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1. 发明授权

US06574257B1 Near-field laser and detector apparatus and method 失效
标题翻译：近场激光和检测仪器及方法
公开(公告)号：US06574257B1
公开(公告)日：2003-06-03
申请号：US09495638
申请日：2000-02-01
申请人： Robert L. Thronton , Lambertus Hesselink
发明人： Robert L. Thronton , Lambertus Hesselink
IPC分类号： H01S500
CPC分类号： B82Y10/00 , G11B7/127 , H01S5/0028 , H01S5/0656 , H01S5/06808 , H01S5/0683 , H01S5/18311 , H01S5/18394 , H01S2301/18
摘要： A near-field laser and detector apparatus and method wherein both writing and reading of optical media can be carried out using the same laser operating in a single mode for both read and write operations. The single operational mode can be utilized with both edge emitting and surface emitting laser configurations, and allows readout via rear facet output power variation or by voltage variation across the laser. A small aperture laser is operated during read and write operations at a bias current which is higher than the threshold currents associated with feedback from high and low reflectivity regions of an optical medium. The bias current and laser structure provide a relatively high, continuous output power from the front emission facet of the laser to facilitate writing, while providing substantial fluctuation or change in output power from the rear emission facet to facilitate readout.
摘要翻译：一种近场激光器和检测器装置及方法，其中光学介质的写入和读取都可以使用在单个模式下操作的同一激光器进行读取和写入操作。单个操作模式可以利用边缘发射和表面发射激光器配置，并且允许通过后面输出功率变化或通过激光器的电压变化读出。在读取和写入操作期间，小孔径激光器以高于与光学介质的高和低反射率区域的反馈相关联的阈值电流的偏置电流来操作。偏置电流和激光器结构提供来自激光器的前发射小面的相对高的连续输出功率，以便于写入，同时提供来自后发射面的输出功率的实质波动或变化以便于读出。

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