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Applied Optics

Applied Optics


  • Vol. 29, Iss. 20 — Jul. 10, 1990
  • pp: 3030–3039

Influence of laser read and bias power levels on the performance of thermomagnetooptic recording media

Brian J. Bartholomeusz, David J. Genova, and Douglas G. Stinson  »View Author Affiliations

Applied Optics, Vol. 29, Issue 20, pp. 3030-3039 (1990)

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Read and bias power levels are capable of noticeably altering the response of thermomagnetooptic recording materials. The heating caused by the read power can decrease signal levels due to the temperature dependence of the polar Kerr rotation. Preheating caused by bias power levels also influences media sensitivity and responses during the writing process. Increased bias levels reduce the optimum recording power and increase the severity of mark length variations caused by write power fluctuations. Simple predictive expressions were derived to describe the influence of bias and read power levels during the mark formation and readout processes. The predicted results were in good qualitative and quantitative agreement with experimental observations.

© 1990 Optical Society of America

Original Manuscript: November 9, 1989
Published: July 10, 1990

Brian J. Bartholomeusz, David J. Genova, and Douglas G. Stinson, "Influence of laser read and bias power levels on the performance of thermomagnetooptic recording media," Appl. Opt. 29, 3030-3039 (1990)

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