| 摘要 |
At the time of assembly of an optical transmission/reception module, a test variable wavelength light source (22) for outputting a test light signal is connected to a connector (8) of an optical fiber (7), and a large-diameter PD (23) measures a transmission loss in a light wavelength band limiting filter (12) while a rotational position determining unit (24) rotates a fiber ferrule (5), so that the rotational position determining unit (24) determines the rotational position ¸ loss-min of the fiber ferrule (5) which minimizes the transmission loss in the light wavelength band limiting filter (12), and aligns the fiber ferrule (5) at the rotational position ¸ loss-min . |
