We demonstrate single-mode ZBLAN optical fiber couplers. A controlled tapering procedure leads to coupling ratios of 5%/95% and 14%/86% at a wavelength 2200 nm, with insertion losses 1.6 dB 1.8 dB, respectively.

In this study, grouted couplers were used to connect steel bars as an alternative approach the conventional bar lapping method. The aim is avoid congestion problems and reduce required quantity of in order achieve development length practice. Two categories couplers, i.e., short-threaded grout coupler long coupler, nine groups well one group deformed bars, tested under uniaxial tension. total, ...