Integrated dual-mode waveguide interferometer

Hoppe, Niklas; Föhn, Thomas; Rosa, María Félix; Vogel, Wolfgang; Zaoui, Wissem Sfar; Kaschel, Mathias; Butschke, Jörg; Letzkus, Florian; Berroth, Manfred

doi:10.1109/nusod.2015.7292869

Cited by 3 publications

(5 citation statements)

References 5 publications

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“…E.g. for a 15 µm wide Si grating coupler it is around 3 dB following the simulations in Hoppe et al (2015). The extinction ratio of the presented prototype modulator is around 8 dB (see Fig.…”

Section: Device Functionalitymentioning

confidence: 54%

“…1b, by lateral shifted waveguides (Liu et al, 2014), by waveguide steps (Zinoviev et al, 2011), by waveguide gratings (Bruck and Hainberger, 2014) or even simpler by a lateral shift of the external fibers with respect to the center of the grating couplers. Using the last approach, at a special fiber position, the first and second order modes are excited in the following dual-mode waveguide with the same power resulting in a balanced excitation (Hoppe et al, 2015). However, imbalanced excitation can also be beneficial if the two modes suffer from different losses because it can increase the extinction ratio (Hoppe et al, 2017a).…”

Section: Device Principlementioning

confidence: 99%

“…The principle in Hoppe et al (2015) is used to excite the two lowest order transverse electric (TE) modes in a dualmode waveguide for building a prototype modulator. Hereby, two lateral displaced single mode fibers (SMF 28) linear input and output grating couplers (see Fig.…”

Section: Prototype Realizationmentioning

confidence: 99%

“…in Hoppe et al (2015). If the length L is known and the FSR is estimated at a center wavelength λ 0 with the help of two minima in the transmission spectrum, the amplitude of n g can be calculated.…”

Section: Characterization Of the Waveguide Channelmentioning

confidence: 99%

“…The coupling efficiency of the grating couplers can be enhanced by an aperiodic grating design with back side reflector in the used technology to −0.62 dB (Sfar Zaoui et al, 2014). To achieve a balanced excitation of the two TE modes, an additional lateral fiber offset with respect to the center of the grating coupler is necessary (Hoppe et al, 2015). This can cause an additional loss, which is dependent on the grating coupler width.…”

Section: Device Functionalitymentioning

confidence: 99%

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Single waveguide silicon-organic hybrid modulator

et al. 2017

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Abstract. We present a novel silicon-organic hybrid modulator based on an integrated dual-mode interferometer. The modulator offers a compact, simplified design and enhanced robustness to on-chip fluctuations of temperature compared to conventional Mach-Zehnder based systems. A prototype modulator showing a voltage dependent transmission spectrum is obtained by cladding a dual-mode waveguide in a 250 nm silicon-on-insulator technology with a customized organic electro-optic layer. Estimated phase shifts and corresponding figures of merit are discussed in this contribution. The used organic layer is based on the guest-host approach with customized donor-π -acceptor chromophore embedded and poled in a poly(methylmethacrylate) matrix. The presented prototype is to the best of the authors' knowledge the first integrated single waveguide silicon-organic hybrid modulator.

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Section: Device Functionalitymentioning

confidence: 54%

Section: Device Principlementioning

confidence: 99%

Section: Prototype Realizationmentioning

confidence: 99%

Section: Characterization Of the Waveguide Channelmentioning

confidence: 99%

Section: Device Functionalitymentioning

confidence: 99%

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Single waveguide silicon-organic hybrid modulator

et al. 2017

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Design of an Integrated Dual-Mode Interferometer on 250 nm Silicon-on-Insulator

Hoppe

Föhn

Diersing

et al. 2017

IEEE J. Select. Topics Quantum Electron.

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Silicon Integrated Dual-Mode Interferometer with Differential Outputs

et al. 2017

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The dual-mode interferometer (DMI) is an attractive alternative to Mach-Zehnder interferometers for sensor purposes, achieving sensitivities to refractive index changes close to state-of-the-art. Modern designs on silicon-on-insulator (SOI) platforms offer thermally stable and compact devices with insertion losses of less than 1 dB and high extinction ratios. Compact arrays of multiple DMIs in parallel are easy to fabricate due to the simple structure of the DMI. In this work, the principle of operation of an integrated DMI with differential outputs is presented which allows the unambiguous phase shift detection with a single wavelength measurement, rather than using a wavelength sweep and evaluating the optical output power spectrum. Fluctuating optical input power or varying attenuation due to different analyte concentrations can be compensated by observing the sum of the optical powers at the differential outputs. DMIs with two differential single-mode outputs are fabricated in a 250 nm SOI platform, and corresponding measurements are shown to explain the principle of operation in detail. A comparison of DMIs with the conventional Mach-Zehnder interferometer using the same technology concludes this work.

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Integrated dual-mode waveguide interferometer

Cited by 3 publications

References 5 publications

Single waveguide silicon-organic hybrid modulator

Single waveguide silicon-organic hybrid modulator

Design of an Integrated Dual-Mode Interferometer on 250 nm Silicon-on-Insulator

Silicon Integrated Dual-Mode Interferometer with Differential Outputs

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