Patent ID: 8787129
Filing Date: 2014-07-22
Classification: G02B,G11B,Y10T

Abstract:
1. A waveguide in a thermally assisted magnetic recording (TAMR) head comprising: (a) a first section with a first width and a first end at a back end of a slider, the first end receives transverse electric (TE) light from an adjoining laser diode (LD), and a second end that is connected to the first end by two parallel sides which are aligned in a first axis direction that is perpendicular to an air bearing surface (ABS); (b) a tapered section having a first width in a cross-track direction at a first end that adjoins the second end of the first section, and a second width in a cross-track direction at a second end that faces the ABS wherein the second width is less than the first width, the tapered section narrows a beam of TE light that is propagated toward the ABS; (c) a first sub-section that has the second width in a cross-track direction between two sides that are aligned in the first axis direction, and a first end adjoining the second end of the tapered section; (d) a second sub-section that has the second width between two sides that are aligned perpendicular to the ABS, and a first end adjoining the ABS, light propagated through the second sub-section is coupled to an adjacent plasmon generator (PG); and (e) a light polarization rotator section for converting TE light from the first sub-section into transverse magnetic (TM) light which enters the second sub-section and is then coupled to the PG, comprising;