K
K. Ishihara
Researcher at Nippon Telegraph and Telephone
Publications - 33
Citations - 327
K. Ishihara is an academic researcher from Nippon Telegraph and Telephone. The author has contributed to research in topics: Optical fiber & Optical fiber cable. The author has an hindex of 9, co-authored 33 publications receiving 310 citations. Previous affiliations of K. Ishihara include Fujikura.
Papers
More filters
Journal ArticleDOI
First measurement of strain distribution along field-installed optical fibers using Brillouin spectroscopy
TL;DR: In this paper, the authors measured the residual strain distributions along optical fibers in a 1.3 km-long cable before and after installation using Brillouin optical-fiber time domain analysis.
Journal ArticleDOI
A splicing and inspection technique for single-mode fibers using direct core monitoring
TL;DR: In this paper, a basic study has been made of single-mode fiber splicing techniques using direct core monitoring, which includes a highly accurate axis alignment and a post-inspection technique to guarantee the splice-loss standards.
Journal ArticleDOI
Brillouin characterization of fiber strain in bent slot-type optical-fiber cables
TL;DR: In this article, a technique based on Brillouin gain spectroscopy is proposed to evaluate tensile and compressive strain variation in optical fibers, which is applied to characterize fiber strain in bent slot-type optical-fiber cables.
Patent
Optical cable and its manufacturing method
Nobuyuki Yoshizawa,Tsuneo Horiguchi,K. Ishihara,Tetsuro Yabuta,Kurashima Toshio,Hidenobu Tada +5 more
TL;DR: In this paper, an optical cable has a center member (1) around which a plurality of coated optical fibers (3) are tightly stranded, and each optical fiber is given uneven strains in its longitudinal direction.
Proceedings ArticleDOI
First measurement of strain distribution along field-installed optical fibers using Brillouin spectroscopy
TL;DR: In this paper, the authors report on the strain distribution in optical fibers measured using Brillouin Optical-Fiber Time Domain Analysis (BOTDA) both before and after installation into the field conduit.