We correct the value for the nonlinear Kerr effect of the silicon-rich nitride waveguide presented in Opt. Express 23, 25828 (2015). (C) 2017 Optical Society of America
We correct the value for the nonlinear Kerr effect of the silicon-rich nitride waveguide presented in Opt. Express 23, 25828 (2015). (C) 2017 Optical Society of America
Chalcogenide integrated optic (IO) waveguides operating in the mid-wave infrared (MWIR) are of interest for a variety of applications. They are potentially useful in compact MWIR laser sources for applications such as...
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ISBN:
(纸本)9781510606418;9781510606425
Chalcogenide integrated optic (IO) waveguides operating in the mid-wave infrared (MWIR) are of interest for a variety of applications. They are potentially useful in compact MWIR laser sources for applications such as gas sensing and infrared countermeasures. Most work on chalcogenide integrated optics to date, however, has focused on arsenic sulfide, As2S3, or glasses with similar compositions. These glasses are known to suffer from a host of photo-induced effects including photo-darkening, photo-induced crystallization, and low optical damage thresholds. Furthermore, they can typically accept only low concentration of rare earth dopants without clustering or crystallization. Gallium lanthanum sulfide (GLS) is an alternative chalcogenide glass with great potential for use in IO devices operating in the MWIR. Like As2S3, GLS exhibits a large transparency window in the MWIR and high optical nonlinearity, but it does not suffer from the same type of photo-induced effects. High rare earth dopant concentrations without clustering are possible in GLS because rare earth ions substitute for lanthanum ions in the glass matrix. IO waveguides have previously been fabricated in GLS by several methods. Formerly, it was hypothesized that patterning GLS via reactive ion etching (RIE) was impossible do the presence of lanthanum and rare earth dopant ions, but we present results for GLS waveguides fabricated via RIE. In addition, we demonstrate 2.7 mu m emission from Er3+-doped GLS waveguides resulting from erbium's I-4(11/2)-> I-4(13/2) transition.
In this work we correlate the dimension of the waveguide with small variations of the refractive index of the material used for the waveguide core. We calculate the effective modal refractive index for different dimen...
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ISBN:
(纸本)9781510609853;9781510609860
In this work we correlate the dimension of the waveguide with small variations of the refractive index of the material used for the waveguide core. We calculate the effective modal refractive index for different dimensions of the waveguide and with slightly variation of the refractive index of the core material. These results are used as an input for a set of Finite Difference Time Domain simulation, directed to study the characteristics of amorphous silicon waveguides embedded in a SiO2 cladding. The study considers simple linear waveguides with rectangular section for studying the modal attenuation expected at different wavelengths. Transmission efficiency is determined analyzing the decay of the light power along the waveguides. As far as near infrared wavelengths are considered, a-Si:H shows a behavior highly dependent on the light wavelength and its extinction coefficient rapidly increases as operating frequency goes into visible spectrum range. The simulation results show that amorphous silicon can be considered a good candidate for waveguide material core whenever the waveguide length is as short as a few centimeters. The maximum transmission length is highly affected by the a-Si: H defect density, the mid-gap density of states and by the waveguide section area. The simulation results address a minimum requirement of 300nmx400nm waveguide section in order to keep attenuation below 1 dB cm(-1).
It has long been thought that an optical sensor, such as a light waveguide implemented total analysis system (TAS), is one of the most functional components that will be needed to realize a “ubiquitous human healthca...
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ISBN:
(纸本)9780791858103
It has long been thought that an optical sensor, such as a light waveguide implemented total analysis system (TAS), is one of the most functional components that will be needed to realize a “ubiquitous human healthcare system”. A transparent resin-based TAS chip incorporated with a light waveguide [1] is quite preferable in such a cost-effective and disposal use. In line with the technical demand, we have already proposed a specially fabricated structure for an epoxy resin-based monolithic light waveguide capable of illuminating a cell or particle running along a microfluidic channel [2], as well as of obtaining directivity of fluorescence with a radially arranged waveguide structure (as shown in Figure 1) and a sequential light scanning mechanism based on a forced vibrated optical fiber [3]. Utilizing this TAS system, we have successfully detected preliminary results of fluorescence directivity of a 5-μm-diameter polystyrene particle with scanning angle range of 180 degrees, at illuminating light scanning frequency of approximately 1.7 kHz [4]. However, the transmittance of the trial-manufactured light waveguides was slightly lower owing mainly to its smaller cross section size, and, as a result, signal-to-noise ratio of detected fluorescence signal waveform was not as good as we have expected. To improve the S/N ratio, it is necessary to increase illuminating power of a laser source, and, at the same time, to increase multiplication factor of a photo-electron multiplier sensor to beyond its performance limit. Unfortunately, with the capability of the current equipment, it is difficult to drastically improve the S/N ratio. In this paper, we attempted to apply AC detection method to measure extremely weak fluorescence with a high frequency modulated laser source of its wavelength of 488 nm, and with a high speed lock-in-amplifier having both higher reference frequency up to 3MHz and smaller time constant.
