JPS5926109B2 - Optical fiber fusion splicer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fusion splicing device using gas discharge for splicing optical fiber cores.

. In order to realize a communication system using optical fiber cables, it is most important to establish a connection technology for thin glass fiber cores with a diameter of about several hundred micrometers. Fusing optical fiber cores using heat from gas discharge.

This connection method is considered to be a practical and promising connection method because the transmission loss at the connection part is small and the reliability after connection is high. However, this type of device, which has been developed for practical use, uses a motor generator to supply AC 100 V as a power source for the device in commercial power sources or locations where commercial power sources cannot be used. Also the first
Figure 2 shows the discharge circuit, Figure 2 A shows the voltage between the electrodes during discharge, and Figure 2 shows the current. Voltage 1 of AC 100V is boosted to several thousand V by transformer 2, and sparks are generated between electrodes 3. A discharge was generated (at point . in Fig. 2), and after that, a resistor 4 was used to divide the voltage to the several hundred volts required to maintain the glow discharge. In such a device, it is essential to secure a device power source of 100 V AC, which has been a constraint on field work. In addition, the voltage of an AC 100V power supply tends to become unstable in the field, and a good connection may not be possible. Furthermore, since spark discharge and glow discharge are performed in the same transformer 2, the capacity of the transformer must be designed with sufficient margin, which has the drawbacks of deteriorating efficiency and increasing the size. Ta. In addition, in order to supply voltage to the lighting necessary for the device and the motor for operating the device, a separate transformer and rectifier from the transformer for the electrode power source is required, which has the disadvantage of making the device itself larger and heavier. was. In order to eliminate these drawbacks, the present invention aims to improve the efficiency of the power supply by configuring a power supply in which high voltage and low voltage are applied separately to the two discharge poles, and by providing a constant voltage circuit within the device. The purpose is to ensure a stable connection.
Furthermore, by using a storage battery or the like as a power source for the device, the purpose is to miniaturize the device and improve operational efficiency. Examples of the present invention will be described below.

FIG. 3 is a diagram showing the principle of the electrode power source of the present invention. Electrode power supply 5
The high voltage section 6 and the DC low voltage section T are connected to the electrode 3 through the switching section 8. To operate this, first a spark discharge is generated in the electrode 3 by the voltage of the high voltage part, and then a direct current is caused to flow from the low voltage part T to the electrode by the switching part 8. The switching section may be a switch mechanism 10 linked to a discharge start switch 9 as shown in FIG. 4, or a diode 11 and a high resistance 12 in the high voltage section 6 as shown in FIG.
It can be formed by a circuit that connects these in series. By configuring the high voltage and low voltage parts separately in this way, for example, the electrode power supply transformer, which conventionally had a capacity of 80 W (4 KV x 20 mA), can be changed to a transformer with a capacity of about 10 W (0.5 KV x 20 mA). It is possible to reduce the weight to about 1/8.

By using a piezoelectric cord, an ignition coil, a semiconductor high voltage generator, and a high voltage transformer in the high voltage section 6, a compact electrode power source can be constructed. FIG. 6 is a principle diagram showing an applied example of the present invention in which a constant voltage circuit 14 is provided in the fusing apparatus for driving the electrode power supply 5 and the apparatus.

15 is an output terminal for operating the device.

By providing the constant voltage circuit 14, the voltage adjusting resistor (16 in FIG. 1) of the conventional device becomes unnecessary, and stable discharge conditions can be set even when the device input power supply voltage fluctuates. As the constant voltage circuit, it is also possible to use a semiconductor element and incorporate it into the electrode power supply section 5, without hindering miniaturization of the device. Further, it is also possible to provide the constant voltage circuit only to the electrode power source. FIG. 7 shows another application example of a fusion splicing device configured to use a storage battery 17 as the device input power source.

If a DC power source using a storage battery is used, the drive motor 19 and lighting device 18 of the device can be operated without using a transformer, and the device can be configured to be extremely compact. Also,
The voltage boosting of the electrode power supply can also be made more compact than the conventional AC input, and the constant voltage circuit shown in FIG. 6 can be easily constructed. As explained above, the optical fiber fusion splicing device according to the present invention has the effect of reducing the size of the fusion device by increasing the efficiency and stabilization of the electrode power source, and improving efficiency by stabilizing the splicing work. be.

Further, by using a storage battery as the device input power source, it is possible to further downsize the device and simplify the connection work, which is extremely convenient when connecting work on a pole such as connecting an overhead cable.

[Brief explanation of the drawing]

Figure 1 is a discharge circuit diagram of a conventional fusion splicing device, Figure 2 A,
The opening indicates the voltage and current between the discharge electrodes. Fig. 3 is a diagram showing the principle of construction of the electrode power supply according to the present invention, and Figs. 4 and 5 are diagrams showing high voltage. Embodiments of the low voltage switching section, FIGS. 6 and 7, show examples of application of the present invention. 1...Input voltage, 2...Transformer, 3...Electrode, 4
...Resistance, 5...Electrode power supply, 6...
...High voltage section, 7...DC low voltage section, 8...
...Switching unit, 9...Discharge start switch, 1
0: Switch mechanism, 11: Diode, 12: High resistance, 14: Constant voltage circuit, 15: For device operation output terminal, 16
. . . Voltage adjustment resistor, 17 . . . Storage battery, 18 . . . Lighting device, 19 . . . Device drive motor.

Claims (1)

[Claims] 1. A fusion splicing device for optical fiber cores using gas discharge, characterized by being equipped with a power source that can individually apply a high voltage of several thousand volts and a low DC voltage of several hundred volts to the same discharge electrode. Optical fiber fusion splicing equipment.