Method of producing optical waveguide

Details Method of producing optical waveguide Method of producing optical waveguide

C - Chemistry, Metallurgy

03

B

49/9

C03B 37/027 (2006.01) C03B 37/012 (2006.01) C03B 37/018 (2006.01)

Patent

CA 1160845

ABSTRACT OF THE DISCLOSURE The present invention relates to a method of pro- ducing an optical waveguide by melt-drawing a transparent glass rod which has been produced by collapsing a porous glass rod after being doped with a dopant material by depositing said material at the surface of the micro pores in order to increase the refractive index of the collapsed glass rod. A waveguide having higher mechanical strength and lower trans- mission is obtained by drawing the glass rod at a temperature very close to the melting point of the outermost portion of the fiber without causing any overmelting or bubbling in the core portion. The drawing process is made possible by match- ing the viscosity and characteristics of the outermost lower- refractive-index portion to those of the central higher- refractive-index portion.

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