scholarly journals Silicon Integrated Nanophotonic Devices for On-Chip Multi-Mode Interconnects

2020 ◽  
Vol 10 (18) ◽  
pp. 6365
Author(s):  
Hongnan Xu ◽  
Daoxin Dai ◽  
Yaocheng Shi
Keyword(s):  
Large Scale ◽  
Silicon On Insulator ◽  
Nanophotonic Devices ◽  
Mode Division Multiplexing ◽  
Higher Order Modes ◽  
Index Contrast ◽  
High Index Contrast ◽  
On Chip ◽  
Multi Mode ◽  
Development Prospects

Mode-division multiplexing (MDM) technology has drawn tremendous attention for its ability to expand the link capacity within a single-wavelength carrier, paving the way for large-scale on-chip data communications. In the MDM system, the signals are carried by a series of higher-order modes in a multi-mode bus waveguide. Hence, it is essential to develop on-chip mode-handling devices. Silicon-on-insulator (SOI) has been considered as a promising platform to realize MDM since it provides an ultra-high-index contrast and mature fabrication processes. In this paper, we review the recent progresses on silicon integrated nanophotonic devices for MDM applications. We firstly discuss the working principles and device configurations of mode (de)multiplexers. In the second section, we summarize the multi-mode routing devices, including multi-mode bends, multi-mode crossings and multi-mode splitters. The inverse-designed multi-mode devices are then discussed in the third section. We also provide a discussion about the emerging reconfigurable MDM devices in the fourth section. Finally, we offer our outlook of the development prospects for on-chip multi-mode photonics.

Multimode T-junctions based on truncated Eaton lens

Frequenz ◽  
2020 ◽  
Vol 74 (7-8) ◽  
pp. 271-276
Author(s):  
Seyed Hadi Badri ◽  
Mohsen Mohammadzadeh Gilarlue
Keyword(s):  
Optical Interconnects ◽  
Three Dimensional ◽  
Emerging Technology ◽  
Higher Order ◽  
Silicon On Insulator ◽  
Transmitted Power ◽  
Mode Division Multiplexing ◽  
Higher Order Modes ◽  
On Chip ◽  
Three Dimensional Simulations

AbstractMode-division multiplexing (MDM) in silicon-on-insulator platform is an emerging technology to increase the channel number of a single wavelength carrier by the number of modes and consequently increase the transmission capacity of on-chip optical interconnects. We propose and theoretically demonstrate a multimode branching structure based on the truncated Eaton lens. The proposed T-junctions efficiently convert the higher-order modes into fundamental modes; therefore, they can be potentially employed to manipulate modes in MDM systems. The designed T-junctions are implemented by varying the guiding layer’s thickness on a silicon-on-insulator platform. The three-dimensional simulations verify that the proposed structures can split the TE2 (TE1) mode into the fundamental modes with an average transmitted power of 32% (47%) in a 1550–1600 nm bandwidth.

scholarly journals On-chip scalable mode-selective converter based on asymmetrical micro-racetrack resonators

Nanophotonics ◽  
2020 ◽  
Vol 9 (6) ◽  
pp. 1447-1455
Author(s):  
Huifu Xiao ◽  
Zhenfu Zhang ◽  
Junbo Yang ◽  
Xu Han ◽  
Wenping Chen ◽  
...  
Keyword(s):  
Large Scale ◽  
Optical Network ◽  
Monochromatic Light ◽  
Network On Chip ◽  
Silicon On Insulator ◽  
Intelligent Network ◽  
Silicon Waveguides ◽  
Mode Division Multiplexing ◽  
Potential Applications ◽  
On Chip

AbstractMode division multiplexing (MDM) technology has been well known to researchers for its ability to increase the link capacity of photonic network. While various mode processing devices were demonstrated in recent years, the reconfigurability of multi-mode processing devices, which is vital for large-scale multi-functional networks, is rarely developed. In this paper, we first propose and experimentally demonstrate a scalable mode-selective converter using asymmetrical micro-racetrack resonators (MRRs) for optical network-on-chip. The proposed device, composed of cascaded MRRs, is able to convert the input monochromatic light to an arbitrary supported mode in the output waveguide as required. Thermo-optical effect of silicon waveguides is adopted to tune the working states of the device. To test the utility, a device for proof-of-concept is fabricated and experimentally demonstrated based on silicon-on-insulator substrate. The measured spectra of the device show that the extinction ratios of MRRs are larger than 18 dB, and modal crosstalk for selected modes are all less than −16.5 dB. The switching time of the fabricated device is in the level of about 40 μs. The proposed device is believed to have potential applications in multi-functional and intelligent network-on-chip, especially in reconfigurable MDM networks.

