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Design and simulation of multimode interference based demultiplexers aided by computer-generated planar holograms.
1Department of Electro-Optical Engineering, National Cheng Kung University, No. 1 University Road, Tainan 701, Taiwan.
Optics Express
|July 1, 2010
Summary
This study proposes a novel wavelength demultiplexer using computer-generated holograms. It efficiently separates 1.31 and 1.55 micrometer wavelengths without device length limitations.
Area of Science:
- Photonics and optical engineering
- Holography and diffractive optics
Background:
- Wavelength demultiplexers are crucial for optical communication systems.
- Traditional designs often face limitations in device length and efficiency for specific wavelength pairs.
Purpose of the Study:
- To propose a novel multimode interference based wavelength demultiplexer.
- To utilize computer-generated planar holograms for enhanced performance.
- To overcome device length limitations in demultiplexer design.
Main Methods:
- Design and optimization of a computer-generated holographic pattern.
- Utilizing multimode interference principles.
- Employing the beam propagation method for performance investigation.
Main Results:
- The proposed demultiplexer is not restricted by common multiples of beat lengths.
- The device length is optimized for the first self-imaging length at 1.55 micrometers.
- The holographic pattern successfully images the 1.31 micrometer input to the cross output port.
Conclusions:
- Computer-generated holograms offer a flexible approach to wavelength demultiplexer design.
- The proposed method enables efficient wavelength separation with optimized device dimensions.
- This technology has potential applications in advanced optical communication systems.
