scholarly journals Rapid Low Cost Electro-Optic Prototyping for Space Through Use of Cubesats

2012 ◽  
Author(s):  
Renny Fields
Keyword(s):  
Low Cost ◽  
Electro Optic

High-speed electro-optic switch using buried electrode structure in polymer Mach–Zehnder waveguide

2016 ◽  
Vol 30 (06) ◽  
pp. 1650063 ◽  
Author(s):  
Jingwen Sun ◽  
Jian Sun ◽  
Yunji Yi ◽  
Lucheng Qv ◽  
Shiqi Sun ◽  
...  
Keyword(s):  
Insertion Loss ◽  
Rise Time ◽  
High Speed ◽  
Low Cost ◽  
Characteristic Parameters ◽  
Electrode Structure ◽  
Processing Cost ◽  
Electro Optic ◽  
Disperse Red 1 ◽  
Excellent Photostability

A low-cost and high-speed electro-optic (EO) switch using the guest–host EO material Disperse Red 1/Polymethyl Methacrylate (DR1/PMMA) was designed and fabricated. The DR1/PMMA material presented a low processing cost, an excellent photostability and a large EO coefficient of 13.1 pm/V. To improve the performance of the switch, the in-plane buried electrode structure was introduced in the polymer Mach–Zehnder waveguide to improve the poling and modulating efficiency. The characteristic parameters of the waveguide and the electrodes were carefully designed and the fabrication process was strictly controlled. Under 1550 nm, the insertion loss of the device was 12.7 dB. The measured switching rise time and fall time of the switch were 50.00 ns and 54.29 ns, respectively.

scholarly journals Compressive Sensing Based Three-Dimensional Imaging Method with Electro-Optic Modulation for Nonscanning Laser Radar

Symmetry ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 748
Author(s):  
Yulong An ◽  
Yanmei Zhang ◽  
Haichao Guo ◽  
Jing Wang
Keyword(s):  
Compressive Sensing ◽  
3D Imaging ◽  
Low Cost ◽  
Functional Model ◽  
Three Dimensional ◽  
Visible Spectrum ◽  
Depth Map ◽  
Imaging Method ◽  
Practical Applications ◽  
Electro Optic

Low-cost Laser Detection and Ranging (LiDAR) is crucial to three-dimensional (3D) imaging in applications such as remote sensing, target detection, and machine vision. In conventional nonscanning time-of-flight (TOF) LiDAR, the intensity map is obtained by a detector array and the depth map is measured in the time domain which requires costly sensors and short laser pulses. To overcome such limitations, this paper presents a nonscanning 3D laser imaging method that combines compressive sensing (CS) techniques and electro-optic modulation. In this novel scheme, electro-optic modulation is applied to map the range information into the intensity of echo pulses symmetrically and the measurements of pattern projection with symmetrical structure are received by the low bandwidth detector. The 3D imaging can be extracted from two gain modulated images that are recovered by solving underdetermined inverse problems. An integrated regularization model is proposed for the recovery problems and the minimization functional model is solved by a proposed algorithm applying the alternating direction method of multiplier (ADMM) technique. The simulation results on various subrates for 3D imaging indicate that our proposed method is feasible and achieves performance improvement over conventional methods in systems with hardware limitations. This novel method will be highly valuable for practical applications with advantages of low cost and flexible structure at wavelengths beyond visible spectrum.

scholarly journals Ultra-wideband GCPW-MS-GCPW driven electrode for low-cost and wide range application electro-optic modulators

2010 ◽  
Vol 52 (5) ◽  
pp. 1078-1082 ◽  
Author(s):  
Mohammed El-Gibari ◽  
Dominique Averty ◽  
Cyril Lupi ◽  
Hongwu Li ◽  
Serge Toutain
Keyword(s):  
Low Cost ◽  
Ultra Wideband ◽  
Electro Optic ◽  
Wide Range

Organic Polymer Integrated Optics: Recently Design and Simulation of an Electro-Optic 2x3 Switch

2011 ◽  
Vol 230-232 ◽  
pp. 80-84
Author(s):  
Syuhaimi Ab.Rahman Mohammad ◽  
Mohamed Shaktur Khaled ◽  
Mohammad Rahmah
Keyword(s):  
Optical Switching ◽  
Optical Switch ◽  
Low Cost ◽  
Polymeric Materials ◽  
Fabrication Process ◽  
Organic Polymer ◽  
Electro Optic ◽  
High Degree ◽  
Optical Switching Networks ◽  
All Optical Switching

Electrooptic waveguide technology is suitable for realization of an electro-optic 2x3 switch based on integrated Mach-Zehnder interferometer using polymer material, where ESO of polymeric materials were used. It can provide high performances and it is applicable for all optical switching networks. The relatively low cost technology, easy fabrication process with standard optoelectronic fabrication process and with high degree of integration compared to other technologies make the development of optical switch based on this technology favorable one.

