LASER OPTICAL POWER MONITORING USING THERMAL SENSOR OF A HEAD TRANSDUCER

LASER OPTICAL POWER MONITORING USING THERMAL SENSOR OF A HEAD TRANSDUCER

A light source is configured to produce light, a waveguide is optically coupled to the light source and configured to direct the light to an intended focus location, and a slider is configured to use the light as an energy source for heating a region of a magnetic recording medium. A thermal sensor...

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Hauptverfasser: JOHNSON MICHAEL THOMAS, ANAYA-DUFRESNE MANUEL CHARLES, JANDRIC ZORAN
Format: Patent
Sprache:eng
Schlagworte:
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
PHYSICS
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creator JOHNSON MICHAEL THOMAS
ANAYA-DUFRESNE MANUEL CHARLES
JANDRIC ZORAN
description A light source is configured to produce light, a waveguide is optically coupled to the light source and configured to direct the light to an intended focus location, and a slider is configured to use the light as an energy source for heating a region of a magnetic recording medium. A thermal sensor is situated on the slider at a location outside of a light path that includes the intended focus location. The thermal sensor is configured for sensing a short time constant change in temperature resulting from light source heating of the thermal sensor, wherein the sensed change in thermal sensor temperature is representative of optical intensity of the light delivered to the intended focus location.
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subjects INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
PHYSICS
title LASER OPTICAL POWER MONITORING USING THERMAL SENSOR OF A HEAD TRANSDUCER
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