Chirp-free optical modulation using a silicon push-pull coupling microring

Ye, Tong; Zhou, Yifeng; Yan, Cishuo; Li, Yuntao; Su, Yikai

doi:10.1364/ol.34.000785

Cited by 23 publications

(9 citation statements)

References 7 publications

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“…Chirp is also present in the output of typical ring resonator based optical modulators due to the non-constant phase response of the ring around its resonance at which it is operated for intensity modulation. It has been proposed that more complex structures can be used to eliminate chirp [17] and that in certain modes of operation negative chirp can be engineered to facilitate propagation over longer distances of fibre [18].…”

Section: Chirp Analysismentioning

confidence: 99%

High Performance Mach–Zehnder-Based Silicon Optical Modulators

Thomson

Gardes

Liu

et al. 2013

IEEE J. Select. Topics Quantum Electron.

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Abstract-Silicon photonics is poised to revolutionise several data communication applications. The development of high performance optical modulators formed in silicon is essential for the technology to be viable. In this paper we review our recent work on carrier depletion silicon Mach Zehnder based optical modulators which have formed part of the work within the UK Silicon Photonics and HELIOS projects, as well as including some recent new data. A concept for the self-aligned formation of the pn junction which is flexible in the capability to produce a number of device configurations is presented. This process is key in having performance repeatability, a high production yield and large extinction ratios. Experimental results from devices which are formed though such processes are presented with operation up to and beyond 40Gbit/s. The potential for silicon photonics to fulfil longer haul applications is also explored in the analysis of the chirp produced from these devices and the ability to produce large extinction ratios at high speed. It is shown that the chirp produced with the modulator operated in dual drive configuration is negligible and that a 18dB dynamic modulation depth is obtainable at a data rate of 10Gbit/s.

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Section: Chirp Analysismentioning

confidence: 99%

High Performance Mach–Zehnder-Based Silicon Optical Modulators

Thomson

Gardes

Liu

et al. 2013

IEEE J. Select. Topics Quantum Electron.

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“…33) For chirp-free modulation in the MRR modulator, an additional architecture for obtaining the push-pull symmetry must be adopted. 34) The phase shift enhancement property of the MRR-loaded MZM can be a viable solution that will enable significant reduction in driving voltage/power with the overcoupled MRR. Also, the extinction ratio can be improved by optimizing the splitting ratio of the MRR-loaded MZM.…”

Section: Modulation Bandwidth and Chirping In Mrr And Mrr-loaded Mzmmentioning

confidence: 99%

Thermo-optically driven silicon microring-resonator-loaded Mach–Zehnder modulator for low-power consumption and multiple-wavelength modulation

Gautam¹,

Kaneshige²,

Yamada³

et al. 2014

Jpn. J. Appl. Phys.

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Low-power-consumption thermo-optically controlled silicon-microring-resonator loaded Mach–Zehnder modulators (MRR-loaded MZMs) are demonstrated. We experimentally characterized a single microring and cascaded-multiple-microring resonators coupled to one arm of a Mach–Zehnder interferometer (MZI). The driving power consumption of the proposed MZM is significantly reduced owing to the enhanced phase shift in the MRR. The device was fabricated on a silicon-on-insulator (SOI) waveguide structure, and each microring is equipped with TiN microheater for thermo-optic tuning. The coupling efficiency between the microring and a busline waveguide was regulated by varying the gap between two waveguides at a directional coupler. The power consumption of single microring and cascaded MRR-loaded MZMs was approximately 0.4 and 1 mW, respectively. The phase-shift enhancement factor of up to 19 with a maximum extinction ratio of 18 dB was obtained experimentally. Multiple-wavelength operation was also demonstrated in the cascaded MRR-loaded MZM.

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“…It is well known that highly nonlinear materials have always attracted much attention in optical communications because of the urgent requirement of signal processing and logic operation in integration optoelectronics. Undoubtedly, during the last decade, semiconductor waveguides with strong nonlinear effects, such as the silicon and chalcogenide waveguide, have attracted tremendous attention [1,2], and have been considerably investigated and demonstrated to realize compactly optoelectronic devices for wavelength conversion [3,4], optical switching [5,6], modulation [7,8], and light propagation [9,10]. Compared to the significant previous reports, the passive GaAs semiconductor waveguide has stronger third order nonlinearity and 2-photon absorption coefficients [11,12] and so it can be considered another highly nonlinear medium, and has already been investigated in wavelength conversion, optical switching, and other potential applications [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Double pulse generation in a highly nonlinear GaAs optical waveguide

Wu¹

2014

Turk J Phys

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This paper presents a simulation and investigation about the nonlinear interplay between an optical pulse and GaAs waveguide. The results obtained show that the nonlinear processes including self-phase modulation, 2-photon absorption, and free carrier related effects will have significant influences on the temporal shape and frequency spectrum of a propagating pulse in the GaAs waveguide with the result that 2-photon absorption can extend the pulse duration that can be again compressed by the free carrier absorption. The outcome spectrum is also asymmetrical due to the free carrier related effects, which takes on a complicated oscillation structure resulting from the interference. In addition, an interesting phenomenon is that the input pulse will eventually evolve into a double pulse along the GaAs waveguide by means of judiciously adjusting the intensity, waveform, and time duration of the input pulse, i.e. when the time duration of the input pulse is larger than the carrier lifetime, the input pulse with high enough intensity can develop into a double pulse at the end of the waveguide.

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Chirp-free optical modulation using a silicon push-pull coupling microring

Cited by 23 publications

References 7 publications

High Performance Mach–Zehnder-Based Silicon Optical Modulators

High Performance Mach–Zehnder-Based Silicon Optical Modulators

Thermo-optically driven silicon microring-resonator-loaded Mach–Zehnder modulator for low-power consumption and multiple-wavelength modulation

Double pulse generation in a highly nonlinear GaAs optical waveguide

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