Ultralow Loss and Long Length Photonic Crystal Fiber Tajima, Katsusuke ; Zhou, Jian ; Nakajima, Kazuhide ; Sato, Kiminori Abstract Publication: Journal of Lightwave Technology Pub Date: January 2004 DOI: 10.1109/JLT.2003.822143 Bibcode: 2004JLwT...22....7T