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US 10,061,088 B1Granted
Optical spatial mode filter for removing fundamental mode components in a HAMR light path
AssigneeSeagate Technology LLC
InventorChubing Peng
Life of this patent
Estimating the term…
Abstract
A first waveguide portion receives light from an energy source in a fundamental transverse electric (TE00) mode. A mode converter converts a portion of the light to higher-order transverse electric (TE10) mode. A second waveguide portion receives the light at the TE10 mode and delivers the light to a near-field transducer that heats a recording medium in response thereto. An optical spatial mode filter prevents remnant light in the TE00 mode from affecting the recording medium while passing the light at the TE10 mode.
Claims20
An apparatus, comprising:
- a first waveguide portion configured to receive light from an energy source in a fundamental transverse electric (TE00) mode;
- a spatial mode converter coupled to the first waveguide portion and configured to convert the light to a higher-order transverse electric (TE10) mode;
- a second waveguide portion configured to receive the light at the TE10 mode and deliver the light to a near-field transducer that heats a recording medium in response thereto;
- and
- an optical spatial mode filter that prevents the remnant TE00 mode from affecting the recording performance while passing the light at the TE10 mode.
2 more elements
An apparatus, comprising:
- a first waveguide portion configured to receive light from an energy source in a fundamental transverse electric mode (TE00);
- a polarization rotator coupled to the first waveguide portion and configured to convert a portion of the light to transverse magnetic mode (TM);
- a second waveguide portion configured to receive the light at the TM mode and deliver the light to a near-field transducer that heats a recording medium in response thereto;
- and
- an array of dipole antennas in the second waveguide portion that prevents the remnant TE00 mode from affecting the recording medium while passing the light at the TM mode.
2 more elements
A method comprising:
- receiving light at a first waveguide portion from an energy source in a fundamental transverse electric (TE00) mode;
- converting the light to higher-order transverse electric (TE10) mode;
- receiving the light at the TE10 mode at a second waveguide portion and deliver the light to a near-field transducer that heats a recording medium in response thereto;
- and
- optically filtering light in the TE00 mode from the waveguide while passing the light at the TE10 mode.
2 more elements
Dependencies are inferred from the claim text.