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http://dx.doi.org/10.9797/TSISS.2011.7.1.036

Design and evaluation of laser module for light delivery in heat assisted magnetic recording  

Choi, Yong-Bok (연세대학교 정보저장기기연구센터)
Lee, Moon-Ho (연세대학교 기계공학과)
Kim, Young-Joo (연세대학교 기계공학과)
Publication Information
Transactions of the Society of Information Storage Systems / v.7, no.1, 2011 , pp. 36-41 More about this Journal
Abstract
The micro laser module was designed and prepared to deliver the light to the HAMR head. It consists of laser diode, photo diode and actuator to realize stable light delivery even though the head is fluctuated during the disk rotation. The optical evaluation was carried out with the actual distance between the light source and HAMR head with a range of reflectivity and it was found that the incident angle could be controlled within ${\pm}0.125^{\circ}$ to maintain same intensity into the HAMR head. It was also confirmed that the designed micro laser module is thermally stable without any severe effect on the magnetic head.
Keywords
Heat assisted magnetic recording; HAMR; Light delivery; Laser module; Micro actuator;
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