Wavelength division multiplexing and demultiplexing with photonic crystal waveguide couplers

Koshiba, Masanori

doi:10.1109/50.971693

Cited by 296 publications

(133 citation statements)

References 13 publications

Supporting

Mentioning

129

Contrasting

Unclassified

Order By: Relevance

“…While in a conventional resonator the coupling is evanescent, the coupling between ABRs is direct (i.e., radiative)-similar to the coupling between PC waveguides and defect cavities [32]- [35]. The radiative coupling mechanism has some advantages and drawbacks compared to evanescent coupling.…”

Section: B Telecommunicationmentioning

confidence: 99%

InGaAsP annular Bragg lasers: theory, applications, and modal properties

Scheuer

Green

DeRose

et al. 2005

IEEE J. Select. Topics Quantum Electron.

View full text Add to dashboard Cite

Abstract-A novel class of circular resonators, based on a radial defect surrounded by Bragg reflectors, is studied in detail. Simple rules for the design and analysis of such structures are derived using a transfer matrix formalism. Unlike conventional ring resonators, annular Bragg resonators (ABR) are not limited by the total internal reflection condition and can exhibit both large free spectral ranges and low bend losses. The Bragg reflection mechanism enables the confinement of light within a defect consisting of a low refractive index medium (such as air). Strong atom-photon interaction can be achieved in such a structure, making it a promising candidate for sensing and cavity quantum electrodynamics applications. For sensing applications, we show that the ABR structure can possess significantly higher sensitivity when compared to a conventional ring resonator sensor. Lasing action and low threshold levels are demonstrated in ABR lasers at telecommunication wavelengths under pulsed optical pumping at room temperatures. The impact of the intensity and dimensions of the pump spot on the emitted spectrum is studied in detail.

show abstract

Section: B Telecommunicationmentioning

confidence: 99%

InGaAsP annular Bragg lasers: theory, applications, and modal properties

Scheuer

Green

DeRose

et al. 2005

IEEE J. Select. Topics Quantum Electron.

View full text Add to dashboard Cite

show abstract

“…2 Two parallel waveguides can be used as a directional waveguide coupler. 3,4,5,6,7 On the other hand, it might be desirable to decouple the two waveguides to minimize cross talk between them, for instance when envisioning closely packed photonic wires in integrated optical circuits. 8 We study the coupling between two parallel waveguides in a square-lattice photonic crystal and find that the decoupling of the waveguides depends on the number of rods between the waveguides.…”

mentioning

confidence: 99%

Conditions for waveguide decoupling in square-lattice photonic crystals

Koponen

Huttunen²,

Törmä

2004

Journal of Applied Physics

View full text Add to dashboard Cite

We study coupling and decoupling of parallel waveguides in two-dimensional square-lattice photonic crystals. We show that the waveguide coupling is prohibited at some wavelengths when there is an odd number of rows between the waveguides. In contrast, decoupling does not take place when there is even number of rows between the waveguides. Decoupling can be used to avoid cross talk between adjacent waveguides. c 2004 Optical Society of America OCIS codes: 130. 3120,230.3120,230.3990,230.7370,250.5300. Two-dimensional photonic crystals are promising candidates for implementing integrated optical components. 1 Optical waveguiding in two-dimensional photonic crystals is achieved by introducing line defects in the structure that is otherwise periodic in two dimensions. 2 Two parallel waveguides can be used as a directional waveguide coupler. 3,4,5,6,7 On the other hand, it might be desirable to decouple the two waveguides to minimize cross talk between them, for instance when envisioning closely packed photonic wires in integrated optical circuits. 8 We study the coupling between two parallel waveguides in a square-lattice photonic crystal and find that the decoupling of the waveguides depends on the number of rods between the waveguides. If there is an odd number of rods between the waveguides, they are decoupled at a defined wavelength. In case of an even number of rods, the waveguides are coupled at all wavelengths. Previous studies such as 5 have considered an even number of rods and therefore not demonstrated the decoupling behavior.The studied geometry is a two-dimensional photonic crystal of cylindrical dielectric rods in a square-lattice in air. The dielectric constant of the rods is taken to be ǫ = 8.9ǫ 0 , their radius r = 0.2a and the lattice constant a = 512 nm. The photonic crystal has a large TE (electric field aligned with the cylinders) band gap around ω = 0.8πc/a, where a is the lattice constant of the crystal. With a = 512 nm, this gap is in the wavelength range from 1100 nm to 1600 nm. Two parallel waveguides are formed in the structure by removing two parallel rows of rods. The number of rods between the two waveguides is varied. In Fig. 1 (a) and (c) we show two examples of the geometries, i.e. one and two rows of rods between the waveguides. We have considered 1-7 rows of rods between the waveguides.The guided eigenmodes supported by this geometry have two possible parities with respect to the symmetry axis between the waveguides. These modes can be classified by the parity of the z-component of the electric field, E z . Following directly 1

show abstract

“…As mentioned before, PCs have gained great interest due to the availability of high density integrated optical circuitry (Joannopoulos et al, 2008;Yanik et al, 2004;Niemi et al, 2006;Koshiba, 2001;Fasihi & Mohammadnejad, 2009a, 2009bMekis et al, 1999;Loncar et al, 2000;Martinez et al, 2003;Shin et al, 2004;Yanik et al, 2003). PC waveguides provide an efficient means of guiding light by allowing the realization of sharp optical bends (Mekis et al, 1996).…”

Section: Photonic Crystal Hybrid Waveguides: Design and Modelingmentioning

confidence: 99%

Design and Modeling of WDM Integrated Devices Based on Photonic Crystals

Fasihi¹

2012

Optical Communications Systems

View full text Add to dashboard Cite

Wavelength division multiplexing and demultiplexing with photonic crystal waveguide couplers

Cited by 296 publications

References 13 publications

InGaAsP annular Bragg lasers: theory, applications, and modal properties

InGaAsP annular Bragg lasers: theory, applications, and modal properties

Conditions for waveguide decoupling in square-lattice photonic crystals

Design and Modeling of WDM Integrated Devices Based on Photonic Crystals

Contact Info

Product

Resources

About