公开(公告)号：US20150332725A1

公开(公告)日：2015-11-19

申请号：US14278377

申请日：2014-05-15

Applicant: Seagate Technology LLC

Inventor： Tim Rausch ,  Jon D. Trantham ,  John W. Dykes ,  Won Choul YANG

IPC: G11B7/1263

CPC classification number: G11B7/1263 ,  G11B5/012 ,  G11B5/02 ,  G11B7/00736 ,  G11B7/1267 ,  G11B19/046 ,  G11B2005/0021

Abstract: A method of controlling laser output in a heat assisted magnetic recording device can be performed by control circuitry in a data storage device. The method includes measuring a temperature, measuring laser output power of a laser, determining a power error by subtracting an optimal laser output power from the measured laser output power and comparing the power error to at least one threshold to determine whether an applied current to the laser needs to be adjusted. The at least one threshold is related to how great the power error can be while maintaining the integrity of data on a recording medium.

Abstract translation: 控制热辅助磁记录装置中的激光输出的方法可由数据存储装置中的控制电路执行。 该方法包括测量温度，测量激光器的激光输出功率，通过从所测量的激光输出功率减去最佳激光输出功率并将功率误差与至少一个阈值进行比较来确定功率误差，以确定施加到 激光需要调整。 至少一个阈值与维持记录介质上数据完整性的功率误差有多大关系。