JPH02253731A - Optical interface cable - Google Patents

Abstract

PURPOSE:To lower cost and to improve usability by providing a power supply line between connectors in the both ends of an optical interface cable, providing a power supply part in one of the connectors as mentioned above and supplying power to an optical/electric converter or to an electric/optical converter. CONSTITUTION:A power supply line 13 is composed of a GND line and a +5V line, for example. The power is supplied from a power source for domestic use, for example, to a power supply part 133 provided in a first connector 21. For this supplied power, a noise is cut off by an electric field capacitor and a capacitor and the prescribed power is supplied to an optical/electric conversion circuit and an electric/optical conversion circuit in the first connector. Further, this supplied power is passed through noise filters 131 and 132 and the prescribed power is supplied to the electric/optical conversion circuit and optical/electric conversion circuit in a second connector 22. Accordingly, it is not necessary to respectively provide the power supply sources being used to the conventional device to the connectors in the both ends of the optical interface cable but it is enough to provide the power supply source only in one connector.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to an optical interface cable that converts a transmission signal from electrical to optical or optical to electrical and transmits it between devices using an optical fiber. As this lightning interface cable, the applicant disclosed an optical interface cable as shown below in Japanese Patent Application No. 1-44282.

This interface cable is an optical fiber that connects devices. An electrical-to-optical conversion element for converting electrical signals into optical signals is glued to one end with transparent adhesive, and the other end converts optical signals into electrical signals. A light-to-electricity conversion element for converting the signal into a signal is bonded with a transparent adhesive, and the electricity-to-light conversion element is coupled to a signal providing part for giving an electric signal, and On the other hand, the photoelectric conversion element is configured to be coupled to a signal extraction section that extracts an electric signal.

Optical fibers configured in this manner are provided at least as many times as there are signals to be transmitted, and the signal applying portions of each of these optical fibers are connected to the signal output portion of the transmitting device, and the signal extracting portions of these optical fibers are connected to the signal output portion of the receiving device. It is configured to be connected to the signal input section.

A plurality of optical fibers are provided corresponding to the plurality of signals to be transmitted, and an electric-to-optical conversion element is directly attached to one end of each of these optical fibers, and an optical-to-electrical conversion element is attached to the other end with a transparent adhesive. , there is no need for a discrimination circuit for reconverting the signals into a large number of signals, which are each coupled with a signal applying section to the electro-optical conversion element and a signal extraction section to the photo-electrical conversion element.

[Problem that the invention seeks to solve]

By the way, this type of optical interface cable must supply power to the above-mentioned electrical-to-optical converter or optical-to-electrical converter.

There are generally two conventional power supply systems for this type of interface cable.

In the first method, the power to the electrical-to-optical converter on the side of the optical interface cable connected to the transmitting side device is extracted from the transmitting side device, and the power to the optical-to-electrical converter on the side of the optical interface cable connected to the receiving side device is extracted from the transmitting side device. The configuration is such that the power for the receiver is extracted from the receiving device.

In this first method, it is necessary to provide power extraction bins at the connectors at both ends of the optical interface cable, and to provide power supply bins for the transmitting and receiving devices, respectively, resulting in a simple device configuration. There were some notable flaws.

The second method is a method in which power supply sections are provided at connector sections at both ends of the optical interface cable.

In this system, each connector was supplied with power from a household power source via an adapter. Although the above-mentioned problems of the first method have been improved, there is a drawback that two adapters must be provided.

The present invention has been made in view of these points, and aims to provide an optical interface cable that is easy to use and is related to improvements in the various problems mentioned above.

[Means for solving problems]

Therefore, in the present invention, a power supply line is provided between the connectors at both ends of the optical interface cable, and a power supply section is provided in one of the connectors.

[Effect]

Power from a power supply line provided in one of the two connectors is passed between both connectors while supplying power to an electrical-to-optical converter or an optical-to-electrical converter provided in that connector. The power supply line is led to the other connector and supplies power to an optical-to-electrical converter or an electric-to-optical converter provided in the other connector.

〔Example〕

1 to 3 show an embodiment of the optical interface cable according to the present invention. FIG. 1 is an overall configuration diagram thereof, FIG. FIG. 3 is a sectional view showing an example of the arrangement of this optical interface cable.

