This paper describes the design for single-mode fibers whose operation wavelengths leading to ultralow loss <0.01 dB/km are in the 2.5-6-µm range. We evaluate the excess loss caused by uniform bending, microbending, and splicing with the formula used for silica-glass fiber. The possibility of preparing the ultralow loss fiber is discussed.
© 1983 Optical Society of America
Yasuyuki Okamura and Sadahiko Yamamoto, "Ultralow loss single-mode fiber design for 2.5-6-µm band operation," Appl. Opt. 22, 3098-3101 (1983)