摘要:

In the last years much effort has been taken to arrive at optical integrated circuits with high complexity and advanced functionality. For this aim high index contrast structures are employed resulting in photonic wires in conventional index guiding waveguides or in photonic bandgap structures. In both cases the number of functional elements within a given chip area can be enhanced by several orders of magnitude: VLSI photonics. In this talk optical microresonators are presented as promising basic building blocks for filtering, amplification, modulation, switching and sensing. Active functions can be obtained by monolithic integration or a hybrid approach using materials with thermo‐, electro‐ and opto‐optic properties and materials with optical gain. Examples are mainly taken from work at MESA+. © 2004 American Institute of Physics

ISSN:0094-243X    

DOI:10.1063/1.1764011

出版商:AIP    

年代:1904

数据来源: AIP

摘要:

The linear properties of one dimensional resonant cavities are discussed by using the matrix and the ray method. Fabry‐Perot, photonic crystals and unidimensional cavities in photonic band gap structures are considered. Quasi‐normal modes for the description of the electromagnetic field in open cavities are introduced and some applications are given. © 2004 American Institute of Physics

ISSN:0094-243X    

DOI:10.1063/1.1764012

出版商:AIP    

年代:1904

数据来源: AIP

摘要:

Optical ring resonators are commonly discussed on the basis of a frequency‐domain model, that divides a resonator into coupler elements, ring cavity segments, and the straight port waveguides. We look at the assumptions underlying this model and at its implications, including remarks on reciprocity/symmetry arguments, the general power transfer characteristics, the resonance condition, the spectral distance and width of the resonances, the quantities that describe the resonator performance, and a few remarks about tuning. A survey of bend mode properties and a coupler description in terms of coupled mode theory fills the abstract notions of the model. As an example for devices that rely on a standing wave principle, in contrast to the traveling waves found in the microrings, we consider in less detail microresonators with square or rectangular cavity shapes. Also here a frequency domain coupled mode theory can be applied that opens up simple possibilities to characterize resonant configurations. © 2004 American Institute of Physics

ISSN:0094-243X    

DOI:10.1063/1.1764013

出版商:AIP    

年代:1904

数据来源: AIP

摘要:

Numerical calculation of optical field distribution, resonance wavelength and finesse of circular ring and disk microresonators is discussed. Similarities and differences between the bent waveguide and complex frequency approaches are demonstrated on 2D microresonators. Robust immittance formulation of the mode matching method is described in some details, and problems with accurate numerical evaluation of resulting expressions containing combinations of cylindrical functions are mentioned. Very strong dependence of the finesse of low‐contrast (e.g., polymer) microresonators on their cross‐sectional refractive index profile is demonstrated using numerical examples. © 2004 American Institute of Physics

ISSN:0094-243X    

DOI:10.1063/1.1764014

出版商:AIP    

年代:1904

数据来源: AIP

摘要:

The large index contrast waveguides design and tolerances is discussed. The application of these waveguides for micro‐ring resonators and other optical signal processing devices is introduced. Some prototype example devices using polymers are presented. © 2004 American Institute of Physics

ISSN:0094-243X    

DOI:10.1063/1.1764015

出版商:AIP    

年代:1904

数据来源: AIP

摘要:

We describe the theory of optical ring resonators, and our work on GaAs‐AlGaAs and GaInAsP‐InP optical micro‐ring resonators. These devices are promising building blocks for future all‐optical signal processing and photonic logic circuits. Their versatility allows the fabrication of ultra‐compact multiplexers/demultiplexers, optical channel dropping filters, lasers, amplifiers, and logic gates (to name a few), which will enable large‐scale monolithic integration for optics. © 2004 American Institute of Physics

ISSN:0094-243X    

DOI:10.1063/1.1764016

出版商:AIP    

年代:1904

数据来源: AIP

摘要:

The ring resonator is an obliged step in the path towards large scale integrated photonic circuits. In this work we focus on passive ring resonators for applications in the modern WDM systems and a ‘best working point’ is suggested. Both a theoretical and an experimental deep investigation is carried out on two basic structures: the single ring phase shifter and the single ring wavelength filter, realized by SiON technology with a 6&percent; index contrast. It is demonstrated that an accurate modelling of directional couplers leads to the proper recovery of the circuit parameters and of the group delay and enables the design of more complex ring‐based structures. © 2004 American Institute of Physics

ISSN:0094-243X    

DOI:10.1063/1.1764017

出版商:AIP    

年代:1904

数据来源: AIP

摘要:

Microcavity lasers are of interest for both fundamental studies of cavity quantum electrodynamics and for potential applications in all‐optical networks. Microrings and microdisks are especially suited for fabricating polymer microcavity lasers. Current research with microcavity lasers has focussed on two areas : (1) laser threshold minimization and (2) directional laser emission. Laser emission is obtained with different optical pumping configurations according the cavity shapes. We present the lasing characteristics of optically pumped luminescent polymer microcavities. Geometrical parameters and pumping configurations are investigated to modify the lasing threshold and the directionality of emissions. © 2004 American Institute of Physics

ISSN:0094-243X    

DOI:10.1063/1.1764018

出版商:AIP    

年代:1904

数据来源: AIP

摘要:

There is a great potential of microring‐resonators as optical add/drop‐multiplex modules in photonics with very large scale integration. The area consumption per ring is incredibly small, and complex circuitry seems feasible. But, en route to application the production of ring resonators has to ensure specifications which can compete with those of other frequency periodic/selective devices. This ultimately leads to tight fabrication tolerances, and polarisation dependence and insertion loss of an unit enter the assessment as well. Capabilities to manufacture microring‐resonator devices with different materials and technologies are valuated in this context. © 2004 American Institute of Physics

ISSN:0094-243X    

DOI:10.1063/1.1764019

出版商:AIP    

年代:1904

数据来源: AIP

摘要:

Nonlinear optical and electro‐optic materials are potentially very interesting for VLSI photonic applications. The required material parameters for devices such as active microring resonators are discussed. Organic nonlinear materials are considered as especially attractive due to relatively high and fast nonlinearities compared to their inorganic counterparts. Design strategies for nonlinear organic materials are reviewed and the issue of improving their thermal and photostability is discussed. © 2004 American Institute of Physics

ISSN:0094-243X    

DOI:10.1063/1.1764020

出版商:AIP    

年代:1904

数据来源: AIP