Parallel slit torch for making optical fiber preform

Method for producing glass particulate deposit and method for producing glass preform

Burner modules, methods of forming glass sheets, and glass sheets formed thereby

Three dimensional micro-fabricated burners

Multilayered optical structures

Method of forming optical fiber preforms

Substantially dry, silica-containing soot, fused silica and optical fiber soot preforms, apparatus, methods and burners for manufacturing same