Laser diode for DRAW optical disk systems has to have not only high power characteristics (writing) but also low noise characteristics (reading) at low power. However, few of so-called "high power lasers" have low noise. In this paper, we present a new high power low noise laser, which can be volume produced at low cost. The laser have wavelength of 780nm, power output of 25mW (50% duty cycle), and high S/N ratio of 90dB (f=20kHz, BW=300Hz, opt-ical feedback ratio < 1%) at 3mW CW. In addition, it has a lifetime enough to write an optical disk for 50,000 hours.

Date Published: 16 July 1986
PDF: 6 pages
Proc. SPIE 0610, Scientific and Engineering Applications of Commercial Laser Devices, (16 July 1986); doi: 10.1117/12.956402

Published in SPIE Proceedings Vol. 0610:
Scientific and Engineering Applications of Commercial Laser Devices
Rick Feinberg; Lewis Holmes; Morris Levitt, Editor(s)