The Review of Laser Engineering
Online ISSN : 1349-6603
Print ISSN : 0387-0200
ISSN-L : 0387-0200
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Volume 49, Issue 8
Special Issue on Forefront of Laser Devices for Next Generation Lighting
Displaying 1-6 of 6 articles from this issue
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Special Issue on Forefront of Laser Devices for Next Generation Lighting
Special Issue
Laser Review
  • Preface to Special Issue on Forefront of Laser Devices for Next Generation Lighting
    [in Japanese]
    2021 Volume 49 Issue 8 Pages 444-
    Published: 2021
    Released on J-STAGE: April 11, 2024
    DOIhttps://doi.org/10.2184/lsj.49.8_444
    JOURNAL FREE ACCESS
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    Various laser lightings have been developed. This special issue covers not only red, blue and green laser diodes, but also vertical cavity surface emitting lasers and optical systems. In this paper, we describe on an overview of laser devices for next generation lighting.
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  • Current Status and Prospects of Laser Lighting
    [in Japanese]
    2021 Volume 49 Issue 8 Pages 446-
    Published: 2021
    Released on J-STAGE: April 11, 2024
    DOIhttps://doi.org/10.2184/lsj.49.8_446
    JOURNAL FREE ACCESS
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    Recently, visible laser diodes have been rapidly improving their performance as the laser lighting and display market has grown. Laser displays are very attractive, because of their low electric power consumption and their wide color gamut. The small etendue of laser sources is a great advantage for downsizing the laser systems. Lighting applications using lasers are also recognized as being attractive, and are being affected by the evolving laser display technologies. In this article, the latest laser lighting technology, applications, and prospects using visible laser diodes are introduced.
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  • Technology Trends of High-Power Red Laser Diode
    [in Japanese], [in Japanese]
    2021 Volume 49 Issue 8 Pages 451-
    Published: 2021
    Released on J-STAGE: April 11, 2024
    DOIhttps://doi.org/10.2184/lsj.49.8_451
    JOURNAL FREE ACCESS
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    We reviewed the current status and future prospects of red broad area laser diodes (BA-LDs) and emphasized their output power and wall plug efficiency (WPE). As a countermeasure to catastrophic optical damage (COD)，which limits lifetimes, 4.0 W CW operation is expected under a condition where the lifetime exceeds 20000 hours. A WPE of 40% was also achieved. The optical gain of the 660-nm-band LD, which is suitable for artificial plant cultivation, was close to that of the 638-nm LD. Therefore, the output power and the efficiency of 660-nm-band LDs are also expected to improve in the future as 638- nm LDs.
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  • Latest Status of High-Power GaN-Based Blue and Green Laser Diodes
    [in Japanese], [in Japanese], [in Japanese], [in Japanese]
    2021 Volume 49 Issue 8 Pages 456-
    Published: 2021
    Released on J-STAGE: April 11, 2024
    DOIhttps://doi.org/10.2184/lsj.49.8_456
    JOURNAL FREE ACCESS
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    GaN-based blue and green laser diodes (LDs) have already been widely adopted in light sources for laser display systems. The authors explain the status of the development for blue and green LDs and discloses new high-power blue and green LDs based on a c-plane GaN substrate which Nichia has recently fabricated. The optical output power and wall-plug efficiency of blue LDs with an operating current of 3.0 A was 5.67 W and 48.1%，respectively. Additionally, this paper introduces some LD packages that incorporate the recently developed blue/green LDs and those packages are used for the light sources of laser projectors, digital cinema, laser head lights, etc.
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  • Laser Retinal Scanning Display Technology
    [in Japanese], [in Japanese], [in Japanese], [in Japanese]
    2021 Volume 49 Issue 8 Pages 461-
    Published: 2021
    Released on J-STAGE: April 11, 2024
    DOIhttps://doi.org/10.2184/lsj.49.8_461
    JOURNAL FREE ACCESS
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    Retinal scanning image projection technology has unique characteristics that provide a clear image regardless of the viewer’s visual acuity or focus position. This paper describes its optics configuration and design principles for high resolution and focus-free characteristics and concentrates on semiconductor laser specification of image projection performance
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  • The Latest Progress of Vertical-Cavity Surface-Emitting Lasers for Illumination
    [in Japanese], [in Japanese], [in Japanese]
    2021 Volume 49 Issue 8 Pages 467-
    Published: 2021
    Released on J-STAGE: April 11, 2024
    DOIhttps://doi.org/10.2184/lsj.49.8_467
    JOURNAL FREE ACCESS
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    This paper reviews the latest progress of Gallium-nitride (GaN)-based Vertical-Cavity Surface-Emitting Lasers (VCSELs), briefly showing the typical structures previously reported and the characteristics such as efficiency, wavelength, emission angles, modes and applications.
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