光无源器件分析仪（OCA）：OCA使用圣德科（Santec）十分成熟的激光技术，并做了改进、增加了许多功能，它包括一个外腔型可调谐/扫描半导体激光器模块，光接收模块，电路控制模块和一台个人电脑（图1）。OCA中的外腔型激光器既可以工作在波长调谐模式，也可工作在波长扫描模式 Optical Passive Components Analyzer (OCA): OCA uses Santec’s proven laser technology and has been enhanced to include many additional features including an external cavity tunable / scan semiconductor laser module, optical receive Module, circuit control module and a personal computer (Figure 1). The external cavity laser in the OCA can work in either wavelength tuning mode or wavelength scanning mode