High Index-Contrast Silicon-On-Insulator Nanophotonics

2006 ◽  
Author(s):  
P. Bienstman ◽  
F. Laere ◽  
D. Taillaert ◽  
P. Dumon ◽  
W. Bogaerts ◽  
...  
Keyword(s):  
High Index ◽  
Silicon On Insulator ◽  
Index Contrast ◽  
High Index Contrast

TRANSFORMATION OF DIRECTIONAL COUPLERS TO MULTI-MODE INTERFEROMETERS BASED ON RIDGE WAVEGUIDES AND ITS APPLICATIONS

2005 ◽  
Vol 14 (02) ◽  
pp. 221-235 ◽  
Author(s):  
S. DARMAWAN ◽  
S. Y. LEE ◽  
C. W. LEE ◽  
M. K. CHIN
Keyword(s):  
Design Parameters ◽  
Large Set ◽  
Directional Couplers ◽  
Design Variables ◽  
Ridge Waveguides ◽  
Polarization Insensitive ◽  
Index Contrast ◽  
High Index Contrast ◽  
Coupling Characteristic ◽  
Multi Mode

We present a comparison of directional couplers and multi-mode interferometers based on the unique properties of high-index contrast ridge waveguides. The two devices are intimately related as the MMI is structurally derived from the DC. For the first time, the continuous evolution from the two-mode coupling characteristic of DC to the multi-mode mixing and interference characteristic of MMI is shown. We show that practical directional couplers with reasonable gap size can also be quite compact and have the same coupling length for both TE and TM polarizations. Consequently, the DC can be just as polarization insensitive as the MMI. These features, however, require careful design control involving a large set of design parameters. On top of that, we also show a novel design of polarization splitter based on both DC and MMI. By comparison, the MMI design is more robust and involves fewer design variables.

scholarly journals KLu(WO4)2/SiO2 Tapered Waveguide Platform for Sensing Applications

Micromachines ◽  
2019 ◽  
Vol 10 (7) ◽  
pp. 454 ◽  
Author(s):  
Medina ◽  
Rüter ◽  
Pujol ◽  
Kip ◽  
Masons ◽  
...  
Keyword(s):  
Inductively Coupled Plasma ◽  
Proof Of Concept ◽  
Inductively Coupled ◽  
Sensing Applications ◽  
Tapered Waveguide ◽  
Processing Step ◽  
Index Contrast ◽  
High Index Contrast ◽  
On Chip ◽  
Tapered Waveguides

This paper provides a generic way to fabricate a high-index contrast tapered waveguide platform based on dielectric crystal bonded on glass for sensing applications. As a specific example, KLu(WO4)2 crystal on a glass platform is made by means of a three-technique combination. The methodology used is on-chip bonding, taper cutting with an ultra-precise dicing saw machine and inductively coupled plasma-reactive ion etching (ICP-RIE) as a post-processing step. The high quality tapered waveguides obtained show low surface roughness (25 nm at the top of the taper region), exhibiting propagation losses estimated to be about 3 dB/cm at 3.5 m wavelength. A proof-of-concept with crystal-on-glass tapered waveguides was realized and used for chemical sensing.

PROGRESS ON THE FABRICATION OF ON-CHIP, INTEGRATED CHALCOGENIDE GLASS (CHG)-BASED SENSORS

2010 ◽  
Vol 19 (01) ◽  
pp. 75-99 ◽  
Author(s):  
K. RICHARDSON ◽  
L. PETIT ◽  
N. CARLIE ◽  
B. ZDYRKO ◽  
I. LUZINOV ◽  
...  
Keyword(s):  
Chalcogenide Glasses ◽  
Refractive Index Change ◽  
Structural Evolution ◽  
Molecular Sensors ◽  
Molecular Binding ◽  
Disk Resonators ◽  
Biochemical Sensing ◽  
Index Contrast ◽  
High Index Contrast ◽  
On Chip

In this paper, we review ongoing progress in the development of novel on-chip, low loss planar molecular sensors that address the emerging need in the field of biochemical sensing. Chalcogenide glasses were identified as the material of choice for sensing due to their wide infrared transparency window. We report the details of manufacturing processes used to realize novel high-index-contrast, compact micro-disk resonators. Our findings demonstrate that our device can operate in dual modalities, for detection of the infrared optical absorption of a binding event using cavity enhanced spectroscopy, or sensing refractive index change due to surface molecular binding and extracting micro-structural evolution information via cavity enhanced refractometry.

Silicon-based Integrated Optics: Waveguide Technology to Microphotonics

2004 ◽  
Vol 832 ◽  
Author(s):  
Siegfried Janz ◽  
Alexei Bogdanov ◽  
Pavel Cheben ◽  
André Delâge ◽  
Boris Lamontagne ◽  
...  
Keyword(s):  
Silicon On Insulator ◽  
Massively Parallel ◽  
Polarization Sensitivity ◽  
Waveguide Loss ◽  
Waveguide Devices ◽  
Parallel Data ◽  
Index Contrast ◽  
Waveguide Coupling ◽  
High Index Contrast ◽  
Silicon Based

ABSTRACTUsing a waveguide spectrometer chip as an example, we describe how high index contrast waveguides systems such as silicon-on-insulator can be combined with microphotonic design rules to extend the performance of waveguide devices. The challenges arising in the implementation of silicon microphotonic technology are discussed, and recent work addressing the issues of waveguide coupling, polarization sensitivity, waveguide loss and massively parallel data acquisition is reviewed.

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