Fabry–PÉrot Electroabsorption Modulators for High-Speed Free-Space Optical Communication

Wang, Qin; Junique, Stéphane; Agren, Daniel; Noharet, Bertrand; Andersson, Jan Y.

doi:10.1109/lpt.2004.827855

Cited by 21 publications

(12 citation statements)

References 7 publications

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“…Extensive calculations were performed to optimise the modulator structure with respect to the angle of incident of the light impinging on the modulator. The developed models consisted of a suite of programs described in detail previously [12,13]. Simulated performance parameters were e.g.…”

Section: Reflective Multiple Quantum Wells Optical Modulatorsmentioning

confidence: 99%

A novel free-space retrocommunication link

et al. 2004

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Retrocommunication is a new technique for asymmetric free-space optical communication that has attracted interest during recent years. Novel technologies such as multiple quantum well (MQW) optical modulators and non-mechanical laser beam steering and tracking have been studied for implementation in a retrocommunication link. Large and small aperture reflective AlGaAs/GaAs MQW modulators were optimised and fabricated. The modulators exhibit high contrast ratios (from 5 to 100) and high modulation rates (up to 16 Mbit/s). A retroreceiver consisting of four large aperture MQW modulators, associated optics and drive electronics was fabricated. Nematic liquid crystal spatial light modulators have been evaluated, characterised for beam steering and tracking and implemented in a transceiver. Small area MQW modulators, used in focal plane configurations, were studied for static communication links. Results from a novel retrocommunication link utilising a retroreceiver and non-mechanical laser beam steering and tracking will be presented. Bit rates of 8 Mbit/s were observed during non-mechanical tracking of a moving retroreceiver over 100 m range. The demonstrator system was capable of transferring audio-, real-time images or bit streams. The demonstrated principles show promising features for future low weight free-space communication links. Performance calculations including requirements for a retrocommunication link using MQW modulators and non-mechanical beam steering are discussed.

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Section: Reflective Multiple Quantum Wells Optical Modulatorsmentioning

confidence: 99%

A novel free-space retrocommunication link

et al. 2004

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“…Nowadays, besides continuous improvements of the performance of both TW and SN MQW EAMs as a general technology platform, various formats of EAMs and their 1 or 2 dimensional (1D/2D) arrays have been manufactured according to customized specifications including desired operating wavelength, extinction ratio of amplitude or phase modulation, insertion loss and modulation frequency. By optimization of the impedance of EAMs through adjusting device dimension and contact resistance, we have demonstrated surface normal EAM's operating at up to 10 Gb/s in wavelength range from 850 nm and 1550 nm for different applications [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Recent developments in electroabsorption modulators at Acreo Swedish ICT

Wang¹,

Zhang²,

Almqvist³

et al. 2015

SPIE Proceedings

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Three types of electroabsorption modulators (EAMs) based on III-V semiconductor multiple quantum wells (MQW) are presented in this work. One is a novel monolithic integration traveling-wave EAM for an analog optical transmitter/transceiver to achieve integrated photonic mm-wave functions for broadband connectivity. Another one is composed of an integrated EAM 1D array in a photonic beam-former as a Ku-band phased array antenna for seamless aeronautical networking through integration of data links, radios, and antennas. The third one addresses the use of MQW EAMs in free space optical links through biological tissue for transcutaneous communication.

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“…Electro-absorption (EA) modulators are one of the key components of contemporary fiber-optics communication, optical networks and high-speed free space optical interconnects due to their high-speed operation ability, improved modulation efficiency, high contrast, low driving voltage, low biasing voltage, low chirp, wide bandwidth, small size and the possibility of monolithic integration with other semiconductor components [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

“…Embedding an absorbing medium into a resonator increases an extinction ratio and modulation efficiency of the modulator [3,4,10]. Mirrors of resonator can be made of either metallic layers and distributed Bragg reflectors (DBRs) as well [10].…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of impact of DBRs' outermost layers on optical characteristics of a surface-normal electro-absorption modulator by the method of single expression

Baghdasaryan

Knyazyan

Berberyan

et al. 2009

2009 11th International Conference on Transparent Optical Networks

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An optical model of a surface-normal electro-absorption (EA) modulator consisting of multiple-quantum wells (MQWs) embedded in an asymmetric Fabry-Perot (FP) cavity formed by high-reflective back DBR and moderate-reflective top DBR separated from MQWs at both sides by buffer layers is analysed numerically by the method of single expression (MSE). Reflectance of the modulator versus normalised thickness of the buffer layer is analysed for different alternation of quarter-wavelength layers of DBRs. Corresponding optical field patterns, distributions of power flow density and permittivity profiles along the modulator structures with different alternation of DBR layers are presented for low reflection state. The contrast of EA modulator with DBRs of high permittivity layers outermost depending on the operating wavelength is analysed for different values of imaginary part of a permittivity of quantum-well (QW) layers. In the result of modelling corresponding design rules for optimisation of surface-normal EA modulators are suggested.

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Fabry–PÉrot Electroabsorption Modulators for High-Speed Free-Space Optical Communication

Cited by 21 publications

References 7 publications

A novel free-space retrocommunication link

A novel free-space retrocommunication link

Recent developments in electroabsorption modulators at Acreo Swedish ICT

Numerical analysis of impact of DBRs' outermost layers on optical characteristics of a surface-normal electro-absorption modulator by the method of single expression

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