Mitsubishi Electric Corporation

Tamon Omura

Masatoshi Katayama

Nobuo Ohata

At the time of assembly of an optical transmission/reception module, a test variable wavelength light sourcefor outputting a test light signal is connected to a connectorof an optical fiber, and a large-diameter PDmeasures a transmission loss in a light wavelength band limiting filterwhile a rotational position determining unitrotates a fiber ferrule, so that the rotational position determining unitdetermines the rotational position &#x3b8;of the fiber ferrulewhich minimizes the transmission loss in the light wavelength band limiting filter, and aligns the fiber ferruleat the rotational position &#x3b8;.

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Tokyo, Japan

Tamon Omura