Title :
Coupling Loss From Free Space to Large Mode Area Photonic Crystal Fibers
Author :
Nahar, Niru K. ; Rojas, Roberto G.
Author_Institution :
Dept. of Electr. & Comput. Eng., Ohio State Univ., Columbus, OH, USA
Abstract :
Simulated and measured results are presented for the coupling loss from free space into a large mode area (LMA) photonic crystal fiber. The total measured loss (using bulk optics) for a signal (¿ = 1.55 ¿m) going in and out of a 1-m-long fiber was -2.15 dB. It was also observed that the fiber is not that sensitive to lateral misalignment compared that to the conventional single-mode fiber. Due to the low loss, this type of fiber could be used to create long delays in optical true-time-delay engines based on the White cell concept and others. The above loss can be further reduced by using field lenses or lensed LMA.
Keywords :
holey fibres; optical fibre couplers; optical fibre losses; photonic crystals; coupling loss; large mode area photonic crystal fiber; lateral misalignment; optical true-time-delay engines; single-mode fiber; size 1 m; wavelength 1.55 mum; white cell concept; Area measurement; Delay; Engines; Extraterrestrial measurements; Lenses; Loss measurement; Optical fiber losses; Optical losses; Optical sensors; Photonic crystal fibers; Coupling loss; White cell; photonic crystal fiber;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2008.925034
