Disk drive comprising laser transmission line optimized for heat assisted magnetic recording
First Claim
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1. A disk drive comprising:
- a disk;
a head comprising a laser configured to heat the disk while writing to the disk;
at least one transmission line coupling a laser driver to the laser; and
control circuitry configured to write data to the disk by pulsing the laser driver, wherein the transmission line comprises an impedance that results in a target pulse shape of optical power output by the laser,wherein the impedance of the transmission line is less than forty ohms and at least ten percent greater than an impedance of the laser.
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Abstract
A disk drive is disclosed comprising a disk and a head comprising a laser configured to heat the disk while writing to the disk. At least one transmission line couples a laser driver to the laser. Data is written to the disk by pulsing the laser driver, wherein the transmission line comprises an impedance that results in a target pulse shape of optical power output by the laser.
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Citations
24 Claims
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1. A disk drive comprising:
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a disk; a head comprising a laser configured to heat the disk while writing to the disk; at least one transmission line coupling a laser driver to the laser; and control circuitry configured to write data to the disk by pulsing the laser driver, wherein the transmission line comprises an impedance that results in a target pulse shape of optical power output by the laser, wherein the impedance of the transmission line is less than forty ohms and at least ten percent greater than an impedance of the laser. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of operating a disk drive, the method comprising:
writing data to a disk by pulsing a laser driver coupled to a laser through a transmission line, wherein; the laser is configured to heat the disk while writing the data to the disk; and the transmission line comprises an impedance that results in a target pulse shape of optical power output by the laser, wherein the impedance of the transmission line is less than forty ohms and at least ten percent greater than an impedance of the laser. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
Specification