OFS-13 : 13th International Conference on Optical Fiber Sensors & Workshop on Device and System Technology toward Future Optical Fiber Communication and Sensing : April 12-16, 1999, Kyongju Hyundai Hotel, Kyongju, Korea - Kim, Byoung Yoon; Hotate, Kazuo, 1951- (Proceedings of SPIE--the International Society for Optical Engineering ;, 1999)