| 摘要 |
An optical fiber component comprises an optical element (1), a pair of PhC fibers (2a, 2b) with a large MFD (approximately 30 to 50 .mu.m), and a pair of SM fibers (3a, 3b) with a small MFD (approximately 10 .mu.m). The pair of th e PhC fibers (2a, 2b) has cores (21a, 21b) for transmitting light and clads (22a, 22b) provided on the outer periphery of the cores (21a, 21b). An outpu t end of a first PhC fiber (2a) is optically connected to a light incident end - face (1a) of the optical element (1) with the first PhC fiber output-end aligned with the optical axis of the optical element (1). An input end of a second PhC fiber (2b) is optically connected to a light exit end-face (1b) with the second Phc fiber input end aligned with the optical axis of the optical element (1). An output end of a first SM fiber (3a) is optically connected to the input end of the first PhC fiber (2a) with the first SM fib er output-end aligned with the optical axis of the first PhC fiber. An input en d of a second SM fiber (3b) is optically connected to an output end of the second PhC fiber with the second SM fiber input-end aligned with the optical axis of the first PhC fiber.
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