Mid-infrared transmission by a tellurite hollow core optical fiber

Development of low‐loss lead‐germanate glass for mid‐infrared fiber optics: II. preform extrusion and fiber fabrication

“…This opens up fabrication of lead-germanate glass fibers with sophisticated structures, 42 that are difficult to achieve with mechanical drilling, casting or stacking method. 45 The unstructured (core-only) GPLN fiber made using the extrusion technique showed a low loss of ~1.0 dB/m at 1.3 μm, 46 which is similar to the loss of ~2 dB/m at 1.2 μm of the multimode core/clad GPGN fiber made using the rod-in-tube technique. 40 This indicates that the extrusion process does not introduce additional loss.…”

“…The billet extrusion technique has been widely used for low T g heavy metal oxide glasses such as lead‐silicate 41,42 and tellurite glasses 16,43,44 to make microstructured fiber preforms with complex structures. This opens up fabrication of lead‐germanate glass fibers with sophisticated structures, 42 that are difficult to achieve with mechanical drilling, casting or stacking method 45 . The unstructured (core‐only) GPLN fiber made using the extrusion technique showed a low loss of ~1.0 dB/m at 1.3 μm, 46 which is similar to the loss of ~2 dB/m at 1.2 μm of the multi‐mode core/clad GPGN fiber made using the rod‐in‐tube technique 40 .…”

Glass: The carrier of light—Part II—A brief look into the future of optical fiber

“…Hollow core optical fibers have been made from a range of materials including soft 44 and infrared (IR) glasses. [45][46][47][48][49] However, for reasons discussed immediately below, they have dominantly been made from pure silica. Accordingly, another trend is… 2.3 | "If you can do it with silica, do it with…”

Laser-Based Trace Gas Detection inside Hollow-Core Fibers: A Review

“…Transmission at even longer wavelengths has been obtained using other glass types. NC HCFs made of various materials have been demonstrated, including borosilicate [77], tellurite [78], and chalcogenide [79][80][81] glass. In [82], a 1.15-m-long borosilicate NC HCF with a core dimeter of more than 100 µm was used for gas sensing near 5.26 µm.…”