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描述了多阶母盘刻录系统中一种基于工业标准结构(ISA)总线接口和复杂可编程逻辑器件(CPLD)技术的激光多功率写入控制方法及其控制电路的设计实现。控制电路以工业标准结构总线接口与计算机通信,以复杂可编程逻辑器件为核心处理单元,采用外加功率探测器进行功率反馈,可以同时控制激光器的写入功率和写入时间,使半导体激光器可以对母盘上感光材料进行多阶功率的曝光刻写,同时写入时间可调,从而实现母盘的多阶刻录。已经用于多阶母盘刻录实验系统,可以兼容不同类型的半导体激光器。实验结果表明,使用此控制电路可以在光致变色材料盘片上实现至少8阶功率写入,并获得8阶信号。其最小写入时间125ns,长时间工作输出功率的不稳定性小于1%,可满足只读型多阶光盘的刻录需要。
This paper describes a laser multi-power write control method based on Industry Standard Architecture (ISA) bus interface and complex programmable logic device (CPLD) technology in a multi-level mastering system and the design and realization of its control circuit. The control circuit communicates with the computer through an industry standard bus interface. The complex programmable logic device is used as the core processing unit. The power feedback is made by the addition of a power detector, which can simultaneously control the write power and the write time of the laser, so that the semiconductor laser can Multi-stage exposure of the photosensitive material on the master disk, while writing time adjustable, in order to achieve multi-level master recording. Has been used in multi-stage master recording experiment system, compatible with different types of semiconductor lasers. Experimental results show that this control circuit can realize at least 8th order power write on the photochromic material disk and obtain 8th order signal. The minimum write time of 125ns, long hours of work output power instability of less than 1%, to meet the requirements of read-only multi-step optical disc recording.