摘要(英) |
Abstract
In this thesis, we design the wavelength demultiplexer in the optical communication, which has been fabricated in the primary stage. It will be realized in the silicon wafer, and its elements include a fiber input, a concave diffraction grating and 4 fiber output.
We use the optical design software(Zemax) to design the whole optical path layout, including the position of the input fiber, concave diffraction grating and the output fiber.
Concave diffraction grating is designed by the Rowland Circle where the input and output fiber are located. Due to diffraction at the high order, the grating is designed as echelle to increase its diffraction efficiency.
We import the structure of the wavelength demultiplexer (size:lengh 12mm, width 2mm) into the optical waveguide software(BeamPROP), which resulted in the five (wavelengh:1.54, 1.545, 1.55, 1.555, 1.56μm) Channel Passbands (half-width : 0.4nm) .
We shall use the semiconductor processing method to fabricate this device model. The process includes mask design, photolithography, and etching. We shall use the ICP-RIE for etching process to increase the product diffraction efficiency. |
參考文獻 |
參考文獻
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