Patent ID: 7963126

Claim:
A method for fabricating a glass fiber for reinforcing a transparent composite matrix, consisting essentially of comprising: providing a first glass fiber preform having a refractive index, a first modulus, and a first durability characteristic; coating the first glass fiber preform with a second glass material having a second refractive index, a second modulus and a second durability characteristic to form a glass fiber preform having an initial cross-section with a preform total thickness; and hot working the glass fiber preform to reduce the initial cross-section to a final cross-section having total thickness, a thickness of the first glass material, and a substantially uniform coating thickness of the second glass material; and forming a plurality of the glass fiber into a composite window; wherein the second durability characteristic is greater than the first durability characteristic; and wherein the first and second durability characteristic selected from the group comprising resistance to chemical attack, resistance to acid attack, resistance to fading from exposure to UV radiation, and resistance to mechanical abrasion.