A 1.31/1.55 □m multimode interference based wavelength demultiplexer aided by computer-generated planar holograms is proposed. The device length is not limited to the common multiples of the beat lengths for the two wavelengths. The demultiplexer length is chosen as the first selfimaging length for 1.55 □m input, and a computer-generated holographic pattern is used to image the 1.31 □m input to the cross output port. The design and optimization of the holographic pattern is presented. The device performance is investigated using the beam propagation method.
All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics