Patent ID: 6801698
Filing Date: 2004-10-05
Classification: B29D,C03B,C03C,G02B,G02F,H01S

Abstract:
A fiber waveguide having a waveguide axis, comprising:a first portion extending along the waveguide axis comprising a first material having an index of refraction, n1, a working temperature, Tw, and a softening temperature, Ts; a second portion extending along the waveguide axis comprising a second material having an index of refraction, n2, and a viscosity, &eegr;2, that varies as a function of temperature, T; wherein the absolute difference between n1 and n2 is at least 0.35 and &eegr;2 at Tw is at least 103 Poise and no more than 106 Poise, and &eegr;2 at Ts is at least 105 Poise and no more than 1013 Poise.