Ultracompact polarization diversity components for future large-scale photonic integrated circuits on silicon

2013 ◽  
Author(s):  
Daoxin Dai
Keyword(s):  
Integrated Circuits ◽  
Large Scale ◽  
Photonic Integrated Circuits ◽  
Polarization Diversity

scholarly journals Long Low-Loss-Litium Niobate on Insulator Waveguides with Sub-Nanometer Surface Roughness

Nanomaterials ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 910 ◽  
Author(s):  
Rongbo Wu ◽  
Min Wang ◽  
Jian Xu ◽  
Jia Qi ◽  
Wei Chu ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Integrated Circuits ◽  
Large Scale ◽  
Photonic Integrated Circuits ◽  
Surface Patterning ◽  
Propagation Loss ◽  
Direct Writing ◽  
Laser Direct Writing ◽  
Low Loss ◽  
Atomic Force

In this paper, we develop a technique for realizing multi-centimeter-long lithium niobate on insulator (LNOI) waveguides with a propagation loss as low as 0.027 dB/cm. Our technique relies on patterning a chromium thin film coated on the top surface of LNOI into a hard mask with a femtosecond laser followed by chemo-mechanical polishing for structuring the LNOI into the waveguides. The surface roughness on the waveguides was determined with an atomic force microscope to be 0.452 nm. The approach is compatible with other surface patterning technologies, such as optical and electron beam lithographies or laser direct writing, enabling high-throughput manufacturing of large-scale LNOI-based photonic integrated circuits.

Large-Scale Photonic Integrated Circuits

2007 ◽  
Author(s):  
Radhakrishnan Nagarajan ◽  
Masaki Kato ◽  
Jacco Pleumeekers ◽  
Peter Evans ◽  
Sheila Hurtt ◽  
...  
Keyword(s):  
Integrated Circuits ◽  
Large Scale ◽  
Photonic Integrated Circuits

scholarly journals High-speed programmable photonic circuits in a cryogenically compatible, visible–near-infrared 200 mm CMOS architecture

2021 ◽  
Author(s):  
Mark Dong ◽  
Genevieve Clark ◽  
Andrew J. Leenheer ◽  
Matthew Zimmermann ◽  
Daniel Dominguez ◽  
...  
Keyword(s):  
Integrated Circuits ◽  
Power Consumption ◽  
High Speed ◽  
Large Scale ◽  
Near Infrared ◽  
Response Times ◽  
Photonic Integrated Circuits ◽  
Complementary Metal Oxide Semiconductor ◽  
Phase Shifters ◽  
Oxide Semiconductor

AbstractRecent advances in photonic integrated circuits have enabled a new generation of programmable Mach–Zehnder meshes (MZMs) realized by using cascaded Mach–Zehnder interferometers capable of universal linear-optical transformations on N input/output optical modes. MZMs serve critical functions in photonic quantum information processing, quantum-enhanced sensor networks, machine learning and other applications. However, MZM implementations reported to date rely on thermo-optic phase shifters, which limit applications due to slow response times and high power consumption. Here we introduce a large-scale MZM platform made in a 200 mm complementary metal–oxide–semiconductor foundry, which uses aluminium nitride piezo-optomechanical actuators coupled to silicon nitride waveguides, enabling low-loss propagation with phase modulation at greater than 100 MHz in the visible–near-infrared wavelengths. Moreover, the vanishingly low hold-power consumption of the piezo-actuators enables these photonic integrated circuits to operate at cryogenic temperatures, paving the way for a fully integrated device architecture for a range of quantum applications.

Propagation of Fundamental Mode in Regularly Bending Multi-Mode Waveguides

2021 ◽  
Author(s):  
Hongyan Yu ◽  
Xinyu Sun ◽  
Dasai Ban ◽  
Feng Qiu
Keyword(s):  
Integrated Circuits ◽  
Fundamental Mode ◽  
Large Scale ◽  
Photonic Integrated Circuits ◽  
Optical Field ◽  
Low Loss ◽  
Scattering Loss ◽  
Bending Radius ◽  
Silicon Based ◽  
Multi Mode

Abstract Transmission of the fundamental mode in multi-mode waveguides is an effective scheme for a silicon-based platform to reduce scattering loss. However, the application of the scheme is usually limited to straight waveguides and restricted in multi-mode bending waveguides. This is because the fundamental mode of a straight waveguide is seriously disordered after passing the bend. In this work, we have presented a “matched bending radius” approach, by which an ultra-low loss and negligible modal disorder have been demonstrated in the Si and Si3N4 multi-mode waveguides. The estimated optical field overlap factor is almost 0 dB at the matched bending radius, indicating that the fundamental mode can be re-generated after passing the multi-mode bending waveguide. The proposed approach will contribute to applying the low loss scheme in large-scale photonic integrated circuits.

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