哪儿有卖homodyne detector？

sunhorse

老在论文上看到“homodyne detector”，这东东是要自己做还是哪儿有卖？

ruinan

homodyne detector  
零差检波器(0)零拍检波器(0)零拍检测器(1)

ruinan

零拍检测器
     In order to detect their interference fringes, holodyne detection scheme is used and the probability distribution for the output of homodyne detector is calculated when the intial states being linear and circular polarization coherent light.  
     为检测它们所产生的干涉条纹,本文采用零拍检测方案,计算了初态为线偏振和圆偏振相干光时零拍检测器输出流的几率分布.

sunhorse

我想知道实验中homodyne detector是需要自己做呢，还是有成品可以买到？