JPH0423628A - Optical repeater - Google Patents

Abstract

PURPOSE:To attain two-way optical amplification through the use of an optical fiber and to attain 2-way communication by providing an optical connector among two sets of a optical amplifier, input and output of an isolator and optical signal input/output terminals. CONSTITUTION:The repeater is provided with a 1st optical amplifier 1 exciting and amplifying a 1st optical signal, a 1st isolator 3 passing an output of the 1st amplifier 1 in the direction of the arrow and interrupting a 2nd optical signal in the direction opposite to the arrow, a 2nd optical amplifier 2 amplifying a 2nd optical signal, a 2nd isolator 4 passing an output of the 2nd amplifier 2 and interrupting the 1st optical signal in the opposite direction, a 1st optical connector (optical multiplexer and optical demulplexer) connecting an input of the 1st optical amplifier 1 and an output of the 2nd isolator 4 to an optical signal output terminal 8 and a 2nd connector connecting an input of the 2nd optical amplifier 2 and an output of the 1st isolator 3 to an optical signal input/ output terminal 7.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an optical repeater, and more particularly to an optical repeater having an optical amplifier that amplifies an optical signal.

[Conventional technology]

FIG. 2 is a block diagram showing an example of a conventional optical repeater.

The optical amplifier 1a amplifies the optical signal to be relayed using an excitation light source and outputs the amplified signal. The isolator 3a is an optical amplifier 1a
Pass the amplified optical signal from the direction of the arrow in the direction of the arrow, and block the optical signal from the direction of the opposite arrow.

[Problem to be solved by the invention]

This conventional optical repeater has the characteristic that the isolator 3a allows optical signals to pass in only one direction, so there is a problem that bidirectional communication cannot be performed when inserted into an optical cable.

[Means to solve the problem]

The optical repeater of the present invention includes a first optical amplifier that excites and amplifies a first optical signal, and a first optical amplifier that passes the output of the first optical amplifier and blocks a second optical signal from the opposite direction. an isolator, a second optical amplifier that amplifies the second optical signal from the opposite direction, and a second optical amplifier that passes the output of the second optical amplifier and blocks the first optical signal from the opposite direction. and first and second optical connectors that connect the input of the first or second optical amplifier and the output of the first or second isolator to input/output terminals.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram of one embodiment of the present invention.

In this embodiment, a first optical amplifier 1 excites and amplifies a first optical signal, the output of this first optical amplifier 1 is passed in the direction of the arrow, and a second optical signal from the opposite direction is transmitted. 1st block
an isolator 3, a second optical amplifier 2 that amplifies the second optical signal, and an output of the second optical amplifier 2,
A second isolator 4 that blocks the first optical signal from the opposite direction, and a first optical connector that connects the input of the first optical amplifier 1 and the output of the second isolator 4 to the optical signal output terminal 8. (optical demultiplexer and optical multiplexer) and a second optical connector that connects the input of the second optical amplifier 2 and the output of the first isolator 3 to the optical signal output terminal 7. .

In this way, the optical signal input from the optical connector 5 is output to the isolator 3 and the optical amplifier 2, but the optical signal input to the isolator 3 is blocked, and the optical signal input to the optical amplifier 2 is output to the isolator 4 and the optical amplifier 2. It is output through the optical connector 6. An optical signal input from the optical connector 6 is amplified through the optical amplifier 1, and outputted through the isolator 3 and the optical connector 5.

〔Effect of the invention〕

As explained above, the present invention provides bidirectional optical amplification using one optical fiber by providing an optical connector between the input/output terminals of two sets of optical amplifiers and isolators and the optical signal input/output terminals. This has the effect of enabling two-way communication.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a block diagram of an example of a conventional optical repeater. 1.2...first and second optical amplifiers, 3,4...first
and a second isolator, 5, 6... first and second optical connectors, 7.8... optical signal input/output terminal.

Claims (1)

[Claims] a first optical amplifier that excites and amplifies a first optical signal; a first isolator that passes the output of the first optical amplifier and blocks a second optical signal from the opposite direction; a second optical amplifier that amplifies the second optical signal of the second optical amplifier; a second isolator that passes the output of the second optical amplifier and blocks the first optical signal from the opposite direction; or first and second optical amplifiers that connect the input of the second optical amplifier and the output of the first or second isolator to input/output terminals;
An optical repeater comprising: an optical connector;