Performance Optimization of a Reconfigurable Waveguide Digital Optical Switch on InGaAsP-InP: Design, Material, and Carrier Dynamics

The design and performance of an InGaAsP-InP 1 times 2 reconfigurable waveguide digital optical switch (RW-DOS) actuated by carrier-induced refractive index modulation is described. Using a device model based on the two-dimensional beam propagation method, we present an analysis of the role of mater...

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Bibliographic Details
Published in:IEEE journal of quantum electronics 2007-12, Vol.43 (12), p.1147-1158, Article 1147
Main Authors: Ng, S., Janz, S., McKinnon, W.R., Barrios, P., Delage, A., Syrett, B.A.
Format: Article
Language:English
Subjects:
Carrier injection
Carriers
Design engineering
Devices
Digital
Digital modulation
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
integrated optoelectronics
Mathematical models
Optical design
Optical elements, devices, and systems
Optical materials
Optical propagation
Optical switches
Optical switching
Optical waveguides
Optical waveguides and coupleurs
Optics
Optimization
Performance analysis
Photonic band gap
Physics
Refractive index
Switching
Wave optics
Wave propagation, transmission and absorption
waveguide components
Waveguides
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Summary:The design and performance of an InGaAsP-InP 1 times 2 reconfigurable waveguide digital optical switch (RW-DOS) actuated by carrier-induced refractive index modulation is described. Using a device model based on the two-dimensional beam propagation method, we present an analysis of the role of material bandgap, carrier lifetime, and waveguide design on the switch performance. The model results are compared with experimental measurements of carrier-induced index change and switching performance for RW-DOS devices and test structures fabricated in InGaAsP alloys with waveguide core compositions of Q = 1.2, Q = 1.3, and Q = 1.4 mum. We discuss compromises between power consumption, switching speed, and propagation loss. The optimized InGaAsP-InP devices exhibited better than 25-dB switching contrast ratio and require less than 20-mA drive current.
ISSN:0018-9197
1558-1713
DOI:10.1109/JQE.2007.905036