一种新的多阶只读光存储方法的仿真分析和实验验证

提出了一种波形调制的方法,在原有记录符中加入一个短坑或短岸,在读出信号上产生一个可辨识的"扰动",从而对读出信号波形产生调制.用简化的光刻模型和基于角谱分解的读出模型,对该方法在DVD系统上的坑形和读出信号进行了仿真.仿真结果确定了各个游程可实现的阶次和各个阶次的刻写参量.对典型游程6T和11T进行了实验,读出信号与仿真结果相吻合,并分别得到了小于1×104和1×10-5的阶次误码率.实验结果验证了该方案的实际可行性.

Simulation Analysis and Experimental Validation of a New Multi-Level Read-Only Optical Recording Method

A multi-level method using wave-shape modulation is presented. In this method, a short pit or land is added to the original marks, which leads to a recognizable “disturbance” in the readout signal and results in wave-shape modulation of readout signal. Using a simplified mastering model and angular-spectrum decomposition-based readout model, this method is simulated on the DVD system. Simulation determines how many levels can be realized for each run-length as well as the writing parameters for each level. Experiments on typical run-length of 6T and 11T are carried out. The readout signal agrees with the simulated one. Level error rates less than 1×10-4 and 1×10-5 are achieved. Experiments validate this new multi-level recording method.