JPS6258736A - Redundant and multiple optical transmission system - Google Patents

Abstract

PURPOSE:To keep a multiple and redundant function as it is even when a failure occurs in a part of the constituting element of a system by providing plural optical/electric converters at everyone of plural optical wave dividers connected to each optical wave synthesizer corresponding one to one through an optical fiber. CONSTITUTION:At optical wave dividers 61, 62 and 63, inputted optical signals are converted to original optical signals having the wave lengths of lambdaa, lambdab and lambdac and the optical signals having respective wave length are inputted respectively to three optical/electric converters 81a-83c arranged corresponding to each optical wave divider 61, 62 or 63. At such a time, since the optical signals having the wave lengths of lambdab and lambdac are effective by optical/electric converters 42 and 43 even when the failure occurs in an electric/optical converter 41, receiving output signals SR1b, SR2b, SR3b, SR1c, SR2c and SR3c corresponding to transmission signals ST and ST are obtained by optical/electric converters 81b, 82b, 83b, 81c, 82c and 83c at a receiving side.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a redundant multiplex optical transmission system for improving system reliability in an optical communication system.

(Prior art and its problems) In this type of conventional redundant multiplex optical transmission system, as shown in FIG. 2 with an example of a triple redundant system, an optical transmitter 1 and an optical receiver 2 are The number of series connected one-to-one with fibers 3 is equal to the number of redundant multiplexes.

Therefore, if any equipment, device, or other component of one series fails, that series becomes completely inoperable.
This has the disadvantage of reducing the reliability of optical communication systems.

(Purpose of the Invention) This invention was made to solve the above problem, and provides highly reliable redundant multiplex optical transmission that can maintain the multiplex redundant function even if some components fail. The purpose is to provide a system.

(Means for Achieving the Object) In order to achieve the above object, the redundant multiplex optical transmission system of the present invention includes a plurality of electrical/optical converters that receive transmission signals and convert them into optical signals of different wavelengths. Provide these electric/
One of a plurality of optical demultiplexers that are provided with a plurality of optical multiplexers that receive and optically multiplex all of the optical signals from the optical converter, and that are connected one-to-one to each of the above optical multiplexers via optical fibers. By providing a plurality of optical/electrical converters corresponding to the number of electrical/optical converters for each optical demultiplexer, the optical signal demultiplexed by each optical demultiplexer can be divided into multiple optical signals corresponding to the optical demultiplexer. The above light/
It is configured so that each photoelectric conversion is performed separately using an electric converter.

(Embodiment) FIG. 1 is a block diagram showing a redundant multiplex optical transmission system which is an embodiment of the present invention.

This redundant multiplex optical transmission system has a triple redundant system, and the transmitting side receives transmission signals ST, ST2 and ST3, respectively, and receives optical signals with different wavelengths (wavelengths are λ, λ5, and λ, respectively). Three electrical/optical converters to convert into 4. 42, 43 are arranged, and three optical multiplexers 5.5□, 53 receive all the optical signals of the three electrical/optical converters 41, 42, 43 and optically multiplex them.
are arranged.

On the other hand, on the receiving side, three optical demultiplexers 6.6.6 are arranged in one-to-one correspondence with each of the optical multiplexers 51.52.5, and each optical multiplexer 5.5, 52.3
Optical fibers 7.12'3 and optical demultiplexers 6, 6.63 are connected respectively. 7. Connected by 7. Further, each of the optical demultiplexers 6, 6, 63 has three optical/electrical converters corresponding to one of them, that is, one optical/electrical converter 81 corresponds to the optical demultiplexer 61.
a, 815, and 81o correspond to the optical demultiplexer 6, and optical/electrical converters 823 and 82b.

8 corresponds to the optical demultiplexer 63, and an optical/electrical C converter 8.8 corresponds to the optical demultiplexer 63. 8. 3a so that 8 corresponds to each
3b 3C, each optical demultiplexer 6, 62, 63
The optical signal demultiplexed by the optical demultiplexer is configured to be individually photoelectrically converted by three optical/electrical converters corresponding to the respective optical demultiplexers.

Next, the operation of this redundant multiplex optical transmission system will be explained. Each electrical/optical converter 4.4 on the transmitting side.

