NDLI: Investigation of the Dynamic Characteristics of Light Delivery for Thermal Assisted Magnetic Recording

Content Provider	IEEE Xplore Digital Library
Author	Kyoung-Su Park Ki-Hoon Kim Young-Pil Park No-Cheol Park
Copyright Year	1965
Abstract	Several new technologies have recently been proposed for high areal density greater than 5 Tb/in² as next generation storage devices. Among these technologies is thermal assisted magnetic recording (TAMR). However, there are several dynamic and realistic problems associated with the current method of TAMR light delivery that must be resolved. In this paper, we investigate and discuss the dynamic characteristics for two kinds of light delivery systems using experimental and simulated results. We concluded that the optical fiber TAMR light delivery system had higher vertical and pitch stiffness. This could result in higher flying height modulation (FHM) on the disk surface and reduced TD-TO performance. Furthermore, since the optical fiber TAMR light delivery system has a lower positive pitch angle during unloading process, as soon as the air bearing disappears after the limiter is engaged, the contact possibility between the slider and the disk increases in unloading process. In addition, for the mounted laser diode (LD) TAMR light delivery system, we constructed a thermal-structural coupling finite element (FE) model of the entire TAMR system and simulated the thermal distribution and structural expansion according to temperature distribution. The results showed that the thermal problem was caused by heat produced by the LD, which can affect the head disk interface (HDI) problem in high areal density.
Sponsorship	IEEE Magnetics Society
Starting Page	1992
Ending Page	1998
Page Count	7
File Size	1368754
File Format	PDF
ISSN	00189464
Volume Number	47
Issue Number	7
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-07-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Adaptive optics Optical fibers Optical device fabrication Media Loading Load modeling touchdown/take off Head pole tip protrusion laser diode (LD) light delivery load/unload optical fiber thermal assisted magnetic recording (TAMR)
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Light Delivery System for Heat-Assisted Magnetic Recording

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