Sidewall-Grating-Assisted Polymer-Waveguide Directional Coupler for Forward Coupling of Fundamental Modes

2015 ◽  
Author(s):  
Yan Wang ◽  
Kaixin Chen ◽  
Lingfang Wang ◽  
Kin Seng Chiang
Keyword(s):  
Directional Coupler ◽  
Polymer Waveguide

Temperature dependence of polymer waveguide directional coupler

1994 ◽  
Author(s):  
Alok K. Das ◽  
Amar K. Ganguly ◽  
Mehabub A. Mondal ◽  
Dilip K. Paul
Keyword(s):  
Temperature Dependence ◽  
Directional Coupler ◽  
Polymer Waveguide

Structured methods for improving flow measurement accuracy in pipelines

2020 ◽  
pp. 30-35
Author(s):  
Gurami N. Akhobadze
Keyword(s):  
Flow Measurement ◽  
Measurement Accuracy ◽  
Directional Coupler ◽  
Signal To Noise Ratio ◽  
Scattered Wave ◽  
Orthogonal Polarization ◽  
Flow Sensors ◽  
Information Signal ◽  
Mass Flows ◽  
Processing Device

In the age of digital transformation of production processes in industry and science the development and design of intelligent flow sensors for granular and liquid substances transferring through pipelines becomes more important. With this in view new approaches for improving the accuracy of microwave flowmeters are proposed. Taking into account the characteristics ofelectromagnetic waves propagating through a pipeline, a wave scattered by inhomogeneities of the controlled medium is analyzed. Features of the transformation of the polarized scattered wave limiting the geometric dimensions of the pipeline and optimizing the values of the useful scattered signal are revealed. Expediency of collection of the information signal with orthogonal polarization of the scattered wave and through a directional coupler is substantiated. The method of estimating the measurement accuracy with reference to the signal-to-noise ratio at the input of the processing device is given. The research results can be used in cryogenic machine engineering to measure volume and mass flows of liquid cryogenic products.

Loss Characteristics of Polymer Waveguide Fabricated by UV Laser Drawing of an Optically-Sensitive Hybrid Silicone

2011 ◽  
Vol E94-C (12) ◽  
pp. 1858-1860
Author(s):  
Soichi KOBAYASHI ◽  
Seigi OKI ◽  
Takahiro ISHIKURA ◽  
Keisuke KATO ◽  
Toshihiro SUDA
Keyword(s):  
Uv Laser ◽  
Polymer Waveguide

Design and measurement of broadband loop mirror with curved directional coupler based on Si waveguides

2020 ◽  
Vol 59 (11) ◽  
pp. 112002
Author(s):  
Takuya Mitarai ◽  
Eissa Moataz ◽  
Takayuki Miyazaki ◽  
Tomohiro Amemiya ◽  
Nobuhiko Nishiyama
Keyword(s):  
Directional Coupler ◽  
Loop Mirror

Simplified Analysis and Applications of Single Mode Active Directional Coupler with Parallel Electrodes

2009 ◽  
Vol 19 (1) ◽  
pp. 47-62
Author(s):  
Adel l Zaghlou ◽  
Rasheed El-Awady ◽  
Sayed Kamel ◽  
Sohair Mahfouz
Keyword(s):  
Directional Coupler ◽  
Single Mode ◽  
Simplified Analysis

New structure of optical homodyne receiver utilising a 4×4 fibre directional coupler

1988 ◽  
Vol 24 (19) ◽  
pp. 1212 ◽  
Author(s):  
Xiaopin Zhang ◽  
Zhang Sun ◽  
Peida Ye
Keyword(s):  
Directional Coupler

scholarly journals Low-Loss and Broadband Nonvolatile Phase-Change Directional Coupler Switches

ACS Photonics ◽  
2019 ◽  
Vol 6 (2) ◽  
pp. 553-557 ◽  
Author(s):  
Peipeng Xu ◽  
Jiajiu Zheng ◽  
Jonathan K. Doylend ◽  
Arka Majumdar
Keyword(s):  
Phase Change ◽  
Directional Coupler ◽  
Low Loss

scholarly journals A balanced-to-balanced directional coupler based on branch-slotline coupled structure

Frequenz ◽  
2020 ◽  
Vol 74 (11-12) ◽  
pp. 427-433
Author(s):  
Yaxin Liu ◽  
Feng Wei ◽  
Xiaowei Shi ◽  
Cao Zeng
Keyword(s):  
Directional Coupler ◽  
Return Loss ◽  
Design Method ◽  
Differential Mode ◽  
Arbitrary Power ◽  
Measurement Results ◽  
Transition Structures ◽  
Coupled Structures ◽  
Better Than ◽  
Good Agreement

AbstractIn this paper, a balanced-to-balanced (BTB) branch-slotline directional coupler (DC) is firstly presented, which can realize an arbitrary power division ratios (PDRs). The coupler is composed by microstrip-to-slotline (MS) transition structures and branch-slotline coupled structures. The single-ended to balanced-ended conversion is simplified and easy to implemented by the MS transition structures, which intrinsically leads to the differential-mode (DM) transmission and common-mode (CM) suppression. Moreover, the different PDRs which are controlled by the widths of branch-slotlines can be achieved. In order to verify the feasibility of the proposed design method, two prototype circuits of the proposed coupler with different PDRs are fabricated and measured. The return loss and the isolation of two designs are all better than 10 dB. Moreover, the CM suppressions are greater than 35 dB. A good agreement between the simulation and measurement results is observed.

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