Seagate Technology Incorporated

Sae Magnetics (hong Kong) Limited

Kai Chiu Cheung

Tim Rausch

Tatsuya Shimizu

Wai Yeun Lai

Wai Yuen Lai

A heater power of a heat-assisted magnetic recording head is set based on an initial head-medium clearance estimate in response to the heater power. For a plurality of iterations, an optimum laser power of the recording head is determined and a heater power is set for a next iteration that results in an optimum heater power for the optimum laser power. If differences in the heater and laser powers between two subsequent iterations are below thresholds, the iterations are stopped and the optimum heater power and the optimum laser power for one of the subsequent iterations are used as an operational heater power and an operational laser power.

Procedure for setting laser and heater power in HAMR device

A heater power of a heat-assisted magnetic recording head is set to an initial power to induce an initial head-medium clearance. For a plurality of iterations, a heater power at an optimum laser power is determined that achieve a target clearance. If differences in the heater power and optimum laser power between the two subsequent iterations are below a threshold, the iterations are stopped and the heater power and the optimum laser power for one of the two subsequent iterations is used as an operational heater power and laser power for the heat-assisted magnetic recording head.

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Tokyo, Japan

Kai Chiu Cheung