Ultra-low-loss tapered optical fibers with minimal lengths.
We design and fabricate ultra-low-loss tapered optical fibers (TOFs) with minimal lengths. We first optimize variations of the torch scan length using the flame-brush method for fabricating TOFs with taper angles that satisfy the adiabaticity criteria. We accordingly fabricate TOFs with optimal shapes and compare their transmission to TOFs with a constant taper angle and TOFs with an exponential shape. The highest transmission measured for TOFs with an optimal shape is in excess of 99.7% with a total TOF length of only 23 mm, whereas TOFs with a constant taper angle of 2 mrad reach 99.6% transmission for a 63 mm TOF length.
Ryutaro
R
Nagai
Takao
T
Aoki
D006358:Hot Temperature; D008855:Microscopy, Electron, Scanning; D008962:Models, Theoretical; D055100:Optical Fibers; D055620:Optical Phenomena