A single-mode optical fiber comprising a first core, within a predetermined radial distance from the center of the fiber has a constant index of refraction; second core wrapped in the first core, the refractive index increases with its radius from the first core The refractive index decreases; ...
Dispersion is a crucial parameter for TD fNIRS since it broadens the light pulses traveling in the fiber. When using a narrow bandwidth source (e.g. laser), total dispersion is dominated by modal dispersion in a multimode fiber, while material (chromatic) dispersion can be dominant in a sin...
performance.Thebandwidthofopticalfibertransmissionis muchhigherthanthatofcoppercable,andthemaximum connectiondistanceofopticalfibersupportismorethantwo kilometers.Itisaninevitablechoicetobuildalargerscale network. Nowtherearetwodifferenttypesoffibers,single-modeand ...
Using the coupling between a standard single-mode fiber and single higher-order modes in a high-index overlay waveguide, we demonstrate a wavelength-filtering device with a channel-dropping response. Two types of filter are described. One uses a thin overlay waveguide, giving a single tunable dro...
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1. Multimode insertion loss: < 0.5dB (0.25dB typical) 2. Multimode return loss: Better than -25dB 3. Singlemode insertion loss: < 0.5dB (0.25dB Typical) 4. Singlemode return loss: Better than -55dB 5. Minimum 62.5/125µ M Fiber 850/1300nm Bandwidth: 160/500 MHz-km ...
fiber modes, single-mode vs. multimode fibers, the influence of refractive index profiles, basic properties of step-index fibers such as core diameter, numerical aperture and acceptance angle, V number, propagation losses and polarization properties, chromatic dispersion and nonlinear properties, with ...
MPB Communications) was coupled with a polarization-maintaining single-mode fiber (PM-S405-XP, Thorlabs) after passing through an acousto-optic tunable filter (AOTFnC-400.650-TN, AA Opto-electronic) for power modulation. The excitation light coming out of the fiber was focused onto the pupil pla...
and a HeNe laser (Melles Griot) working at 556 and 633 nm, respectively, were coupled into a single-mode fiber using a 60x microscope objective lens (Newport). The single-mode fiber was then butt-coupled into the optofluidic chip. The fluorescence emission from tagged particles was coupled...
Draka also has a number of ruggedized multimode fiber cable solutions for multimode or indoor-outdoor cable. See the new Bend- Insensitive fiber optic cable which allows for much more severe twisting and bending whils allowing excellent data transmission from point to point....