OPTICAL COMMUNICATION SYSTEM AND TERMINAL DEVICE

Title:

OPTICAL COMMUNICATION SYSTEM AND TERMINAL DEVICE

Document Type and Number:

WIPO Patent Application WO/2001/013549

Kind Code:

A1

Abstract:

A terminal device comprises a photodetector (16), an amplitude detection circuit (26), a source of light (22), a driver circuit (24), and a control circuit (28). The photodetector receives a first optical signal. The amplitude detection circuit detects the amplitude of the output from the photodetector. The driver circuit supplies driving current to the source of light so that the source of light may output a second optical signal. The control circuit varies driving current depending on the change in amplitude detected by the amplitude detection circuit. When a network is formed of this terminal device together with another terminal station device, the dynamic range of reception of the other terminal device can be reduced. Therefore, this terminal device improves the extendibility of a network.

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Inventors:

YAMASHITA SHINJI (JP)
MORI KAZUYUKI (JP)
AKASHI TAMOTSU (JP)

Application Number:

PCT/JP1999/004400

Publication Date:

February 22, 2001

Filing Date:

August 13, 1999

Export Citation:

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Assignee:

FUJITSU LTD (JP)
YAMASHITA SHINJI (JP)
MORI KAZUYUKI (JP)
AKASHI TAMOTSU (JP)

International Classes:

H01S5/06; H04B10/25; H04B10/07; H04B10/2507; H04B10/272; (IPC1-7): H04B10/14

Foreign References:

JPH10163960A	1998-06-19
JPH07264131A	1995-10-13
JPH10275939A	1998-10-13
JPH06112561A	1994-04-22
JPH11126935A	1999-05-11
JPH04290483A	1992-10-15

Other References: