System and method for dual-beam recording and readout of multilayered optical data storage media
AssigneeGeneral Electric Comany
InventorsVictor Petrovich Ostroverkhov, Kenneth Brakeley Welles, Brian Lee Lawrence, Xiaolei Shi, Zhiyuan Ren, Mark Cheverton, Ruediger Kusch
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Abstract
A system and method of operating a dual-beam detection system of a holographic data storage disc, including: impinging a data beam on a data layer of the holographic data storage disc; impinging a tracking beam on a tracking element of the holographic data storage disc; detecting a reflection of the tracking beam from the tracking element; and coordinating position of the data beam relative to the tracking beam.
Claims27
A method of operating a dual-beam detection system for a holographic data storage disc, comprising:
- passing a data beam through a first set of optics to a data layer at a first depth of the holographic data storage disc;
- passing a tracking beam through a second set of optics to a second depth of the holographic data storage disc;
- detecting a reflection of the tracking beam;
- synchronizing positioning of the first set of optics with the second set of optics;
- and
- adjusting a focus of the data beam to maintain the focus of the data beam at the first depth.
A method of operating a dual-beam detection system of a holographic data storage disc, comprising:
- impinging a data beam on a data layer at a first depth of the holographic data storage disc;
- impinging a tracking beam on a tracking element at a second depth of the holographic data storage disc;
- detecting a reflection of the tracking beam from the tracking element;
- and
- coordinating a position of the data beam relative to the tracking beam such that the data beam is focused on the data layer at the first depth.
A dual-beam detection system of a holographic data storage disc, comprising:
- a first optical excitation device configured to provide a data beam at a first wavelength to impinge on data layers of the holographic data storage disc;
- a second optical excitation device configured to provide a tracking beam at a second wavelength to impinge on a servo plane of the holographic data storage disc;
- and
- an optical assembly configured to coordinate a position of the data beam with respect to the tracking beam and configured to coordinate a focus depth of the data beam with respect to the tracking beam.
The system of 22, wherein the actuator mechanism comprises a first actuator for the first lens and a second actuator for the second lens, and wherein a servo control loop synchronizes the first actuator with the second actuator.
Dependencies are inferred from the claim text.