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Silica aerogel is a very light and highly porous form of silica glass, with densities and refractive indices much lower than those of ordinary solids. We describe optical interactions with aerogel surrounding tapered fibres or inside the holes of photonic crystal fibres. This enables a new class of fibre devices exploiting the properties of the aerogel as a rigid yet porous replacement for air, as...
We demonstrate spectral broadening in tapered optical fibres embedded in silica aerogel. The aerogel provides protection to the taper without noticeably affecting the refractive and dispersive properties or power handling.
Summary form only given. We report a new quantum detection scheme based on nonlinear optical frequency doubling, which converts the incident fundamental IR photons to the secondharmonic blue photons before entering photoelectric detectors. Our scheme is shown in which second-harmonic generation (SHG) is considered as a part of detector (or meter) in order to detect the modulation signals carried in...
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