High-speed InGaAlAs-InAlAs MQW directional coupler waveguide switch modules integrated with a spotsize converter having a lateral taper, thin-film core, and ridge

Kobayashi, Masaki; Kawano, Kenji; Sekine, S.; Takeuchi, Hiroaki; Yoshimoto, Naoto; Wada, Masato; Ito, Tsuyoshi; Yanagibashi, M.; Kondo, Susumu; Noguchi, Yoshio; Naganuma, M.

doi:10.1109/50.827508

Cited by 8 publications

(4 citation statements)

References 13 publications

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“…As the last example, the present method is used to analyze the InP-based multiple quantum well (MQW) rib waveguide. To date, the InP-based MQW material system has been widely applied to electroabsorption modulators (EAMs), directional coupler (DC)/Mach-Zehnder (MZ)/multimode interference (MMI) optical switches/modulators (OS/Ms), and semiconductor lasers due to its good quantum confined Stark effect (QCSE) at 1.55 µm window [1,[20][21][22][23][24] . Both passive and active photonic/optoelectronic devices can be realized by using this material system, thus it is a good candidate for PLCs/PICs.…”

Section: Inp-based Multiple Quantum Well Rib Waveguidementioning

confidence: 99%

An improved three-dimensional full-vectorial finite-difference imaginary-distance beam propagation method

Xiao

Cai

et al. 2006

SCI CHINA SER F

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A modified alternating direction implicit approach is proposed to discretize the three-dimensional full-vectorial beam propagation method (3D-FV-BPM) formulation along the longitudinal direction. The cross-coupling terms (CCTs) are neglected at the first substep, and then double used at the second substep. The order of two substeps is reversed for each transverse electric field component so that the CCTs are always expressed in an implicit form, thus the calculation is efficient and stable. Based on the multinomial interpolation, a universal finite difference scheme with a high accuracy is developed to approximate the 3D-FV-BPM formulation along the transverse directions, in which the discontinuities of the normal components of the electric field across the abrupt dielectric interfaces are taken into account and can be applied to both uniform and non-uniform grids. The corresponding imaginary-distance procedure is first applied to a buried rectangular and a GaAs-based deeply-etched rib waveguide. The field patterns and the normalized propagation constants of the fundamental and the first order modes are presented and the hybrid nature of the full-vectorial guided-modes is demonstrated, which shows the validity and utility of the present approach. Then the modal characteristics of the deeply-and shallow-etched rib waveguides based on the InGaAsp/InGaAsP strained multiple quantum wells in InP substrate are investigated in detail. The results are necessary for modeling and the design of the planar lightwave circuits or photonic integrated circuits based on these waveguides.

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Section: Inp-based Multiple Quantum Well Rib Waveguidementioning

confidence: 99%

An improved three-dimensional full-vectorial finite-difference imaginary-distance beam propagation method

Xiao

Cai

et al. 2006

SCI CHINA SER F

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“…5,6 The semiconductor based PLCs have not yet reached such a high level of maturity, however, devices in this material are attractive because they offer the potential of monolithic integration of both active and passive devices together with electronic circuits. 7,8 The downside is that these devices generally have relatively high propagation and fiber coupling losses.…”

Section: Introductionmentioning

confidence: 99%

Hybrid-integrated optical isolators and circulators

Fujita¹,

Gerhardt²,

Eldada³

2002

SPIE Proceedings

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Magneto-optics is an area that is uniquely enabling for the production of non-reciprocal components such as optical isolators and circulators. The concepts behind the non-reciprocity include nonreciprocal polarization rotation (Faraday rotation) and nonreciprocal phase shift. A magneto-optic material that is magnetized in the direction of propagation of light acts as a Faraday rotator. An asymmetric magneto-optic waveguide that is magnetized perpendicular to the propagation direction acts as a nonreciprocal phase shifter. Both effects can be utilized to realize nonreciprocal devices. Today, commercial isolators and circulators are strictly bulk components, and as such they constitute the only type of optical component that is not available in integrated form. However, the technology for integrated nonreciprocal devices has been maturing and is expected to have a considerable impact in the communication industry by enabling the integration of complete optical subsystems. We report on the development of integrated optical isolators and circulators that consist of polymer-based planar interferometers with inserted thin films of cerium-substituted Yttrium Iron Garnet (Ce-YIG) for efficient Faraday rotation, and thin films of LiNbO 3 for wave-retarders that enable polarizationindependent operation.

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“…An optical switch in an optical router would ideally have low power consumption, small size, scalability, and data-format transparency, as well as a high-speed switching capability. Although such an ideal optical switch has never been realized, a variety of optical switching technologies have been proposed, including LiNbO 3 -, GaAs-, or InP- based crosspoint switches with a multistage configuration [4], broadcast-and-select switches based on semiconductoroptical-amplifier (SOA) gate arrays [5], and wavelengthrouting switches (WRSs) based on tunable wavelength converters (TWCs) followed by an arrayed-waveguide grating (AWG) [6]. Among these technologies, the WRS would have low power consumption and high scalability for larger throughput.…”

Section: Introductionmentioning

confidence: 99%

Monolithically Integrated Wavelength-Routing Switch Using Tunable Wavelength Converters with Double-Ring-Resonator Tunable Lasers

Segawa

Matsuo

Kakitsuka

et al. 2011

IEICE Trans. Electron.

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We present an 8 × 8 wavelength-routing switch (WRS) that monolithically integrates tunable wavelength converters (TWCs) and an 8 × 8 arrayed-waveguide grating. The TWC consists of a double-ringresonator tunable laser (DRR TL) allowing rapid and stable switching and a semiconductor-optical-amplifier-based optical gate. Two different types of dry-etched mirrors form the laser cavity of the DRR TL, which enable integration of the optical components of the WRS on a single chip. The monolithic WRS performed 1 × 8 high-speed wavelength routing of a nonreturn-to-zero signal at 10 Gbit/s. The switching operation was demonstrated by simultaneously using two adjacent TWCs.

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High-speed InGaAlAs-InAlAs MQW directional coupler waveguide switch modules integrated with a spotsize converter having a lateral taper, thin-film core, and ridge

Cited by 8 publications

References 13 publications

An improved three-dimensional full-vectorial finite-difference imaginary-distance beam propagation method

An improved three-dimensional full-vectorial finite-difference imaginary-distance beam propagation method

Hybrid-integrated optical isolators and circulators

Monolithically Integrated Wavelength-Routing Switch Using Tunable Wavelength Converters with Double-Ring-Resonator Tunable Lasers

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