Silica (pure glass) fibers are used because of their low intrinsic material absorption at the wavelengths of operation. This wavelength of operation is between two intrinsic absorption regions. What are these two regions called? What are the wavelengths of operation for these two regions?

Silica (pure glass) fibers are used because of their low  intrinsic material absorption at the wavelengths of operation.  This wavelength of operation is between two intrinsic absorption  regions. What are these two regions called? What are the  wavelengths of operation for these two regions?
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1 Answer

Answer :

Ultraviolet absorption region (below 400 nm) and infrared  absorption region (above 2000 nm).
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