4, the transmission signal Sr inputted to ST2. ST3 includes each electrical/optical converter 4. 42. Wavelength λ by 43
,λ,λ. are converted into optical signals b respectively. Each of the next-stage optical multiplexers 51, 52, and 53 receives the wavelengths λ, λ, and λ, respectively. All of the optical signals b are input, and an optical signal obtained by optically multiplexing these signals is output. These optical signals are transmitted through optical fibers 71, 72 .
73 and is input to each corresponding optical demultiplexer 61°6□, 63. In each optical demultiplexer 61, 62° 63, the input optical signal is divided into its original wavelengths λ8°λ, λ. The optical signals of each wavelength are sent to each optical demultiplexer 6. 6. The signal is input to three optical/electrical converters arranged in correspondence with each other. That is, the three optical signals demultiplexed by the optical demultiplexer 61 are inputted separately to the optical/electrical converters 81a, 81.5, and 81C according to their wavelengths, and are demultiplexed by the optical demultiplexer 62. The three optical signals are sent to optical/electrical converters 823, 82b, 8
The three optical signals inputted separately to the optical demultiplexer 63 and split by the optical demultiplexer 63 are sent to the optical/electrical converter 833.
, 83b, and 83c, respectively. As a result, the optical/electrical converter 58,8.8 converts the received output signal 5R corresponding to the transmitted signal ST1 into an optical signal of wavelength λ8.
1a, SR2, SR3, are output respectively, and the light/N
Electrical converter, 8 8, 1a 2 of wavelength λゎ
b.3b The reception output signals SRSR, SR3, corresponding to the transmission signal ST2, which are converted into optical signals, are also optical/1b.2
b Wavelength λ for electrical converters 81C982c and 83o. Reception output signals 5R1o, SR, and 5R3C corresponding to the transmission signal ST3, which are converted into optical signals of C, are output, respectively.

Here, even if the electrical/optical converter 41 fails, the wavelength λ, by the electrical/optical converter 4.43.

Since the optical signal of λ0 is valid, on the receiving side, the optical/electrical converters 81b, 82b, 835, 81o, 82C183° generate received power signals SRSRSR5R1c, 5R2o corresponding to the transmitted signals s"r, s"r3.

lb' 2b・3b・S R
3c is obtained. In addition, an electric/optical converter 41 and an optical multiplexer 5
Even if it is assumed that □ is released, the wavelengths λb and λ. The optical signals are valid and are transmitted to the receiving side via optical fibers 71, 73, and optical/electrical converters 81b, 835, 81c, 8
3C, the transmission signal ST2. A received output signal SRSR33lb=3b=R1c, 5R3c corresponding to King S is obtained.

This redundant multiplex optical transmission system can be used in communication systems that require high reliability, such as public communications, aircraft, and self-defense ships, and can achieve great effects. By dispersing equipment such as optical multiplexers, optical demultiplexers, and optical fiber installations, the system can function effectively even if the port side is destroyed by an explosion, as long as the central and starboard systems survive. This contributes to the maintenance of communication systems.

(Effects of the Invention) As described above, according to the redundant multiplex optical transmission system of the present invention, even if a failure occurs in some components of the system, the multiplex redundancy function is still maintained, resulting in high reliability. This has the effect that the following can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a redundant multiplex optical transmission system which is an embodiment of the present invention, and FIG. 2 is a block diagram of a conventional example. 41-43... Electric/optical converter, 51-53... Optical multiplexer, 61-63... Optical demultiplexer, 71-73... Optical fiber,

Claims (1)

[Claims] (1) A plurality of electrical/optical converters each receiving a transmission signal and converting it into an optical signal of a different wavelength, and a plurality of electrical/optical converters receiving all of the optical signals from each of the electrical/optical converters and optically multiplexing them. a plurality of optical demultiplexers that are connected one-to-one to each of the optical multiplexers via optical fibers and optically demultiplex optical signals from the optical multiplexers, and one optical demultiplexer. A redundant multiplex optical transmission system comprising: optical/electrical converters that are provided in correspondence with the number of electric/optical converters for each optical demultiplexer and individually photoelectrically convert optical signals demultiplexed by the optical demultiplexer.