US 2004/0057731 A1 · Optical transmission apparatus

Optical transmission apparatus

AssigneeFuji Xerox Co., Ltd.

InventorsShinobu Ozeki, Akira Toshima, Masao Funada, Kenichi Kobayashi, Hidenori Yamada, Takeshi Kamimura, Yoshihide Sato, Junji Okada, Takehiro Niitsu, Shinya Kyozuka, Kazuhiro Sakai, Kazuhiro Suzuki, Tomo Baba, Tsutomu Hamada, Masaru Kijima, Osamu Takanashi, Masaaki Miura, Osamu Ueno

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Abstract

In an optical transmission apparatus in which a plurality of nodes are optically connected to one another via an optical transmission path, a light signal which is coded so that a mixture ratio of 1 and 0 constituting data is made close to 50% is transmitted through the optical transmission path. When a light signal is not emitted from all of the nodes, a dummy signal which is an AC-like signal is emitted to the optical transmission path. Therefore, an optoelectric conversion section can be always set to an active state, and the signal recognizability can be prevented from being lowered.

Claims7

Dependent claims

An optical transmission apparatus for transmitting an optical signal, comprising:

a plurality of circuit boards each including:
a data conversion section for converting transmission data into conversion data in which mixture ratio of signals “0” and signals “1” is a constant;
an optical communication section for outputting the optical signal based on the conversion data;
a control section;
and
a optical transmission path connecting the circuit boards optically,
wherein the control section monitors the optical transmission path and sets the optical communication section in a waiting state when the optical transmission path operates.

4 more elements

Dependencies are inferred from the claim text.