Patent ID: 6409396
Filing Date: 2002-06-25
Classification: G02B

Abstract:
A fiber optic system, comprising:a light source; a fiber optic transmission component; a receiver or transmitter of radiation; and an interference filter, comprising a glass substrate with at least two interference layers coated thereon; wherein the glass substrate comprises: OxideWeight Percent Based on OxideP2O530-70Al2O3â€‚5-15Râ€²Oâ€‚5-15Râ€² = Mg, Ca, Sr, Ba, Zn, PbR2O R = Li, Na, K15-40and wherein the glass substrate has a coefficient of thermal expansion of 130-210Ã—10âˆ’7/Â° C. at 30Â° C. to 70Â° C.