InthisLetter,weproposeanopticalattenuatorbasedonthephasemodulationofaspatiallightmodulator(SLM).Inthissystem,weusetwopolarizedbeamsplitters(PBSs)tocontrolthepolarizedlightandoneSLMtomodulatethephaseofthepolarizedlight.Intheinitialstate,thelightbeamisdividedintop-lightands-lightwhenitpassesthroughthefirstPBS.WhenthelightpassesthroughthesecondPBS,s-lightisreflectedandp-lightisdetectedbytheCCDcamera.Byloadingdiffe
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