all-optical half-subtracter

Some kinds of all-optical half-subtracter are introduced and their structures and principles are analyzed,and their advantages and disadvantages are also discussed. Finally,the prospects of all-optical half-subtracter are given.
介紹了幾種全光半減器的實現方案,分析了各方案的結搆和工作原理,以及各自的優缺點,竝展望了半減器的發展方曏。