scholarly journals A compact plasmonic MOS-based 2×2 electro-optic switch

Nanophotonics ◽  
2015 ◽  
Vol 4 (3) ◽  
pp. 261-268 ◽  
Author(s):  
Chenran Ye ◽  
Ke Liu ◽  
Richard A. Soref ◽  
Volker J. Sorger
Keyword(s):  
Integrated Circuits ◽  
Indium Tin Oxide ◽  
Low Cost ◽  
Extinction Ratio ◽  
Polarized Light ◽  
Transverse Magnetic ◽  
Silicon On Insulator ◽  
Oxide Semiconductor ◽  
Seamless Integration ◽  
Electro Optic

Abstract We report on a three-waveguide electro-optic switch for compact photonic integrated circuits and data routing applications. The device features a plasmonic metal-oxide-semiconductor (MOS) mode for enhanced light-matter-interactions. The switching mechanism originates from a capacitor-like design where the refractive index of the active medium, indium-tin-oxide, is altered via shifting the plasma frequency due to carrier accumulation inside the waveguide-based MOS structure. This light manipulation mechanism controls the transmission direction of transverse magnetic polarized light into either a CROSS or BAR waveguide port. The extinction ratio of 18 (7) dB for the CROSS (BAR) state, respectively, is achieved via a gating voltage bias. The ultrafast broadband fJ/bit device allows for seamless integration with silicon-on-insulator platforms for low-cost manufacturing.

scholarly journals Electro-Optical Biosensor Based on Embedded Double-Monolayer of Graphene Capacitor in Polymer Technology

Polymers ◽  
2021 ◽  
Vol 13 (20) ◽  
pp. 3564
Author(s):  
Ary V. R. Portes ◽  
Ana J. L. Martins ◽  
Jesus Alvarez Guerrero ◽  
Mauricio M. Carvalho ◽  
Ferney O. Amaya-Fernandez ◽  
...  
Keyword(s):  
Refractive Index ◽  
Point Of Care ◽  
Low Cost ◽  
Optical Biosensor ◽  
Phase Changes ◽  
Monolayer Graphene ◽  
Interaction Length ◽  
Graphene Layers ◽  
Electro Optic ◽  
Large Phase

In this work, we present an interferometric polymer-based electro-optical device, integrated with an embedded double-monolayer graphene capacitor for biosensing applications. An external voltage across the capacitor applies an electric field to the graphene layers modifying their surface charge density and the Fermi level position in these layers. This in turn changes the electro-optic properties of the graphene layers making absorption in the waveguide tunable with external voltages. Simultaneously, it is possible to appreciate that this phenomenon contributes to the maximization of the light-graphene interaction by evanescent wave in the sensing area. As a result, it is obtained large phase changes at the output of the interferometer, as a function of small variations in the refractive index in the cladding area, which significantly increasing the sensitivity of the device. The optimum interaction length obtained was 1.24 cm considering a cladding refractive index of 1.33. An absorption change of 129 dB/mm was demonstrated. This result combined with the photonic device based on polymer technology may enable a low-cost solution for biosensing applications in Point of Care (PoC) platform.

scholarly journals Growth and characterization of KDP single crystals by Sankaranarayanan-Ramasamy (SR) method

2017 ◽  
Vol 1 (T4) ◽  
pp. 88-94
Author(s):  
Vinh Trung Phan ◽  
Anh Thi Quynh Le ◽  
Dat Thanh Huynh
Keyword(s):  
Single Crystals ◽  
Optical Switch ◽  
Low Cost ◽  
Nonlinear Effects ◽  
Supersaturated Solution ◽  
Kdp Crystal ◽  
Large Size ◽  
Electro Optic ◽  
Sr Method

Pure KDP single crystals were studied extensively since the 1930s because they could be grown easily to reach a large size, of their low cost and piezoelectric property. Since then, many applications of the KDP crystal have been developed such as the electro-optic modulation, the optical switch (Q-Switch) and the frequency of laser converter through the second-, thirdorder nonlinear effects. In response to these applications, the high-quality KDP single crystals are required. The common method of growing KDP crystal is the temperature lowering, in which a KDP seed is placed in a supersaturated solution. The disadvantage of this method is the spontaneous appearance of crystalline clusters at the bottom of the container which retard the growth of the main crystal. Since the 2010s, Sankaranarayanan and Ramasamy have proposed a new method of growing crystal by designing the Y-shaped solution container. In this study, the KDP single crystals were grown by the SR method. These crystals have better quality, fewer defects, higher hardness and density, and especially material saving compared to the ones prepared by the traditional methods.

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