Abstract
We present the simulation, fabrication and characterization of novel low-loss photonic crystal (PhC) defect waveguides for transverse magnetic (TM) polarized light in the InP/InGaAsP material system. Minimal propagation losses for the proposed W4 PhC waveguides as low as ∼300 dB/cm at λ= 1550 nm for lattice constant a = 350 nm, and ∼500 dB/cm at λ= 1532 nm for lattice constant a = 590 nm are obtained from the cut-back analysis. In addition, an associated application of proposed wide PhC waveguides as intermediate short tapers between deeply etched access waveguides and narrower quasi-single-mode PhC waveguides is investigated. Predicted improved coupling efficiency has been validated experimentally.
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