Hybrid Magneto-Optical Recording is a potential data storage technology in the future informational society. To
construct a research platform for hybrid recording, a dynamic testing system is designed and built in this paper, in which
406.7nm blue laser is used for recording and 655nm red laser for focus servo. With high modularization, the computer
serves as the control core for the laser external modulation, focus servo, and sample plate spinning. Each module and its
function are discussed in detail in the paper. Experimental results are also given to verify the stable and smooth
performance of the system, in which the key obstacle, vibration noise, is successfully surmounted.
Astigmatism method was employed to detect focus error signal in hybrid recording testing system. Frequency
characteristics of piezoelectric nano-positioner were measured, based on which we designed focus servo controller using
available frequency-domain integrated correction method. The requirement for disk vertical deviation is also discussed
according to system expected characteristics. Then we choose air bearing turntable motor to meet the disk deviation
requirement.
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