Design Of Efficient And Wideband Travelling-Wave Modulators

Parsons, Nick; O’Donnell, Aidan; Wong, K. K.

doi:10.1117/12.938143

Cited by 12 publications

(3 citation statements)

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“…To evaluate the modulation bandwidth of the IOH modulator more precisely, we applied the RF transmission line model on the slot waveguide. [29][30][31] As shown in Fig. 3, the slot waveguide region consists of resistance R s and capacitance C s per a unit length.…”

Section: Rf Transmission Line Modelmentioning

confidence: 99%

Numerical evaluation of bandwidth and optical loss in InP-organic hybrid optical modulator with doping optimization

Sakumoto,

Nakayama,

Miyatake

et al. 2024

Jpn. J. Appl. Phys.

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We examine the influence of doping profile optimization on the trade-off relationship between modulation bandwidth and optical loss in an InP-organic hybrid (IOH) optical modulator, comparing it with a Si-organic hybrid (SOH) optical modulator. By incorporating the RF transmission line model, which enables a more precise modulation bandwidth analysis than the RC constant model, we demonstrate that the IOH modulator can achieve a modulation bandwidth of over 500 GHz with a 2 dB loss, capitalizing on the higher electron mobility of InP. In contrast, the SOH modulator cannot attain a 200 GHz modulation bandwidth with acceptable optical loss. Furthermore, we explore the potential for further enhancing the modulation bandwidth of the IOH modulator by shortening its length, making the IOH modulator a promising candidate for future ultra-high-speed optical modulation.

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Section: Rf Transmission Line Modelmentioning

confidence: 99%

Numerical evaluation of bandwidth and optical loss in InP-organic hybrid optical modulator with doping optimization

Sakumoto,

Nakayama,

Miyatake

et al. 2024

Jpn. J. Appl. Phys.

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“…in each arm can then be obtained from an integral of the modulation voltage seen by the optical signal along the phase shifter length  , see ref. [39], Eq. (2).…”

Section: Device Principle and Model Based On Distributed-element Equi...mentioning

confidence: 99%

Verified equivalent-circuit model for slot-waveguide modulators

Zwickel¹,

Wuensch²,

Kieninger³

et al. 2020

Opt. Express

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We formulate and experimentally validate an equivalent-circuit model based on distributed elements to describe the electric and electro-optic (EO) properties of travellingwave silicon-organic hybrid (SOH) slot-waveguide modulators. The model allows to reliably predict the small-signal EO frequency response of the modulators exploiting purely electrical measurements of the frequency-dependent RF transmission characteristics. We experimentally verify the validity of our model, and we formulate design guidelines for an optimum trade-off between optical loss due to free-carrier absorption (FCA), electro-optic bandwidth, and π-voltage of SOH slot-waveguide modulators.

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“…In practice the RC time constant for the electrode limits the speed of the device well before this point [SO], but this illustrates the fundamental transit-time limitation of a simple device. To overcome these limitations on speed, travelling-wave electrode geometries have been developed [51]. As shown in figure 9, it can now be seen that the electrode is in fact a small transmission line allowing an applied voltage at one end to travel down the line at a velocity of V,,, and be absorbed by a matching impedance at the far end.…”

Section: Electrode Fabricationmentioning

confidence: 99%

Candidate materials and technologies for integrated optics: fast and efficient electro-optic modulation

Donaldson¹

1991

J. Phys. D: Appl. Phys.

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This review discusses the linear electro-optic effect and how it is used in the fabrication of light modulators in a variety of different material systems. Lithium niobate is chosen as the foremost example of a suitable material since it currently forms the base for the most mature technology, although newer research on semiconductors and electro-optic polymers is also addressed. The fundamentals of modulator design which lead to the possibility of fast and efficient modulation are covered, as are some of the problems that are typically encountered during the realization of working devices.

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Design Of Efficient And Wideband Travelling-Wave Modulators

Abstract: Phase -matching methods for improving the bandwidth of travelling -wave optical modulators are compared with the aid of an accurate model, the validity of which is confirmed by experiment.

Cited by 12 publications

References 0 publications

Numerical evaluation of bandwidth and optical loss in InP-organic hybrid optical modulator with doping optimization

Numerical evaluation of bandwidth and optical loss in InP-organic hybrid optical modulator with doping optimization

Verified equivalent-circuit model for slot-waveguide modulators

Candidate materials and technologies for integrated optics: fast and efficient electro-optic modulation

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