Optimized Gallium Arsenide Modulators for Advanced Modulation Formats

Walker, Robert G.; Cameron, N.; Zhou, Yixuan; Clements, S.J.

doi:10.1109/jstqe.2013.2266321

Cited by 28 publications

(16 citation statements)

References 32 publications

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“…Thus, the velocitymatch is set by both the coplanar geometry and the electrode properties, either built into the epitaxial layer-structure (mainly the depletion thickness 'd') and others in the layout.e.g. width and segmentation filling-factor 11 . For highfrequency operation the RF dispersion is equally important.…”

Section: Velocity Matching and Rf Designmentioning

confidence: 99%

50GHz gallium arsenide electro-optic modulators for spaceborne telecommunications

Walker

Cameron

Zhou

et al. 2019

International Conference on Space Optics — ICSO 2018

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Travelling-wave electro-optic modulators designed for V-band space applications using gallium arsenide guided-wave technology are presented. The designs feature a low-loss folded optical configuration giving straight-line RF access at one end of the chip, with all optical I/O via the opposite end. This configuration enables the close-packed monolithic modulator arrays needed for phased-array applications, contributes to high modulation bandwidths with low ripple by eliminating directional change in the RF feed arrangements and facilitates compact packaging. While only 1550nm designs are reported here, the AlGaAs material system is versatile, permitting modulators to be realized for a wide range of optical wavelengths, with particular advantage in drive-power at shorter wavelengths. Both single MZ and monolithic dualparallel (IQ) modulators have been assessed up to 70GHz; bandwidths around 50GHz are achieved with low-frequency V of 4.6V. Typically, the folded devices are half the length of conventional format modulators and can accommodate 4 device arrays in the same width package.

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Section: Velocity Matching and Rf Designmentioning

confidence: 99%

50GHz gallium arsenide electro-optic modulators for spaceborne telecommunications

Walker

Cameron

Zhou

et al. 2019

International Conference on Space Optics — ICSO 2018

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“…Low loss small-radius bends can be implemented using GaAs ridge waveguides [8]. For this reason, GaAs is well-suited to realizing modulator configurations of higher functionality in which more than one MZM is integrated onto a single chip.…”

Section: Rf Inline Configurationsmentioning

confidence: 99%

“…Multi-mode interference (MMI) principles are used to design various optical couplers, splitters and recombiners [8] such as the 2x2 recombiner shown in the upper inset of Fig. 5.…”

Section: A Optical Couplers and Bendsmentioning

confidence: 99%

Electro-optic modulators for space using gallium arsenide

Walker

Cameron

Zhou

et al. 2017

International Conference on Space Optics — ICSO 2016

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“…The proposed waveguide design can be used in the substrate removed GaAs/AlGaAs electro-optic modulator [3], in novel T rail electrodes for substrate removed low voltage high speed GaAs/AlGaAs electro optic modulator [4] and in optimized GaAs/AlGaAs modulators for advance modulation format [11].…”

Section: -mentioning

confidence: 99%

Design and simulation of optical waveguide for electro-optic modulator

Khan¹,

Mehra²

2014

2014 International Conference on Advances in Engineering &Amp; Technology Research (ICAETR - 2014)

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Optical waveguide is the backbone of an electrooptic modulator (EOM). In this paper an optical waveguide design is proposed for EOM. The proposed optical waveguide provide better impedance and velocity matching to the electrode as compare to the previous work done on electro-optic modulator. In addition to this, the push pull technique and polymer integration used in the design of EOM reduces required drive voltage and increase the speed of operation. Travelling wave structure is used in the proposed design, which is proved to be advantages for EOM as there is no limitation on modulator speed due to resistance and capacitance as in lumped element design. The electrode parameters are analysed with the help of an electro-optic solver tool.

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Optimized Gallium Arsenide Modulators for Advanced Modulation Formats

Cited by 28 publications

References 32 publications

50GHz gallium arsenide electro-optic modulators for spaceborne telecommunications

50GHz gallium arsenide electro-optic modulators for spaceborne telecommunications

Electro-optic modulators for space using gallium arsenide

Design and simulation of optical waveguide for electro-optic modulator

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