Abstract
Since first proposed as a total internal reflection (TIR) device in 1978 [1], X-branch waveguide devices have been studied extensively [2], Their characteristics in terms of the extinction ratio, insertion loss, device dimension prove to be very attractive. The widened X branch (Fig 1) offers the additional advantage of a simpler fabrication process, as there is only one step involved in the ion-exchange. However, in the commonest two mode interference operation region, the requirements on the design parameters of a widened X-branch type demultiplexer are tight, when one wants to achieve wavelength demultiplexing [3], specially in a device made in a glass substrate, which allows little possibilities of an electrooptic adjustment. To find the best point for demultiplexing one can use, the following parameter R [4]:
© 1993 Optical Society of America
PDF ArticleMore Like This
L. JM. Babin and G. L. Yip
FE4 Integrated Photonics Research (IPR) 1994
F. Xiang and G.L. Yip
GTuC3 Gradient-Index Optical Imaging Systems (GIOIS) 1994
F. XIANG and G.L. YIP
ThF19 Integrated Photonics Research (IPR) 1994