Mid-infrared transmission properties of amorphous germanium optical fibers

Mehta, Priyanth; Krishnamurthi, Mahesh; Healy, Noel; Baril, Neil F.; Sparks, Justin R.; Sazio, Pier J. A.; Gopalan, Venkatraman; Badding, John V.; Peacock, Anna C.
August 2010
Applied Physics Letters;8/16/2010, Vol. 97 Issue 7, p071117
Academic Journal
Germanium optical fibers have been fabricated using a high pressure chemical deposition technique to deposit the semiconductor material inside a silica capillary. The amorphous germanium core material has a small percentage of hydrogen that saturates the dangling bonds to reduce absorption loss. Optical transmission measurements were performed to determine the linear losses over a broad mid-infrared wavelength range with the lowest loss recorded at 10.6 μm. The extended transmission range measured in the germanium fibers demonstrates their potential for use in mid-infrared applications.


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