IEEE Photonics Technology Letters · 1993 · 39 citations · 7 references
EngineeringElectrical EngineeringMaterials ScienceOptoelectronicsPhotonicsSemiconductor DevicesDirectional CouplersHigh-frequency Semiconductor DevicesMicrowave FiltersOptical WaveguidesWaveguidesCurrent InjectionRidge WaveguidesThermal TuningTunable Directional CouplersTuningTuning RangeWaveguide CouplingWaveguide Filters
The design of a broad-electrotuning-range (>73 nm) and narrow-bandwidth ( approximately 1.5 nm) InGaAsP/InP tunable directional coupler filter that uses two vertically coupled asymmetric ridge waveguides is described. The filter operates with both current injection and electrorefraction. This is the widest tuning range reported to date for a semiconductor waveguide filter and is obtained with a moderate current level ( approximately 1.1 kA/cm/sup 2/). The tuning range can be extended to >80 nm if the thermal tuning is included.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
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Tunable optical waveguide directional coupler filter
R. C. Alferness, R. V. Schmidt · Applied Physics Letters · 1978 · 111 citations
Directional-coupler filter using dissimilar optical fibres
D. Marcuse · Electronics Letters · 1985 · 35 citations