| 摘要 |
PROBLEM TO BE SOLVED: To provide a mode field conversion optical fiber which has a wide transmission band as well as a greatly increased signal transmission rate and distance using a single mode optical fiber as an inexpensive general-purpose optical fiber. SOLUTION: The mode field conversion optical fiber is provided with a core which is formed in a shape tapered narrower in diameter from one end to the other and which transmits an optical signal and a clad which is installed on the outer circumference of the core and which has a refractive index lower than that of the core. Since the core 11 for transmitting an optical signal is formed taperingly, an optical signal from a light source 5 is made incident on the larger diameter end, with a single mode optical fiber connected to a the smaller diameter end as an inexpensive general-purpose optical fiber. Consequently, a transmission band becomes wider, enabling the signal transmission rate and distance to be greatly increased. COPYRIGHT: (C)2004,JPO&NCIPI |
