Two types of waveguide power splitters based on a bending multimode waveguide are demonstrated for an unbalanced power splitting ratio. An arbitrary splitting ratio is achieved by choosing the bending radius and the length of the multimode section appropriately. Experimental results show that the fabricated devices have wide bandwidth.
[Show abstract][Hide abstract] ABSTRACT: The filter response of single-ring resonators with integrated semiconductor optical amplifiers based on GaInAsP-InP is presented. The devices with free spectral ranges of 25 and 50 GHz have the form of a racetrack. An on-off ratio of 20 dB, a full-width at half-maximum of 12 and 24 pm, a finesse of 17, and a Q factor of 130,000 and 65,000, respectively, have been achieved. The tuning to a specific wavelength is performed by using integrated Pt-resistors.
[Show abstract][Hide abstract] ABSTRACT: The authors propose a novel 2×2 multimode interference (MMI)
coupler that provides an arbitrary power splitting ratio. The proposed
coupler has a cladding-filled gap in the centre of its MMI region.
Couplers fabricated using a silica-based planar lightwave circuit
exhibited splitting ratios from 0-100% with excess losses <1 dB
[Show abstract][Hide abstract] ABSTRACT: We have investigated important issues such as the power loss, the loss imbalance the fabrication tolerances, and the wavelength dependence for the design of a multimode interference-based 3-dB splitter on deeply etched InP waveguides under general, restricted, and symmetric interference mechanisms. For this investigation, we used the finite-element-based beam propagation approach. Results are presented.
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