Full Content is available to subscribers

Subscribe/Learn More  >
Proceedings Article

Single Mode Diode Laser For Optical Scanning And Recording

[+] Author Affiliations
R. J. Fu, C. J. Hwang, C. S. Wang

General Optronics Corporation (United States)

Proc. SPIE 0610, Scientific and Engineering Applications of Commercial Laser Devices, 138 (July 16, 1986); doi:10.1117/12.956398
Text Size: A A A
From Conference Volume 0610

  • Scientific and Engineering Applications of Commercial Laser Devices
  • Rick Feinberg; Lewis Holmes; Morris Levitt
  • Los Angeles, CA | January 21, 1986

abstract

Laser beam scanning with holographic grating has the advantage of low cost, vibration and wobble insensitive and simple mechanical construction. However, it requires that the laser operate at single longitudinal mode with good wavelength stability. This is easily achieved in a gas laser but is difficult thus far to obtain with a semiconductor laser. We have specifically developed a high power laser particularly suitable for use in holographic scanning. Its high power and single transverse mode feature are also useful in optical disc recording. The device is called channeled-substrate narrow stripe laser with double current confinement and large optical cavity. In this structure, stable single longitudinal mode is achieved by strong index guiding and special facet coating. Furthermore, single transverse mode is maintained by good lateral electrical and optical confinements. The high power capability is obtained by the use of large optical cavity. The resultant is a buried crescent-shaped active region with an additional reverse-biased p-n junction. Light output up to 50 mW is obtained at 790 nm in CW operation at room temperature. Threshold current as low as 30 mA and differential quantum efficiency as high as 60% are achieved. Furthermore, high quality beam with minimum astigmatism and a diver-gence angle of 320 x 100 (FWHM) is maintained throughout the whole power range. This laser has been incorporated into our Holoscan laser printer which is now commercially available. It is also being used in a variety of prototype disc recording systems.

© (1986) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

R. J. Fu ; C. J. Hwang and C. S. Wang
"Single Mode Diode Laser For Optical Scanning And Recording", Proc. SPIE 0610, Scientific and Engineering Applications of Commercial Laser Devices, 138 (July 16, 1986); doi:10.1117/12.956398; http://dx.doi.org/10.1117/12.956398


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.