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In this paper, we will demonstrate the possibility of opening a new telecommunications transmission window around the 2 µm wavelength, in order to exploit the potential low loss of hollow-core photonic bandgap fibers, with the benefits of significantly lower non-linearity and latency. We will show recent efforts developing a dense wavelength division multiplexing testbed at this waveband, with 100...
High bandwidth 2-$\mu \text{m}$ wavelength surface normal p-i-n photodiodes using a high indium-content InGaAs strain-relaxed absorbing layer clad by p- and n-doped AlInGaAs layers are realized. A parabolic grading was used to relax the lattice constant from that of the InP substrate. We compare structures with different p-doping profiles and absorber thicknesses to achieve a 3-dB bandwidth of ...
We propose a lensed fiber design exhibiting good coupling efficiency together with a long working distance for the coupling of silicon based nanophotonic waveguides to a single mode optical fiber. The lensed fiber consists of a coreless fiber tip coated with a high refractive index material. Numerical simulations show that the coupling loss as low as -0.5 dB can be achieved with a working distance...
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