JPH1164691A - Noncut clip - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to take light signals out of the optical fibers in a coating layer and to input the external light signals into the optical fibers in the same manner as with the conventional uncut clip in spite of an optical fiber ribbon having the plural optical fibers and to align the desired optical fiber among plural pieces of the optical fibers with a local detection function or local injection function. SOLUTION: This clip is constituted by holding the optical fiber ribbon 2 with a holding part 3 and forming a local bent part 4 in mid-way of the ribbon 2. When the bent part 4 is brought into contact with or proximity to an optical contact part 5 having light receiving and light emitting elements, the optical fibers 1 of the held optical fiber ribbon 2 and the light receiving and light emitting elements of the optical contact part 5 are optically coupled and the propagated light signals are received in the optical fibers 1 in the optical fiber ribbon 2 or the external signals are inputted to the optical fibers 1 without cutting the optical fiber ribon 2. In such a case, the clip have a slide adjuster 6 capable of sliding both or either of the holding part 3 and the optical contact part 5 in the transverse direction of the flat optical fiber ribbon 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for receiving an optical signal transmitted to the outside of an optical fiber by simply sandwiching the optical fiber without cutting the optical fiber, for example, when talking with the outside through an optical fiber. The present invention relates to an uncut clip that enables an external signal to be input to an optical fiber as an optical signal or the like, and particularly when an optical fiber tape in which two or more optical fibers are arranged in parallel is clipped, The optical fiber can be positioned at a predetermined position.

[0002]

2. Description of the Related Art In the laying work, maintenance and maintenance work of an optical fiber cable, it is necessary to check the communication state of the optical fiber cable or to perform communication when there is no other communication means in a cave or the like. In some cases, communication and telephone conversation are performed using an optical fiber in the obtained optical fiber cable. In this case, without cutting the optical fiber, receiving an optical signal propagated through the optical fiber, or inputting and transmitting an external signal to the optical fiber, and transmitting to another optical fiber connected to the optical fiber. 2. Description of the Related Art There is a technology that enables communication and communication with a communication device. FIG. 3 is an explanatory view showing the principle of such a non-cutting optical communication system, and FIG.

[0003] In the non-cut optical communication system shown in FIGS. 3 and 4, a master unit B connected to a starting end a of an optical fiber (general single-core optical fiber) A and a master unit B attached in the middle of the optical fiber A are shown. A cutting clip (sometimes called a tap) C;
In this case, the end b of the optical fiber A is looped back to the master unit B in order to transmit the signal of the slave unit D to the master unit B. Base unit B FM-modulates the sound input to microphone F of headset E, performs E / O conversion (electric / optical conversion),
The sound of the microphone F can be input as an optical signal to the start end a of the optical fiber A, while the optical signal emitted from the end b of the optical fiber A passes through the analyzer H and then undergoes O / E conversion (optical / optical conversion). Electrical conversion), FM demodulation, and an optical signal propagated through the optical fiber A can be output as audio to the speaker I of the headset E. The uncut clip C is attached to the outside of the optical fiber A without cutting the optical fiber A in the middle of the optical fiber A, and a portion for holding the optical fiber A in a bent state receives an optical signal leaking from the bent portion. A local detection device J that converts the optical signal into an electric signal is attached, and a piezoelectric element K that deforms the optical fiber A by being driven by an external signal is attached to a portion that maintains the linear state. Receiving the optical signal to be transmitted by the local detection device J, or transmitting the external signal to the optical fiber A by driving the piezoelectric element K with the external signal and modulating the propagation light of the optical fiber A with the polarization plane. Can be. The slave unit D can FM-demodulate the signal received by the local detection device J of the uncut clip C and output this as audio from the speaker I of the headset E. Can be FM-modulated, converted into an ultrasonic signal by an ultrasonic generation circuit, and applied to the piezoelectric element K of the uncut clip C.

In a conventional non-cutting optical communication system, a non-cutting clip includes a local injection device instead of the piezoelectric element, converts a voice signal of a slave unit into light, and directly converts the optical signal to an optical fiber. Some are made available for output. FIG. 5 shows an example of a non-cutting clip used in such a non-cutting optical communication system, in which light is transmitted between two fiber guides L having V-shaped receptacles of a holding portion N and a cylindrical head M. When the fiber A is sandwiched, the fiber A is held in a curved state, and when the lever O is tilted downward in this state, the optical contact on the upper surface of the box P in which the bay local part of the held optical fiber A is located below. The optical fiber A is in optical contact with the local detection device (the circuit including the light receiving element) and the local injection device (the circuit including the light emitting element) of the optical contact portion Q, and contacts the optical fiber A. , And the optical signal of the slave unit D can be input to the optical fiber A and transmitted to the master unit B. The arrow on the side of the box P having the optical contact portion Q indicates the direction of light emission by the local injection device.
The signal can be transmitted directly to the side, and there is no need to loop back the end of the optical fiber A to the master side as in the communication system of FIG.

