| 摘要 |
PROBLEM TO BE SOLVED: To provide a thermally-assisted magnetic recording head that suppresses effects of mode hopping.SOLUTION: In one embodiment, a device includes: a laser unit that is configured to produce laser light and includes a laser resonator having a length in a direction in parallel to laser light emission; and a slider that has a length in a direction perpendicular to a surface facing a medium of a slider. The slider includes: a main magnetic pole that is configured to write data in a magnetic medium; a near-field light generating element that is configured to produce near-field light when the laser light is supplied to the near-field light generating element to assist the main magnetic pole in writing the data in the magnetic medium by heating a local region of the magnetic medium; and a waveguide that is configured to guide the laser light to the near-field light generating element and includes a cladding surrounding a core. An interval of a longitudinal mode of the laser resonator is equal to within a range of about 5% of an integer multiplier of an optical interference period of the waveguide. |
