论文信息 - Low-loss 1/spl times/2 multimode interference wavelength demultiplexer in silicon-germanium alloy

Low-loss 1/spl times/2 multimode interference wavelength demultiplexer in silicon-germanium alloy

A low-loss multimode interference wavelength demultiplexer for 1.3- and 1.55-/spl mu/m operations based on the silicon-germanium alloy material has been proposed and demonstrated. The device was fabricated by molecular beam epitaxy followed by lithography and plasma etching. The input/output facets were polished mechanically. The measured insertion losses are 4.29 and 4.28 dB and the extinction ratios are 25 and 22 dB at 1.3 and 1.55 /spl mu/m, respectively.

[1] M. R. Paiam,et al. Compact planar 980/1550-nm wavelength multi/demultiplexer based on multimode interference , 1995, IEEE Photonics Technology Letters.

[2] G. L. Yip,et al. A TM Y-branch wavelength multi/demultiplexer by K/sup +/ and Ag/sup +/ ion-exchange for /spl lambda/=1.31 and 1.55 /spl mu/m , 1996 .

[3] H. Melchior,et al. Low-loss 1/spl times/N multimode interference couplers with homogeneous output power distributions realised in silica on Si material , 1997 .

[4] R.I. MacDonald,et al. A 12-channel phased-array wavelength multiplexer with multimode interference couplers , 1998, IEEE Photonics Technology Letters.

[5] W. Y. Lee,et al. Guided-wave 1.3/1.55 [micro sign]m wavelength division multiplexer based on multimode interference , 1996 .

[6] E.C.M. Pennings,et al. Optical multi-mode interference devices based on self-imaging: principles and applications , 1995 .