[0005] By the way, such a non-cut clip C is
It is assumed that the optical fiber A to be clipped is single-core and round. In this case, if the optical fiber A is sandwiched between the fiber guide L and the head M as shown in FIG. Is set in place
The optical contact portion Q is always contacted at the same position. That is, the optical fiber A is always optically coupled at the same position as the local detection device or the local injection device of the contact portion Q. By the way, conventional 0.25mm UV coated single core wire (SM) and 2.4 core UV
Single core optical fibers, such as coated single core (SM), have been used for uncut optical communications.

[0006]

The non-cutting clip C shown in FIG. 5 is suitable for clipping a single-core round optical fiber A. However, the number of optical fibers A shown in FIG. A problem arises when clipping the bundled optical fiber tape T. FIG. 7 is a cross-sectional view of the optical fiber tape T. In the optical fiber tape T, the coating material S has a relatively large thickness variation, and is approximately 10 mm in the width direction.
A variation of ± several tens of μm occurs for a thickness of 0 μm. Due to this variation, even if the optical fiber tape T is set in the V-shaped receptacle of the fiber guide L, the desired optical fiber A cannot be matched with the local detection device and the local injection device, and a good optical fiber Can not get a strategic connection. That is, the quality of the call deteriorates or the call becomes impossible.

[0007]

SUMMARY OF THE INVENTION According to the present invention, an optical fiber tape having a plurality of optical fibers can be used to extract an optical signal from an optical fiber in a coating layer as in a conventional uncut clip, or to provide an external optical signal to the optical fiber. Or to input a desired optical fiber of the plurality of optical fibers to a local detection function or a local injection function. .

As shown in FIG. 1, the non-cutting clip according to the first aspect of the present invention holds a middle part in the longitudinal direction of an optical fiber tape 2 in which two or more optical fibers 1 are arranged in parallel with a holding part 3. It is possible to form a local bent portion 4 in the middle of the optical fiber tape 2 by using the optical fiber tape 2. When the bent portion 4 comes into contact with or comes close to the optical contact portion 5 having the light receiving / emitting element, the holding portion 3 The held optical fiber 1 of the optical fiber tape 2 and the light receiving / emitting element of the optical contact part 5 are optically coupled to each other, and the optical signal propagated in the optical fiber tape 2 can be transmitted without cutting the optical fiber tape 2. An uncut clip capable of receiving and inputting an external signal into the optical fiber tape 2. The clip is used to connect the holding unit 3 and / or the optical contact unit 5 to a flat optical fiber. Fiber tape 2 Those comprising a slide adjusting device 6 that can slide in the width direction.

As shown in FIG. 1, in the non-cut clip according to the second aspect of the present invention, the optical contact portion 5 has a local light receiving element capable of receiving light leaking from the bent portion 4 of the optical fiber tape 2. It has a detection function and a local injection function including a light emitting element capable of inputting an optical signal to the bent portion 4 of the optical fiber tape 2.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment of a non-cutting clip according to the present invention. A flat base table 10 is provided with a box 11 having a flat top surface and an open window at the top. An operation lever 12 that is rotatable in the directions indicated by arrows ef in the figure is mounted on a horizontal base 10. Box 1
A box 1 includes a local detection device having a light receiving element and a local injection device having a light emitting element (both are not shown).
The window on the upper surface of 1 is an optical contact portion 5 for optically coupling these devices and the optical fiber tape 2. A lead 13 from the local detection device and the local injection device protrudes from the end of the box 11, and a slave unit as shown in FIG. 2 can be connected to the lead 13. Operation lever 1
2 is provided with a holding portion 3 which can hold the optical fiber tape 2 in a partially bent state while holding the optical fiber tape 2. The holding portion 3 is an optical fiber tape held when the operation lever 12 is turned down. The bent portion 4 of FIG.
So that it can be brought into contact with

