Design challenges of next generation coherent systems using Silicon photonics high-speed modulator

2014 ◽  
Author(s):  
Biljana Milivojevic ◽  
James Whiteaway ◽  
Stefan Wiese ◽  
Christian Raabe ◽  
Anujit Shastri ◽  
...  
Keyword(s):  
Silicon Photonics ◽  
High Speed ◽  
Next Generation ◽  
Coherent Systems ◽  
Design Challenges

scholarly journals Heterogeneously-Integrated Optical Phase Shifters for Next-Generation Modulators and Switches on a Silicon Photonics Platform: A Review

Micromachines ◽  
2021 ◽  
Vol 12 (6) ◽  
pp. 625
Author(s):  
Younghyun Kim ◽  
Jae-Hoon Han ◽  
Daehwan Ahn ◽  
Sanghyeon Kim
Keyword(s):  
Silicon Photonics ◽  
High Speed ◽  
High Performance ◽  
Phase Shifter ◽  
Phase Shifters ◽  
Next Generation ◽  
Optical Modulators ◽  
Optical Phase ◽  
High Modulation ◽  
Integrated Optical

The realization of a silicon optical phase shifter marked a cornerstone for the development of silicon photonics, and it is expected that optical interconnects based on the technology relax the explosive datacom growth in data centers. High-performance silicon optical modulators and switches, integrated into a chip, play a very important role in optical transceivers, encoding electrical signals onto the light at high speed and routing the optical signals, respectively. The development of the devices is continuously required to meet the ever-increasing data traffic at higher performance and lower cost. Therefore, heterogeneous integration is one of the highly promising approaches, expected to enable high modulation efficiency, low loss, low power consumption, small device footprint, etc. Therefore, we review heterogeneously integrated optical modulators and switches for the next-generation silicon photonic platform.

Design Concepts for the Next Generation of High-Speed Diesel-Electric Locomotives

2014 ◽  
Author(s):  
John Tunna ◽  
Jingjun Zhang ◽  
Adrian Gorski
Keyword(s):  
High Speed ◽  
Next Generation ◽  
Design Concepts ◽  
Passenger Rail ◽  
High Speed Diesel ◽  
Unsprung Mass

The Passenger Rail Investment and Improvement Act (PRIIA) Section 305 Next Generation Equipment Committee’s specification for diesel-electric locomotives has several challenging requirements. Among these is limiting P2 Force to 82,000 pound force (lbf) at 125 miles per hour (mph). To achieve this, the locomotive designer would have to balance unsprung mass and axle load. A design envelope exists within which that balance can be achieved. Advanced designs of traction and braking systems are required, and attention has to be paid to minimizing the overall mass of the locomotive.

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