCSEL design for record-high single-mode output power.
    • To stabilize high-order transverse modes and control beam characteristics.

    Main Methods:

    • Utilized a strongly elongated oxide aperture in 795 nm VCSELs.
    • Integrated distributed grating reliefs (GR) and dielectric phase-shifting pillars (PP) on the output facet.
    • Employed simulations to guide the design and experimental validation.

    Main Results:

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    Writing Bragg Gratings in Multicore Fibers
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    Writing Bragg Gratings in Multicore Fibers

    Published on: April 20, 2016

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    Last Updated: May 17, 2026

    Fabrication of High Contrast Gratings for the Spectrum Splitting Dispersive Element in a Concentrated Photovoltaic System
    12:08

    Fabrication of High Contrast Gratings for the Spectrum Splitting Dispersive Element in a Concentrated Photovoltaic System

    Published on: July 18, 2015

    Writing Bragg Gratings in Multicore Fibers
    08:48

    Writing Bragg Gratings in Multicore Fibers

    Published on: April 20, 2016

  • Achieved record (10.9 ± 0.4) mW single-mode output power with linear polarization.
  • Successfully stabilized high-order transverse modes using GR and PP.
  • Demonstrated on-axis far-field emission through phase alignment of adjacent emission sites.

    • Conclusions:

    • The proposed high-order mode stabilization concept significantly boosts VCSEL single-mode output power.
    • This approach preserves linear polarization and on-axis emission.
    • The technology is highly attractive for quantum technology and biomedical applications.