Full Content is available to subscribers

Subscribe/Learn More  >
Proceedings Article

True-blue InGaN laser for pico size projectors

[+] Author Affiliations
U. Strauβ, S. Brüninghoff, M. Schillgalies, N. Gmeinwieser, V. Kümmler, G. Brüderl, S. Lutgen, A. Avramescu, D. Queren, D. Dini, C. Eichler, A. Lell

OSRAM Opto Semiconductors GmbH (Germany)

C. Vierheilig, U. T. Schwarz

Univ. of Regensburg (Germany)

Proc. SPIE 6894, Gallium Nitride Materials and Devices III, 689417 (February 15, 2008); doi:10.1117/12.761720
Text Size: A A A
From Conference Volume 6894

  • Gallium Nitride Materials and Devices III
  • Hadis Morkoç; Cole W. Litton; Jen-Inn Chyi; Yasushi Nanishi; Euijoon Yoon
  • San Jose, CA | January 19, 2008

abstract

Red, green and blue semiconductor lasers are of great interest for full color laser projection. Mobile applications require low power consumption and very small laser devices. InGaN lasers are the best choice for the blue color in applications with output power requirements below 100mW: (1) they have much higher wall plug efficiencies than conventional blue frequency doubled diode pumped solid state lasers and (2) they are more compact than semiconductor IR lasers with subsequent second harmonic generation. We present blue InGaN lasers with high efficiency at a power consumption of several 100mW. Excellent epitaxial quality permits low internal losses. Threshold current densities and slope efficiencies are further optimized by improving the facet coating. The laser threshold current is as low as 25mA and the slope efficiency reaches 1W/A. We present a wall plug efficiency of 15% at output power levels of 60mW.

© (2008) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

U. Strauβ ; S. Brüninghoff ; M. Schillgalies ; C. Vierheilig ; N. Gmeinwieser, et al.
"True-blue InGaN laser for pico size projectors", Proc. SPIE 6894, Gallium Nitride Materials and Devices III, 689417 (February 15, 2008); doi:10.1117/12.761720; http://dx.doi.org/10.1117/12.761720


Access This Proceeding
Sign in or Create a personal account to Buy this proceeding ($15 for members, $18 for non-members).

Figures

Tables

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging & repositioning the boxes below.

Related Book Chapters

Topic Collections

Advertisement
  • Don't have an account?
  • Subscribe to the SPIE Digital Library
  • Create a FREE account to sign up for Digital Library content alerts and gain access to institutional subscriptions remotely.
Access This Proceeding
Sign in or Create a personal account to Buy this proceeding ($15 for members, $18 for non-members).
Access This Proceeding
Sign in or Create a personal account to Buy this article ($15 for members, $18 for non-members).
Access This Chapter

Access to SPIE eBooks is limited to subscribing institutions and is not available as part of a personal subscription. Print or electronic versions of individual SPIE books may be purchased via SPIE.org.