Single Mode Diode Laser For Optical Scanning And Recording

R. J. Fu; C. J. Hwang; C. S. Wang

doi:10.1117/12.956398

16 July 1986 Single Mode Diode Laser For Optical Scanning And Recording

R. J. Fu, C. J. Hwang, C. S. Wang

Proceedings Volume 0610, Scientific and Engineering Applications of Commercial Laser Devices; (1986) https://doi.org/10.1117/12.956398
Event: O-E/LASE'86 Symposium, 1986, Los Angeles, CA, United States

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.

Citation Download 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, (16 July 1986); https://doi.org/10.1117/12.956398

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
3 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Optical resonators

Quantum efficiency

Semiconductor lasers

Continuous wave operation

Laser applications

High power lasers

Heterojunctions

Show All Keywords

Keywords/Phrases

Search In:

Publication Years