Silicon Mach–Zehnder interferometer optical isolator having 8 nm bandwidth for over 20 dB isolation

Shoji, Yuya; Shirato, Yushi; Mizumoto, Tetsuya

doi:10.7567/jjap.53.022202

Cited by 62 publications

(29 citation statements)

References 14 publications

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“…4,11,39 The significant improvement of our device performance compared to that of our earlier results is mainly attributed to reduced garnet material loss, and we anticipate that material processing improvement will further enhance the MO characteristics of deposited Ce:YIG films.…”

supporting

confidence: 56%

Single-Step Deposition of Cerium-Substituted Yttrium Iron Garnet for Monolithic On-Chip Optical Isolation

et al. 2015

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Photonic integrated circuits require magneto-optical (MO) materials for making nonreciprocal devices such as isolators and circulators. The most successful MO materials are rare-earth-substituted iron garnets, but these can be challenging to grow on silicon without a seed layer, which introduces spacing loss between the waveguide and the MO cladding. A pulsed-laser deposition (PLD) method is used for making MO Ce:YIG (Ce 1 Y 2 Fe 5 O 12 )/YIG (Y 3 Fe 5 O 12 ) bilayer or trilayer films on different substrates, including silicon, quartz, and Gd 3 Ga 5 O 12 (GGG), in which a multilayer film is deposited in one run and then annealed. A YIG seed layer grown above the MO Ce:YIG facilitates recrystallization during ex situ rapid thermal annealing, which results in a reduced thermal budget and simplified deposition process. A monolithically integrated optical isolator was demonstrated by direct deposition of a bilayer Ce:YIG/YIG capping layer onto a siliconon-insulator resonator. The device exhibited an insertion loss of 7.4 ± 1.8 dB and an isolation ratio of 13.0 ± 2.2 dB within the telecommunication window (λ = 1564.4 nm), which outperforms previously reported monolithic isolators.

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supporting

confidence: 56%

Single-Step Deposition of Cerium-Substituted Yttrium Iron Garnet for Monolithic On-Chip Optical Isolation

et al. 2015

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“…1c is demonstrated. It consists of three quantum-dot lasers in a hybrid integration scheme, in which wideband silicon-on-insulator chirped grating filters60 and integrated optical isolators based on first-order magneto-optical effects61 can be employed in order to allow full functionality. In detail, if a strong excitation signal is injected to the system’s input, then the first neuron is triggered to a firing activity (ground state pulses).…”

Section: Resultsmentioning

confidence: 99%

Artificial Neuron Based on Integrated Semiconductor Quantum Dot Mode-Locked Lasers

Mesaritakis

Kapsalis

Bogris

et al. 2016

Sci Rep

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Neuro-inspired implementations have attracted strong interest as a power efficient and robust alternative to the digital model of computation with a broad range of applications. Especially, neuro-mimetic systems able to produce and process spike-encoding schemes can offer merits like high noise-resiliency and increased computational efficiency. Towards this direction, integrated photonics can be an auspicious platform due to its multi-GHz bandwidth, its high wall-plug efficiency and the strong similarity of its dynamics under excitation with biological spiking neurons. Here, we propose an integrated all-optical neuron based on an InAs/InGaAs semiconductor quantum-dot passively mode-locked laser. The multi-band emission capabilities of these lasers allows, through waveband switching, the emulation of the excitation and inhibition modes of operation. Frequency-response effects, similar to biological neural circuits, are observed just as in a typical two-section excitable laser. The demonstrated optical building block can pave the way for high-speed photonic integrated systems able to address tasks ranging from pattern recognition to cognitive spectrum management and multi-sensory data processing.

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“…We have developed an optical isolator composed of a silicon-on-insulator (SOI) based photonic waveguide with a magnetooptic garnet upper cladding layer integrated using a surface activated direct bonding technique 1,2 . The transmittance of the Mach-Zehnder interferometer (MZI) based isolator exhibits quasi-sinusoidal wavelength dependence.…”

Section: Introductionmentioning

confidence: 99%

Demonstration of an athermal waveguide optical isolator on silicon platform

Furuya

Kato

Shoji

et al. 2015

2015 European Conference on Optical Communication (ECOC)

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Silicon Mach–Zehnder interferometer optical isolator having 8 nm bandwidth for over 20 dB isolation

Cited by 62 publications

References 14 publications

Single-Step Deposition of Cerium-Substituted Yttrium Iron Garnet for Monolithic On-Chip Optical Isolation

Single-Step Deposition of Cerium-Substituted Yttrium Iron Garnet for Monolithic On-Chip Optical Isolation

Artificial Neuron Based on Integrated Semiconductor Quantum Dot Mode-Locked Lasers

Demonstration of an athermal waveguide optical isolator on silicon platform

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