very low-loss optical waveguides
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 ...
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Advanced waveguides for high power optical fibre sources
... quite low values in germanosilicate (200 ppm mol Nd 3+ ions without quenching) ...background loss. The low permissible Nd 3+ -concentration can, thus, lead to a low efficiency in a ...
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Multimode Interference 3 dB Splitters in Hollow Core Metallic Waveguides for Low-Loss THz Wave Transmission
... and low polarization ...mode optical waveguides at the one end of the structure, at periodic intervals along the direction of ...input waveguides in the lateral x- direction, called the ...
7
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 ...
9
Optical loss suppression in long-wavelength semiconductor lasers at elevated temperatures by strong doping of n-waveguides
... the low-power sections of those presented in [8] and so the magnitude of the effect is ...a low n-OCL doping level reaches saturation with extremely modest powers, in agreement with the results shown in ...
17
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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Emergence of THz technologies and design and optimisation low-loss waveguides and devices
... and optical frequencies and normally is defined as the band ranging from ...practical low-loss waveguides. Due to the lack of suitable low-loss waveguides most of the ...
6
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 ...
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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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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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Characterization of low-loss waveguides and devices for terahertz radiation
... (THz) waveguides, such as photonic crystal fibers, quantum cascaded lasers, plasmonic waveguides, power splitters, and narrow-band ...modal loss due to the material and leakage loss in ...
8
Low-loss Waveguides for THz Guidance and Devices
... The loss values of the fundamental plasmonic mode increases with the PS thickness and not shown ...the loss contribution of the polystyrene and silver layers has also been ...minimum loss at a ...
7
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 ...
13
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 ...
9
Second harmonic generation in novel optical waveguides
... One form of early communication using light was with smoke signals where different messages could be conveyed by varying the pattern of smoke. This system required a coding system [1] which was to be understood by the ...
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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
... a very lossy nonlinear cladding (liquid crystal M BBA), the m ain conclusion is th a t, while th e variation of ur w ith power is th e same as in the lossless case, n / (of th e order of 10-4 ) is also dependent ...
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Theory of Carbon Nanotubes as Optical Nano Waveguides
... In the opposite limit r c 0 , where the phase velocity of the surface plasmon is comparable to the velocity of light, surface plasmon oscillations couple with the electromagnetic wave and retardation effects are ...
5
Tapered optical waveguides and metal-clad polarisers
... because, depending on the width and depth of the depression, the second mode is cut off at larger V values4. Secondly, the large index difference at the core-depression interface serves to confine more of the field ...
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