High-density optical data recording

• Main Authors: DONNELLY AUSTIN NICHOLAS, BLACK RICHARD JOHN, WILLIAMS HUGH DAVID PAUL, ANDERSON PATRICK NEIL, DREVINSKAS ROKAS
• Format: Patent
• Language: Chinese; English
• Published: 24.12.2021
• Subjects: INFORMATION STORAGE; INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER; PHYSICS

A method to record data in a solid substrate comprises modulating a polarization angle of a coherent optical pulsetrain, and, while the polarization angle is being modulated, focusing the coherent optical pulsetrain on a locus moving through the solid substrate at a relative velocity. Here the relative velocity, a width of the locus in a direction of the relative velocity, and a rate of modulation of the polarization angle are such that the substrate receives within the width of the locus two or more pulses of the optical pulsetrain differing in polarization angle. In this manner, the two or more pulses record, in different portions of the substrate within the width of the locus, two or more different symbols. 在固体衬底中记录数据的方法包括：调制相干光脉冲串的偏振角，并且在偏振角正在被调制的同时，将相干光脉冲串聚焦在以相对速度移动通过固体衬底的轨迹上。此处，相对速度、相对速度方向中的轨迹宽度和偏振角的调制率使得衬底在轨迹宽度内接收光脉冲串的两个或更多个脉冲，两个或更多个脉冲偏振角不同。以该方式，两个或更多个脉冲在轨迹宽度内的衬底的不同部分中记录两个或更多个不同的符号。