All silica fibers improve the power handling and the wavelength range compared to Hicorpwell fibers.
To achieve maximum power transmission the beam must be focussed properly into the core of the fiber.
But because power levels are constantly increasing and pushed to their limits,
a part of the laser energy can be launched into the cladding.
Hicorpwell construction the polymer cladding can be burned and the probe destroyed.
On the contrary an all silica fiber with an higher core to clad ratio (1,1 to 1,2) is capable of accepting a part of the energy in the cladding. This part will not be transmitted but the fiber will not be damaged. It is generally recommended however that the spot diameter fills no more than 2/3 of the fiber’s core.
