Phase Change Recording with an OSL Head with a 1.3µm Wavelength Laser Diode

Hiroo UKITA  Yasuyuki SUGIYAMA  Yoshitada KATAGIRI  

IEICE TRANSACTIONS (1976-1990)   Vol.E73   No.4   pp.471-473
Publication Date: 1990/04/25
Online ISSN: 
Print ISSN: 0000-0000
Type of Manuscript: Special Section LETTER (Special Issue on 1990 Spring National Convention IEICE)
Category: Optoelectronics and Quantum Electronics

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Phase change recording with an optically switched laser (OSL) head is realised for the first time. This head consists of a 1.3µm wavelength laser diode monolithically integrated with a photodetector (LD-PD) and a flying slider. The lensless OSL head has a minimum power of 18 mW (1 MHz) for writing information on a 1200 rpm, 130 mm diameter, SbTe based alloy disk. The bit shape and crystalized level are uniform and the readout signals are of high quality.