scholarly journals Three-Port Optical Phase-Shifters and Modulators With Ultra-High Modulation Efficiency, Positive RF-Linking Gain, and Low Residual Amplitude Modulation

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 80836-80841
Author(s):  
Rui Lin Chao ◽  
Zohauddin Ahmad ◽  
Jyehong Chen ◽  
Yinchieh Lai ◽  
Jin-Wei Shi
Keyword(s):  
Amplitude Modulation ◽  
Phase Shifters ◽  
Optical Phase ◽  
High Modulation ◽  
Residual Amplitude Modulation

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.

Sources of the Scalp-Recorded Amplitude-Modulation Following Response

2002 ◽  
Vol 13 (04) ◽  
pp. 188-204 ◽  
Author(s):  
Shigeyuki Kuwada ◽  
Julia S. Anderson ◽  
Ranjan Batra ◽  
Douglas C. Fitzpatrick ◽  
Natacha Teissier ◽  
...  
Keyword(s):  
Animal Model ◽  
Amplitude Modulation ◽  
Single Unit ◽  
Modulation Frequency ◽  
Multiple Sources ◽  
High Modulation ◽  
Before And After ◽  
Single Unit Recordings ◽  
Composite Response ◽  
The Brain

The scalp-recorded amplitude-modulation following response (AMFR)” is gaining recognition as an objective audiometric tool, but little is known about the neural sources that underlie this potential. We hypothesized, based on our human studies and single-unit recordings in animals, that the scalp-recorded AMFR reflects the interaction of multiple sources. We tested this hypothesis using an animal model, the unanesthetized rabbit. We compared AMFRs recorded from the surface of the brain at different locations and before and after the administration of agents likely to enhance or suppress neural generators. We also recorded AMFRs locally at several stations along the auditory neuraxis. We conclude that the surface-recorded AMFR is indeed a composite response from multiple brain generators. Although the response at any modulation frequency can reflect the activity of more than one generator, the AMFRs to low and high modulation frequencies appear to reflect a strong contribution from cortical and subcortical sources, respectively.

Residual amplitude modulation suppression to 6x10-7 in frequency modulation

2021 ◽  
Author(s):  
xinqian guo ◽  
Linbo Zhang ◽  
jun liu ◽  
long chen ◽  
le fan ◽  
...  
Keyword(s):  
Amplitude Modulation ◽  
Frequency Modulation ◽  
Residual Amplitude Modulation

scholarly journals Investigation of residual amplitude modulation in squeezed state generation system

2018 ◽  
Vol 26 (15) ◽  
pp. 18957 ◽  
Author(s):  
Zhixiu Li ◽  
Xiaocong Sun ◽  
Yajun Wang ◽  
Yaohui Zheng ◽  
Kunchi Peng
Keyword(s):  
Amplitude Modulation ◽  
Squeezed State ◽  
Generation System ◽  
State Generation ◽  
Residual Amplitude Modulation

Analysis of frequency noise in ultra-stable optical oscillators with active control of residual amplitude modulation

2014 ◽  
Vol 117 (4) ◽  
pp. 1025-1033 ◽  
Author(s):  
Liufeng Li ◽  
Hui Shen ◽  
Jin Bi ◽  
Chun Wang ◽  
Shasha Lv ◽  
...  
Keyword(s):  
Active Control ◽  
Amplitude Modulation ◽  
Frequency Noise ◽  
Residual Amplitude Modulation

scholarly journals Grating Lobe-Free Beam Steering through Optical Phase Array Using Phase-Compensated Two Index-Mismatched Silicon Wires-Based Emitters

2020 ◽  
Vol 10 (4) ◽  
pp. 1225
Author(s):  
Rong-An Zhang ◽  
Ting-Sheng Lin ◽  
Wai-Ting Liu ◽  
Shih-Hsiang Hsu ◽  
Che-Chang Chang
Keyword(s):  
Phase Shifter ◽  
Beam Steering ◽  
Thermal Control ◽  
Phase Shifters ◽  
Phase Array ◽  
Optical Phase ◽  
Grating Lobe ◽  
Half Wavelength ◽  
Beam Formation ◽  
Free Beam

The beam formation can be treated as the diffraction pattern. A 1-D light detection and ranging beam steering could be derived through a phase shifter array using Rayleigh–Sommerfeld Diffraction, which is then utilized to demonstrate grating lobe-free beam steering from the optical phase array emitter with half-wavelength pitches. The half-wavelength pitch cannot demonstrate beam formation without any evanescent coupling blocking between emitters. Here, two index-mismatched silicon wires in the emitter array are proposed by the optical phase compensation through waveguide width adjustment, to avoid the complex and addressable thermal control on the phase shifters. Moreover, the same output optical waveguide mode needs to be further considered to demonstrate the grating lobe-free beam steering. In order to get the adiabatic connection between two different pitches between the phase shifter and emitter, an optical path equalization will also be applied.

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