论文部分内容阅读
用多模干涉原理分析和设计了光通信波长（１．３０μｍ～１．５５μｍ）的Ｓｉ１－ｘＧｅｘ／Ｓｉ滤波器，并用模的传播分析方法对其传输特性进行了研究。结果发现，在Ｇｅ含量ｘ＝０．０４时，干涉区的脊高和宽度分别为６．３５μｍ和８μｍ。如果多模干涉区长度ＬＭ＝２３０２．５μｍ，可滤１．３０μｍ而通１．５５μｍ的波长。且具有３１ｄＢ的对比度和０．０１ｄＢ的插入损耗；如果多模干涉区长度ＬＭ＝２５１２．５μｍ，可滤１．５５μｍ而通１．３０μｍ的波长。具有１６ｄＢ的对比度和０．０９ｄＢ的插入损耗。
The Si1-xGex / Si filter with optical communication wavelength (1.30μm ~ 1.55μm) was analyzed and designed by using the principle of multimode interference. The transmission characteristics of the Si1-xGex / Si filter were studied by the mode propagation analysis method. The results show that the ridge height and width of the interference region are 6.35μm and 8μm at the Ge content of x = 0.04. If the length of the multimode interference zone is LM = 2302.5μm, a wavelength of 1.30μm and 1.55μm can be filtered. And has a contrast of 31 dB and an insertion loss of 0.01 dB; if the length of the multimode interference region is LM = 2512.5 μm, a wavelength of 1.55 μm can be filtered while passing through 1.30 μm. With 16dB contrast and 0.09dB insertion loss.