A plasmonic integrated circuit configuration comprising plasmonic and electronic components is presented and the feasibility for high-speed signal processing applications is discussed. In integrated circuits, plasmoni...
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ISBN:
(纸本)9781510609853;9781510609860
A plasmonic integrated circuit configuration comprising plasmonic and electronic components is presented and the feasibility for high-speed signal processing applications is discussed. In integrated circuits, plasmonic signals transmit data at high transfer rates with light velocity. Plasmonic and electronic components such as wavelength-division-multiplexing (WDM) networks comprising metal wires, plasmonic multiplexers/demultiplexers, and crossing metal wires are connected via plasmonic waveguides on the nanometer or micrometer scales. To merge plasmonic and electronic components, several types of plasmonic components were developed. To ensure that the plasmonic components could be easily fabricated and monolithically integrated onto a silicon substrate using silicon complementary metal-oxide-semiconductor (CMOS)-compatible processes, the components were fabricated on a Si substrate and made from silicon, silicon oxides, and metal;no other materials were used in the fabrication. The plasmonic components operated in the 1300- and 1550-nm-wavelength bands, which are typically employed in optical fiber communication systems. The plasmonic logic circuits were formed by patterning a silicon oxide film on a metal film, and the operation as a half adder was confirmed. The computed plasmonic signals can propagate through the plasmonic WDM networks and be connected to electronic integrated circuits at high data-transfer rates.
The paper brings study results of radiation and scattering characteristics of finite and infinite antenna arrays of planar waveguides with both perfectly conducting and impedance flanges loaded with complex impedance ...
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ISBN:
(纸本)9789531842303
The paper brings study results of radiation and scattering characteristics of finite and infinite antenna arrays of planar waveguides with both perfectly conducting and impedance flanges loaded with complex impedance loads. An influence of the array parameters on its electromagnetic characteristic is discussed. Capability of controlling the antenna array scattering characteristics via controlling complex impedance loads is introduced. All studies have been performed for H-polarization
In this paper we present a structural health monitoring (SHM) paradigm based on the simultaneous use of ultrasounds and electromechanical impedance (EMI) to monitor waveguides. The paradigm uses guided ultrasonic wave...
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ISBN:
(数字)9781510608269
ISBN:
(纸本)9781510608252;9781510608269
In this paper we present a structural health monitoring (SHM) paradigm based on the simultaneous use of ultrasounds and electromechanical impedance (EMI) to monitor waveguides. The paradigm uses guided ultrasonic waves (GUWs) in pitch-catch mode and EMI simultaneously. The two methodologies are driven by the same sensing/hardware/software unit. To assess the feasibility of this unified system an aluminum plate was monitored for varying damage location. Damage was simulated by adding small masses to the plate. The results associated with pitch-catch GUW testing mode were used in ultrasonic tomography, and statistical analysis was used to detect the damages using the EMI measurements. The results of GUW and EMI monitoring show that the proposed system is robust and can be developed further to address the challenges associated with the SHM of complex structures. Keywords: Electromechanical Impedance;Guided Ultrasonic Waves;integrated SHM
We simulate giant sideband-resolved interaction between telecom photons and megahertz phonons traveling along a silicon double-slot waveguide. The calculations predict a Rabi flop length below 100 mu m and a Brillouin...
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ISBN:
(纸本)9781943580279
We simulate giant sideband-resolved interaction between telecom photons and megahertz phonons traveling along a silicon double-slot waveguide. The calculations predict a Rabi flop length below 100 mu m and a Brillouin gain coefficient above 10(9)W(-1)m(-1). (c) 2016 Optical Society of America
We utilize electronically reconfigurable liquid metals to dynamically modify the coupling between two THz waveguides, to realize an active tunable filter with channel add-drop functionality.
ISBN:
(纸本)9781943580279
We utilize electronically reconfigurable liquid metals to dynamically modify the coupling between two THz waveguides, to realize an active tunable filter with channel add-drop functionality.
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