Efficient, compact and low loss thermo-optic phase shifter in silicon

Harris, Nicholas C.; Ma, Yangjin; Mower, Jacob; Baehr‐Jones, Tom; Englund, Dirk; Hochberg, Michael; Galland, Christophe

doi:10.1364/oe.22.010487

Cited by 307 publications

(190 citation statements)

References 24 publications

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“…Overall, the obtained results outperform the performance of MZI switches based also on the placement the heaters on top of the cladding layer [6,9,12]. The best obtained figure of merit is also comparable to thermo-optic MZI switches based on doping the silicon to directly build the heaters into the waveguide (P π ·τ≈67 mW·µs in [11]). By means of this approach, the efficiency of the thermal process is maximized and a figure of merit as low as 30.5 mW·µs has been recently demonstrated [10].…”

Section: Resultsmentioning

confidence: 63%

“…Furthermore, an additional tuning mechanism, which will increase the total power consumption, is also necessary to counteract possible fabrication deviations [5]. On the other hand, silicon MZI switches have a wider optical bandwidth and higher robustness but usually suffer from a larger footprint and higher power consumption that limits the scalability to build switching fabrics with a large number of ports [6][7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

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High performace silicon 2x2 optical switch based on a thermo-optically tunable multimode interference coupler and efficient electrodes

Rosa¹,

Gutiérrez²,

Brimont³

et al. 2016

Opt. Express

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2 is proposed and demonstrated. The MMI structure has been optimized using a silica trench acting as a thermal isolator without introducing any substantial loss penalty or crosstalk degradation. Furthermore, the electrodes performance have significantly been improved via engineering the heater geometry and using two metallization steps. Thereby, a drastic power consumption reduction of around 90% has been demonstrated yielding to values as low as 24.9 mW. Furthermore, very fast switching times of only 1.19 µs have also been achieved.

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Section: Resultsmentioning

confidence: 63%

Section: Introductionmentioning

confidence: 99%

High performace silicon 2x2 optical switch based on a thermo-optically tunable multimode interference coupler and efficient electrodes

Rosa¹,

Gutiérrez²,

Brimont³

et al. 2016

Opt. Express

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show abstract

“…The majority of on-chip loss is attributed to a waveguide propagation loss of 2.4 dB/cm [52]. Each RBS unit cell, shown in 3B and C, contains four thermo-optic phase shifters [63] and two 50:50 splitting ratio directional couplers. The QPP phases can be programmed on microsecond timescales [63].…”

Section: Large-scale Linear Optical Circuitsmentioning

confidence: 99%

Large-scale quantum photonic circuits in silicon

et al. 2016

Self Cite

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Quantum information science offers inherently more powerful methods for communication, computation, and precision measurement that take advantage of quantum superposition and entanglement. In recent years, theoretical and experimental advances in quantum computing and simulation with photons have spurred great interest in developing large photonic entangled states that challenge today's classical computers. As experiments have increased in complexity, there has been an increasing need to transition bulk optics experiments to integrated photonics platforms to control more spatial modes with higher fidelity and phase stability. The silicon-on-insulator (SOI) nanophotonics platform offers new possibilities for quantum optics, including the integration of bright, nonclassical light sources, based on the large third-order nonlinearity (χ (3) ) of silicon, alongside quantum state manipulation circuits with thousands of optical elements, all on a single phase-stable chip. How large do these photonic systems need to be? Recent theoretical work on Boson Sampling suggests that even the problem of sampling from ~30 identical photons, having passed through an interferometer of hundreds of modes, becomes challenging for classical computers. While experiments of this size are still challenging, the SOI platform has the required component density to enable low-loss and programmable interferometers for manipulating hundreds of spatial modes.Here, we discuss the SOI nanophotonics platform for quantum photonic circuits with hundreds-to-thousands of optical elements and the associated challenges. We compare SOI to competing technologies in terms of requirements for quantum optical systems. We review recent results on large-scale quantum state evolution circuits and strategies for realizing high-fidelity heralded gates with imperfect, practical systems. Next, we review recent results on silicon photonics-based photonpair sources and device architectures, and we discuss a path towards large-scale source integration. Finally, we review monolithic integration strategies for single-photon detectors and their essential role in on-chip feed forward operations.

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“…Although silicon ring resonators and in some cases Fabry-Perot (FP) resonators [23], can have high finesse they either require complex structures and metal depositions in highly defined manner or cannot be fabricated in in-fiber applications such as in-fiber modulators since they have to be implemented as part of an SOI chip [24][25][26][27][28]. Even though ring resonators can be made in e.g.…”

Section: Introductionmentioning

confidence: 99%

Design of fiber-integrated tunable thermo-optic C-band filter based on coated silicon slab

Pinhas

Malka

Danan

et al. 2017

J. Eur. Opt. Soc.-Rapid Publ.

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Background: Optical filters are required to have narrow band-pass filtering in the spectral C-band for applications such as signal tracking, sub-band filtering or noise suppression. These requirements lead to a variety of filters that offer thermo-optic effect for optical switching, however, some of which without proper thermal and optical efficiency. Methods: In this paper we propose a tunable thermo-optic filtering device based on a coated silicon slab resonator with an increased Q-factor to allow for an efficient thermo-optical switching in the C-band. The device can be designed either for long range wavelength tuning or for short range with increased wavelength resolution. Results: Theoretical examination of the thermal parameters affecting the filtering process is shown together with experimental results. Proper channel isolation with an extinction ratio of 20 dB is achieved with a spectral bandpass width of 0.07 nm. Conclusions: This Si slab based filter characteristics make it suitable for wavelength switching systems such as dense wavelength division multiplexing. In addition, the filter is fiber integrated in order for it to be more compatible with other optics communication devices.

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Efficient, compact and low loss thermo-optic phase shifter in silicon

Cited by 307 publications

References 24 publications

High performace silicon 2x2 optical switch based on a thermo-optically tunable multimode interference coupler and efficient electrodes

High performace silicon 2x2 optical switch based on a thermo-optically tunable multimode interference coupler and efficient electrodes

Large-scale quantum photonic circuits in silicon

Design of fiber-integrated tunable thermo-optic C-band filter based on coated silicon slab

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