Low-reflection photonic-crystal taper for efficient coupling between guide sections of arbitrary widths

Abstract

. Low-reflection photonic-crystal taper for efficient coupling between guide sections of arbitrary widths.

Modal behavior of single-line photonic crystal guiding structures on InP substrate

“…These established facts strengthen our earlier proposal [9] to find the optimal trade-off between propagation losses and bending/combining geometries, by combining a wide PCW in straight sections and W1-based bends/combiners taking advantage of a tapering transition in-between.…”

“…2(b). A tapered section based on a gradual variation of hole sizes and depths [9] is inserted at every ridge/W1 transition. To address the u = 0.28 frequency domain mode (λ = 1.5 m, a = 450 nm), we have fabricated a taper distributed on 10 rows as visible in Fig.…”

“…The W1 PCW, a strong-confinement structure, suffers from poor coupling to any classical InP compatible ridge guide. We have designed and measured a PC-based taper [9] that overcomes this difficulty and allows us to address the modal properties of PC bends and splitters.…”

Four-port coupled channel-guide device based on 2D photonic crystal structure

“…The same approach was also used in W3 channel waveguide bends to reduce the width of the corner, improving the modal propagation and increasing the transmission efficiency [18].…”

Coupling techniques between dielectric waveguides and planar photonic crystals.

“…In the previous chapters, we have seen that these waveguides may be efficiently coupled to conventional index-guiding dielectric waveguides. Furthermore, efficient coupling between line defect waveguides of arbitrary widths has also been experimentally demonstrated [Tal02]. In a different kind of photonic crystal waveguide, known as coupled cavity waveguide (CCW) or coupled-resonator optical waveguide (CROW), only some evenly spaced point defects or cavities are created along a crystal direction [Ste98,Yar99].…”