low-loss optical waveguides
Optical loss suppression in long-wavelength semiconductor lasers at elevated temperatures by strong doping of n-waveguides
... retain low optical losses up to high injection levels [7] [2, 4] as well as low electrical resistance [2], both contributing to highly efficient laser operation in either CW or pulsed regime ...
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Characterization of low-loss waveguides and devices for terahertz radiation
... the optical power confinement in the inner air-core is of the order of ...the loss in the PS layer. This mode shows a greater promise to achieve low-loss guidance through a metal clad ...
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Mode resolved Fabry Perot experiment in low loss Bragg reflection waveguides
... Regarding waveguides, their typically very rich spatial mode structure [14–16] may pose a significant challenge in their ...mode waveguides a clear fringe con- trast can be recorded in the Fabry-Perot ...
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Emergence of THz technologies and design and optimisation low-loss waveguides and devices
... the loss contribution of the polystyrene and silver layers has also been ...minimum loss at a polystyrene thickness of about 1 μm and 13 μm, ...the optical power confinement in the inner air-core is ...
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Article Ultra-Low-Loss Silicon Waveguides for Heterogeneously Integrated Silicon/III-V Photonics
... coherent optical frequency domain reflectometry (OFDR) technique with a commercially available system (Luna ...propagation loss of the fabricated Si rib ...propagation loss with high accuracy ...
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Design and Characterization Low-loss modes in Dielectric-Coated Hollow-core waveguides at THz Frequency
... study loss and dispersion characteristics of the dielectric-coated hollow-core waveguide, a full-vectorial finite element method (FEM) is ...and optical guided-wave devices including the intermediate ...
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Low-loss Waveguides and Devices for Compact THz Systems
... Dielectric waveguides in silica, silicon, polymer, and other semiconductors materials have been widely used at optical frequencies: however most of these materials are very lossy at the lower terahertz ...
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Tunable optical buffer through an analogue to electromagnetically induced transparency in coupled photonic crystal cavities
... compact, low-loss delay line that can be tuned with low power consumption and compares favourable with other delay line implementations across typical figures of merit (optical loss, ...
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Channel Waveguides in Lithium Niobate and Lithium Tantalate
... niobate. Low-loss thin films of lithium niobate have been sputtered onto alternative substrates including sapphire and silica ...fabricating waveguides [24, ...channel waveguides on ...
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The production and transmission characteristics of low loss optical fibre waveguides
... CHAPTER 11 SPLICING TOLERANCES IN GRADED-INDEX FIBRES 11,1 Calculation of Splice Loss Pll.l It was shoim in Chapter 9 that tunnelling leaky modes in parabolic-index fibres are all contai[r] ...
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Low-loss Waveguides for THz Guidance and Devices
... and optical frequencies and normally is defined as the band ranging from ...coplanar waveguides [4] are highly lossy and ...dielectric waveguides have been the use of photonic crystal fibers at ...
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Active and passive coupled-resonator optical waveguides
... Recently, loss- compensated ring resonators in InP-InGaAsP have been reported [79], thus a lossless or even amplifying microring CROW may be ...passband, low-loss, high-order coupled microring ...
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Low-loss ARROW waveguide with rectangular hollow core and rectangular low-density polyethylene/air reflectors for terahertz waves
... Designing low-loss waveguides for terahertz waves is challenging as most materials are very lossy in this frequency ...through low-loss air, which however also has its own difficulties ...
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The control of gold and latex particles on optical waveguides
... The laser source used for most of the experiments was a 5W, continuous wave, linearly polarised, Ytterbium doped, diode pumped, fibre laser (IPG-Photonics, PYL-5-1064- LP) with an output collimator. It supplied a ...
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Tapered optical waveguides and metal-clad polarisers
... As is well known, the coupling of power between the cores can be described either by the beating between the fields of the fundamental symmetric and lowest order antisymmetric modes of the coupler or by considering the ...
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Second harmonic generation in novel optical waveguides
... Phase matching is generally defined as a means for maintaining the phase relationship between the waves involved in nonlinear interactions which is a key contributor to the efficiency of the frequency conversion process. ...
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Theory of Carbon Nanotubes as Optical Nano Waveguides
... With the discovery by Iijima [1] of carbon nanotubes (CNTs) structures, a new class of materials with a re- duced dimensionality has been introduced. Metallic CNTs are considered suitable candidates in the field of ...
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Coupled-resonator optical waveguides and multiplexed solitons
... generation, low-threshold lasing, ...these waveguides may realize the proposals for new types of optical devices, with new functionalities in optical ...‘nonlinear optical delay lines’ ...
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Wavelength dependent effects in optical fibre waveguides
... the main body of the thesis consists of four chapters describing measurements of material dispersion Chapter 3, of intermodal dispersion Chapter 4, of the effect of stress and temperatur[r] ...
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Theoretical studies of nonlinear planar optical waveguides
... 118 C H AP T E R 5. WAVEGUIDES INVOLVING SDF N ON L IN EA RI T IE S line is simply W 2 as a function of B co; this is a straight line because W 2 = V 2 + B co. T he dash and dash-dot curves are for Ai and A2 ...
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