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Method and system for data recording and reading in multi-photon excitable media

A technology for data recording and media, applied in optical recording systems, data recording, optical recording/reproducing/erasing methods, etc.

Inactive Publication Date: 2008-09-17
MEMPILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Stepwise processes such as the 1+1 recording process described in U.S. Patent No. 6,846,434 can also cause this nonlinearity

Method used

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  • Method and system for data recording and reading in multi-photon excitable media
  • Method and system for data recording and reading in multi-photon excitable media
  • Method and system for data recording and reading in multi-photon excitable media

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Embodiment Construction

[0052] The present invention is used in certain aspects to optimize the process of recording and reading information in 3D nonlinear optical media, especially two-photon media. In some embodiments of the invention, the invention provides for proper recording and reading strategies by appropriately controlling the recording and reading regime, ie process parameters such as power distribution and event duration during recording and reading events. Selection of an appropriate read mode may aim to minimize graying (recording effect during read).

[0053] The nonlinear optical storage medium used in the present invention is characterized by a certain first function W corresponding to the desired recording effect (i.e. providing a desired depth of modulation within the medium or recording area), and is related to the recording area for reading A certain second function S corresponding to the detectable photoresponse of the signal. The first and second functions are such that there ...

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Abstract

A method, system and non-linear optical storage medium are presented for use in at least reading data in the medium. The technique utilizes a first function corresponding to an effect of data recording in the medium and a second function corresponding to an effect of reading the recorded data, where each of the first and second functions is a function of at least a power profile of applied interacting radiation in a respective one of the recording and reading events and a duration of said event. These data is utilized to select a certain operating mode defined by ranges of said power and duration parameters during the reading process corresponding to a non-degenerate relation between the first and second functions.

Description

technical field [0001] The invention generally belongs to the field of recording / reading data in information carriers and relates to recording and reading methods and systems for non-linear three-dimensional optical information carriers. Background technique [0002] Patent Cooperation Treaty publication WO 01 / 73779, assigned to the assignee of the present application, discloses a non-linear three-dimensional information carrier having a monolithic disc-shaped body made of a transparent or translucent polymeric material incorporating active moieties. The active moiety (chromophore) responds to laser irradiation and changes state from one isomeric form to another when interacting with laser energy. The active moiety exhibits multiphoton absorption properties. Information is recorded on such a carrier as a series of regular or elliptical and / or oblique data marks. This technique is disclosed in Patent Cooperation Treaty Publication WO2005 / 015552, assigned to the assignee of ...

Claims

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Application Information

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IPC IPC(8): G11B7/004
CPCB82Y10/00G11B7/00456G11B7/0052G11B7/245G11B2007/0009G11B7/00455G11C13/041G11B7/246G11B7/004G11B7/005
Inventor 奥塔尔·阿尔佩特亚伊尔·萨洛莫安德鲁·N·希普韦
Owner MEMPILE
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