First, an optical interface cable related to the present invention will be explained with reference to FIG.

In FIG. 1, 11 is a first optical fiber group;
A signal is transmitted from the second connector 21 side to the second connector 22 side. A second optical fiber group 12 transmits signals from the second connector 22 side to the first connector 21 side. 1
15 is a signal input section to the first optical fiber group 11;
6 is a signal output section from the first optical fiber group 11, 12
5 is a signal input section to the second optical fiber group 12; 126;
13 is a signal output section from the second optical fiber group 12, 13 is a power supply line, 131.132 is a noise filter, 133
is the power supply section.

The first optical fiber group 11 receives signals from the signal output section (not shown) of the first device via the respective signal input section 115 of the first connector 21 . This signal is
Resistor R, transistor Tr, diode D and electricity
The light is converted into an optical signal by the optical conversion element 111 and sent to the first optical fiber group 11.

The optical signal of the first optical fiber group 11 is transmitted through the optical
It is converted into an electrical signal by the electrical conversion circuit and sent to the second connector 2.
The signals are output to a signal input section (not shown) of the second device via the respective signal output sections 116 of the second device.

Regarding the second optical fiber group 12, the only difference is that the signal transmission direction is opposite to that of the first optical fiber group 11, and the other functions are the same.

The power supply line 13 includes a GND line and, for example, a +5V line. Power is supplied to the power supply unit 133 provided in the first connector 21 from, for example, a household power supply via an adapter (not shown). As shown in FIG. 2, this supplied power is noise-cut by an electrolytic capacitor and a capacitor, and a predetermined power is supplied to the optical-to-electrical conversion circuit and the electric-to-optical conversion circuit in the first connector 21. , this supplied power is transmitted to the first connector 21
Noise filter 13L, 1 inside and second connector 22
32, a predetermined power is supplied to the electrical-to-optical conversion circuit and the optical-to-electrical conversion circuit in the second connector 22.

FIG. 3 shows an example of the arrangement of each cable line of this optical interface cable. Thirteen (+5V) lines are provided. These (G
A group of optical fibers is provided between the ND) line and the (+5v) line. Note that these are insulated from each other. In addition to this arrangement, it is also possible to arrange the pair of power supply lines 13 in the center and arrange the optical fibers around the pair.

In the above description, the power supply section 13 of the first connector 21
Although the configuration in which power is supplied from a household power source via an adapter has been described in 3, the power supply section 133 may include a built-in battery. In particular, by using a secondary battery and configuring it to be charged as necessary, it is possible to obtain an optical interface cable that is more convenient to use.

〔Effect of the invention〕

As described above, according to the present invention, there is no need to provide a power supply source for each connector at both ends of an optical interface as in conventional devices, but it is only necessary to provide a power supply source for either one of the connectors, thereby reducing costs. possible, and can improve usability.

[Brief explanation of drawings]

1 to 3 show an embodiment of the optical interface cable according to the present invention. FIG. 1 is an overall configuration diagram thereof, FIG. FIG. 3 is a sectional view showing an example of the arrangement of this optical interface cable. 11--first optical fiber group m, 2-second optical fiber group 13-power supply line

Claims (1)

[Scope of Claims] An optical interface cable that converts an electrical signal into an optical signal and transmits a signal, the cable having an electrical-to-optical conversion element for converting the electrical signal into an optical signal at one end, and an optical interface cable at the other end. - an optical fiber having an electrical conversion element; an electrical-optical conversion circuit that holds the optical fiber and couples it to the electrical-optical conversion element to convert an electrical signal into an optical signal; and an electrical-optical conversion circuit coupled to the optical-electrical conversion element; A pair of connectors each having an optical-to-electrical conversion circuit for extracting an electrical signal, and a power supply section provided in either of the pair of connectors, and the power supply section supplies power to the optical-to-electrical conversion circuit or electricity of the connector from the power supply section. - An optical interface cable in which power is supplied to the optical conversion circuit, and power is supplied to the electrical-to-optical conversion circuit or optical-to-electrical conversion circuit of the other connector via the power supply line that connects both connectors. .