Multimode interference spectrometer

2004 ◽  
Author(s):  
Faramarz Farahi
Keyword(s):  
Multimode Interference ◽  
Interference Spectrometer

scholarly journals High-Order Multimode Waveguide Interferometer for Optical Biosensing Applications

Sensors ◽  
2021 ◽  
Vol 21 (9) ◽  
pp. 3254
Author(s):  
Yuri Hayashi Isayama ◽  
Hugo Enrique Hernández-Figueroa
Keyword(s):  
Power Distribution ◽  
Output Signal ◽  
Limit Of Detection ◽  
High Order Mode ◽  
High Order ◽  
Multimode Interference ◽  
Multimode Waveguide ◽  
Waveguide Section ◽  
Optical Biosensing ◽  
Novel Structure

A generalization of the concept of multimode interference sensors is presented here for the first time, to the best of our knowledge. The existing bimodal and trimodal sensors correspond to particular cases of those interference sensors. A thorough study of the properties of the multimode waveguide section provided a deeper insight into the behavior of this class of sensors, which allowed us to establish new criteria for designing more sensitive structures. Other challenges of using high-order modes within the sensing area of the device reside in the excitation of these modes and the interpretation of the output signal. To overcome these, we developed a novel structure to excite any desired high-order mode along with the fundamental mode within the sensing section, while maintaining a fine control over the power distribution between them. A new strategy to detect and interpret the output signal is also presented in detail. Finally, we designed a high-order sensor for which numerical simulations showed a theoretical limit of detection of 1.9×10−7 RIU, making this device the most sensitive multimode interference sensor reported so far.

scholarly journals An Optical Analog-to-Digital Converter with Enhanced ENOB Based on MMI-Based Phase-Shift Quantization

Photonics ◽  
2021 ◽  
Vol 8 (2) ◽  
pp. 52
Author(s):  
Yue Liu ◽  
Jifang Qiu ◽  
Chang Liu ◽  
Yan He ◽  
Ran Tao ◽  
...  
Keyword(s):  
Phase Shift ◽  
Multimode Interference ◽  
Analog To Digital Converter ◽  
Effective Number ◽  
Digital Converter ◽  
Analog To Digital ◽  
Mmi Coupler ◽  
Simulation Results ◽  
Optical Analog ◽  
Optical Quantization

An optical analog-to-digital converter (OADC) scheme with enhanced bit resolution by using a multimode interference (MMI) coupler as optical quantization is proposed. The mathematical simulation model was established to verify the feasibility and to investigate the robustness of the scheme. Simulation results show that 20 quantization levels (corresponding to 4.32 of effective number of bits (ENOB)) are realized by using only 6 channels, which indicates that the scheme requires much fewer quantization channels or modulators to realize the same amount of ENOB. The scheme is robust and potential for integration.

scholarly journals Photonic Routers: Multimode Interference Induced Optical Routing in an Optical Microcavity (Ann. Phys. 5/2021)

2021 ◽  
Vol 533 (5) ◽  
pp. 2170019
Author(s):  
Hong Yang ◽  
Guo‐Qing Qin ◽  
Hao Zhang ◽  
Xuan Mao ◽  
Min Wang ◽  
...  
Keyword(s):  
Multimode Interference ◽  
Optical Microcavity ◽  
Optical Routing

A Selective Modulation Interference Spectrometer

1980 ◽  
Vol 19 (3) ◽  
pp. 471-477 ◽  
Author(s):  
Minoru Yoshida ◽  
Kunio Yoshihara
Keyword(s):  
Selective Modulation ◽  
Interference Spectrometer

scholarly journals High Sensitivity Plasmonic Sensor Based on Fano Resonance with Inverted U-Shaped Resonator

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1164
Author(s):  
Gongli Xiao ◽  
Yanping Xu ◽  
Hongyan Yang ◽  
Zetao Ou ◽  
Jianyun Chen ◽  
...  
Keyword(s):  
Fano Resonance ◽  
Figure Of Merit ◽  
High Sensitivity ◽  
Refractive Index Sensor ◽  
Multimode Interference ◽  
Geometrical Parameters ◽  
The Finite Element Method ◽  
Plasmonic Sensor ◽  
Coupled Mode ◽  
Plasmonic Nanosensor

Herein, we propose a tunable plasmonic sensor with Fano resonators in an inverted U-shaped resonator. By manipulating the sharp asymmetric Fano resonance peaks, a high-sensitivity refractive index sensor can be realized. Using the multimode interference coupled-mode theory and the finite element method, we numerically simulate the influences of geometrical parameters on the plasmonic sensor. Optimizing the structure parameters, we can achieve a high plasmonic sensor with the maximum sensitivity for 840 nm/RIUand figure of merit for 3.9 × 105. The research results provide a reliable theoretical basis for designing high sensitivity to the next generation plasmonic nanosensor.

Curvature and Temperature Sensor Based on Anti-resonant Effect Combined with Multimode Interference

2021 ◽  
pp. 1-1
Author(s):  
Shun Wang ◽  
Panting Niu ◽  
Shuhui Liu ◽  
Shun Wu ◽  
Rui-Bo Jin ◽  
...  
Keyword(s):  
Temperature Sensor ◽  
Multimode Interference ◽  
Resonant Effect

scholarly journals Exposed-core fiber multimode interference sensor

2021 ◽  
pp. 100125
Author(s):  
Jonas H. Osório ◽  
William M. Guimarães ◽  
Lu Peng ◽  
Marcos A.R. Franco ◽  
Stephen C. Warren-Smith ◽  
...  
Keyword(s):  
Multimode Interference ◽  
Core Fiber

Novel approach for design of low index contrast multimode interference devices

2008 ◽  
Vol 55 (12) ◽  
pp. 1913-1921 ◽  
Author(s):  
Jiangong Zhao ◽  
Aijun Wen ◽  
Zengji Liu and Peng Yue
Keyword(s):  
Multimode Interference ◽  
Novel Approach ◽  
Index Contrast
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