[OPTICAL REVIEW Vol. 4, No. 6 (1997) 634-635]
Tapered Multi-Mode Fiber for Low Loss Optical Spot Size Demagnification
Tetsuya MIYAZAKI,1,3 Yoshio KARASAWA1,3 and Minoru YOSHIDA2
1ATR Optical and Radio Communications Research Laboratories, Seika, Kyoto, 619-02 Japan, 2Mitsubishi Cable Industries, Ltd., Itami, Hyogo, 664 Japan
(Received March 19, 1997; Accepted October 22, 1997)
Multi-mode tapered fiber has been proposed and demonstrated for demagnifying optical spot size. A loss of less than 5-dB in the conversion of spot size in the range of 400 μm to 125 μm is achieved. The conversion loss dependence on the taper fiber length has experimentally clarified.
Key words : tapered multi-mode fiber, optical spot size demagnification