Compact multimode interference couplers with arbitrary power splitting ratio

Feng, David Jui-Yang; Lay, T. S.

doi:10.1364/oe.16.007175

Cited by 20 publications

(11 citation statements)

References 14 publications

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“…In this way an MMI immediately provides the ability to interact any subset of an N -photon input state -providing a platform to efficiently create multipartite entangled states with a suitably designed unitary operation. MMIs have already been designed to serve a number of purposes such as demultiplexers [23,24], power splitters [25], optical attenuators [26] and optical switches [27,28]. By demonstrating pairwise entanglement operations using an MMI and cavity-photons we show the ability of these integrated circuits to mediate the entanglement operations required for the generation of distributed multipartite entangled states in a real-world environment.…”

Section: Introductionmentioning

confidence: 98%

Multimode interferometry for entangling atoms in quantum networks

Barrett

Rubenok

Stuart

et al. 2019

Quantum Sci. Technol.

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We bring together a cavity-enhanced light-matter interface with a multimode interferometer (MMI) integrated onto a photonic chip and demonstrate the potential of such hybrid systems to tailor distributed entanglement in a quantum network. The MMI is operated with pairs of narrowband photons produced a priori deterministically from a single 87 Rb atom strongly coupled to a high-finesse optical cavity. Non-classical coincidences between photon detection events show no loss of coherence when interfering pairs of these photons through the MMI in comparison to the two-photon visibility directly measured using Hong-Ou-Mandel interference on a beam splitter. This demonstrates the ability of integrated multimode circuits to mediate the entanglement of remote stationary nodes in a quantum network interlinked by photonic qubits. * now at: Bosch Car Multimedia Portugal S.A.,

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Section: Introductionmentioning

confidence: 98%

Multimode interferometry for entangling atoms in quantum networks

Barrett

Rubenok

Stuart

et al. 2019

Quantum Sci. Technol.

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“…Similarly, by cascading two 2 × 2 MMI sections, four different fixed splitting ratios (0.07, 0.64, 0.80, and 0.93) can be achieved [36]. In order to realize freely chosen power splitting ratio, several CMMIs with different phase shifters have been reported, in which phase shifters can be implemented based on the TO effect, connecting waveguides with unequal width/height/length or two taper waveguides between two MMI sections [37][38][39][40]. Nevertheless, the above reported asymmetrical splitters have a limited number of output ports of ≤ 3 (1 × 2, 2 × 2, or 1 × 3).…”

Section: Introductionmentioning

confidence: 99%

Design of Power-Splitter With Selectable Splitting-Ratio Using Angled and Cascaded MMI-Coupler

Jiang

Rahman

2018

IEEE J. Quantum Electron.

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A concept of power splitter with selectable splittingratios is proposed based on two multimode interference (MMI) sections connected by a phase-shifting region, in which phasematching conditions can be fulfilled by using a simple angled section or alternatively using matched phase-shifters. The design example of an asymmetrical splitter (10 : 90) is optimized by using the transfer matrix method and three-dimensional full-vectorial beam propagation method. The numerical results reveal that a simple 1.2° angled section can yield a 10 : 90 splitter with an insertion loss of 0.74 dB and a total length of 192 μm. It is also shown that, for the cascaded MMI couplers based splitter, a more compact length of 58 μm with a lower insertion loss of 0.41 dB can be achieved. The fabrication tolerances are also investigated for the proposed asymmetrical power splitter.

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“…Traditionally, multimode waveguides can only have limited split ratios at specific lengths. Geometrical variations are required to obtain a free choice of split ratios [13][14][15]. In the past, we have presented a matrix analysis based on the coupled-mode theory [16] to show that arbitrary unitary transformations can be generated with computer-genearted planar holograms (CGPHs) on multimode waveguides [17].…”

Section: Introductionmentioning

confidence: 99%

Diffraction engineering of multimode waveguides using computer-generated planar holograms

Tseng

2009

Opt. Express

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The self-imaging property in multimode waveguides is related to the waveguide widths and lengths. By engineering the diffraction properties of multimode waveguides, we propose a scheme to design devices with reduced self-imaging lengths at a fixed width. Using computer-generated planar holograms, the coupling coefficients between the guided modes are adjusted to generate the desired diffraction properties. Calculations based on the coupled-mode theory are presented. Devices are designed based on a silicon-on-insulator (SOI) platform. Beam propagation simulations are used to verify the coupled-mode theory analysis.

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Compact multimode interference couplers with arbitrary power splitting ratio

Cited by 20 publications

References 14 publications

Multimode interferometry for entangling atoms in quantum networks

Multimode interferometry for entangling atoms in quantum networks

Design of Power-Splitter With Selectable Splitting-Ratio Using Angled and Cascaded MMI-Coupler

Diffraction engineering of multimode waveguides using computer-generated planar holograms

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