| 摘要 |
<p>A method for making a multicore large diameter optical fiber waveguide having a cross-section of at least about 0.3 millimeters, two or more inner cores, a cladding surrounding the cores, and one or more (side) holes for reducing the bulk modulus of compressibility and maintaining the anti-buckling strength of the fiber. The method comprises assembling a preform by providing an outer tube having a cross-section of at least about 0.3 millimeters and arranging two or more preform elements within the outer tube; heating the preform; and drawing the large diameter optical waveguide from the heated preform. In one embodiment, the method also includes the step of arranging at least one inner tube inside the outer tube. The large diameter optical fiber waveguide comprises silica-based glass with appropriate dopants; other materials such as phosphate glass or solely plastic may be used. Bragg gratings can be written into the cores.</p> |
