Distribution measurement of Raman-gain and optical-loss characteristics in optical fibers.
We propose a test method with which to measure the longitudinal distribution of Raman-gain characteristics in connected optical fibers. We describe a technique for obtaining the pump-loss distribution, knowledge of which is necessary for deriving the Raman-gain efficiency distribution, by the bidirectional measurement of Raman amplification. Based on this technique, we performed experiments and demonstrated that the Raman-gain efficiency distribution can be evaluated with the same equipment.
Toge
Kunihiro
K
NTT Access Network Service Systems Laboratories, 1-7-1, Hanabatake, Tsukuba-shi, Ibaraki-ken, 305-0805, Japan. toge@ansl.ntt.co.jp
Hogari
Kazuo
K
Horiguchi
Tsuneo
T