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Manner of rewriting the data of three dimensional optical memory device which is produced in glass with ultrashort optical impulse
Manner of rewriting the data of three dimensional optical memory device which is produced in glass with ultrashort optical impulse
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机译:重写在具有超短光脉冲的玻璃中生产的三维光学存储设备的数据的方式
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摘要
To provide a method for rewriting data in a three-dimensional optical memory element created in glass with ultrashort light pulses capable of moving created bits for rewriting. A method for rewriting data in a three-dimensional optical memory element created in glass (18) with ultrashort light pulses comprises the steps of: creating a bit (23) due to a photo-induced contrast in index of refraction inside the glass (18) in three dimensions depending of the strength of a first ultrashort-pulse laser beam; and irradiating the bit (23) created in three dimensions with a second ultrashort-pulse laser beam having a lower energy than the strength of the first ultrashort-pulse laser beam, and when condensing the laser beam with an optical lens (17), condensing the laser beam at a point shifted from the bit (23) to be moved by a predetermined distance in the opposite direction from the direction of propagation of the laser beam, thereby moving the bit (23) for rewriting. IMAGE
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