Fused taper infrared optical fiber couplers in chalcogenide glass |
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Authors: | Schaafsma D.T. Moon J.A. Sanghera J.S. Aggarwal I.D. |
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Affiliation: | US Naval Res. Lab., Washington, DC; |
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Abstract: | We have fabricated low loss, high coupling ratio bidirectional optical couplers for infrared light using multimode step-index chalcogenide fiber. Using a fusion technique similar to that commonly employed with silica fibers, we have found a temperature regime where fusion can occur while interdiffusion of the core and cladding materials will not. The resultant device has a roughly 3:1 coupling ratio, less than 0.3 dB of excess insertion loss, and preserves the guided modes of the fiber intact |
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