The holding section 3 comprises two fiber guides 14 having V-shaped receivers and a roll-shaped head 15 provided between the two fiber guides 14. The intermediate portion of the optical fiber tape 2 supported by the mold receiver is pushed out to the receiving side of the fiber guide 14 to fix the optical fiber tape 2 so as not to move, and the optical fiber tape 2 is moved along the outer diameter of the head 15. The optical fiber tape 2 is bent so that a bent portion 4 having a desired curvature can be created. The head 15 of the holding unit 3 is rotated by turning a micrometer (slide adjusting tool) 6 provided as shown in FIG. 1 in the directions of arrows ab in FIG. d
It is designed to be able to slide by a small amount in the direction. In this case, since the wide surface of the optical fiber tape 2 held by the holding portion 3 is in contact with the outer peripheral surface of the head 15, when the head 15 slides in the direction of the arrow cd,
The head 15 slides in the width direction of the optical fiber tape 2 (the direction of arrangement of the optical fibers in the coating layer), and the optical fiber tape 2 slides in the width direction by a desired amount in units of about μm. Appropriate protrusions or grooves are formed on the outer peripheral surface of the head 15 or the head is inverted barrel-shaped (the center is thin and both ends are thick).
For example, when the head 15 slides, the optical fiber tape 2 is preferably slid in the width direction.

A large arrow is displayed on the side of the box 11, the local injection device in the box 11 outputs an optical signal in this direction, and the local detection device receives the optical signal in this direction. can do.

In the non-cut clip of the present invention, the slide of the optical fiber tape may be performed as follows. 1. The head 15 of the holding part 3 is fixed, and
Are slidable in the width direction of the optical fiber tape 2. 2. The head 15 and the fiber guide 14 of the holding unit 3 are both slidable in the width direction of the optical fiber tape 2. 3. The head 15 and the fiber guide 14 of the holding unit 3 are fixed, and the box 11 side can be slid in the width direction of the optical fiber tape 2 instead. In this case, box 11
The whole may be slid or only the optical contact part 5 may be slid. 4. A configuration combining the above 1 to 3 may be used.

In the non-cut clip shown in FIG. 1, the holding portion 3 has a structure including the fiber guide 14 and the head 15,
The present invention is not limited to this. In short, various structures can be employed that can hold the optical fiber tape 2 without cutting it, and can form the bent portion 4 having a predetermined curvature at the held position. Further, in this case, the slide adjusting tool 6 can be made appropriate in accordance with the structure of the holding section 3.

[0015]

[Application example] An uncut optical communication using the uncut clip shown in FIG. 1 will be described with reference to a simple example shown in FIG. 1. With the arrow displayed on the side surface of the box 11 facing the parent device as the other party of the call, a non-cut clip is placed at an intermediate position in the longitudinal direction of the laid optical fiber tape 2. 2. The fiber guide 14 is attached to the holding portion 3 of the uncut clip.
The optical fiber tape 2 is set with the bent portion 4 provided in the fiber tape 2 with the optical fiber tape 2 interposed between the optical fiber tape 2 and the head 15. 3. The operation lever 12 is turned in the direction of arrow f in the figure. In this case, the operation lever 12 is fixed at a predetermined angle by a lock mechanism (not shown), and in this state, the bent part 4 of the optical fiber tape 2 of the holding part 3 comes into contact with the optical contact part 5. 4. The slave unit is connected to the lead wire 13 of the uncut clip, and a call with the master unit is attempted through the headset of the slave unit. Then, while operating the micrometer 6, an optical coupling position at which communication with the master unit is best is found. Usually 1, 2
You can find the right position in minutes, and get used to it faster if you get used to it. Thereafter, a call is made with the master unit.

[0016]

According to the non-cut clip of the present invention, the following effects can be obtained. 1. By adjusting the slide adjusting tool 6, good communication can be performed even with a multi-core optical fiber tape, and the time required for the adjustment is as short as 1, 2 minutes or less. 2. Because of the local injection function, it is possible to talk with the master unit even if the optical fiber tape is not looped back to the master unit. 3. Since a call can be made regardless of the type of optical fiber and the presence or absence of loopback of the optical fiber, the call can be made with almost all existing optical fibers.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a non-cutting clip according to the present invention.

FIG. 2 is an explanatory diagram showing a call example using the non-cut clip shown in FIG. 1;

FIG. 3 is a diagram illustrating the principle of a conventional non-cut optical communication system.

FIG. 4 is a configuration diagram of the non-cut optical communication system of FIG. 3 in a use state;

FIG. 5 is a perspective view of a non-cutting clip used in a conventional non-cutting optical communication system, and is an example of a clip having a local detection function and a local injection function.

FIG. 6 is an explanatory view of a single-core optical fiber supported by a fiber guide of the non-cut clip of FIG. 5;

FIG. 7 is a sectional view of an optical fiber tape.

FIG. 8 is an explanatory view of an optical fiber tape supported by a fiber guide of the non-cut clip of FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Optical fiber 2 Optical fiber tape 3 Holding part 4 Bending part 5 Optical contact part 6 Slide adjustment tool

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification symbol FI H04B 10/13 10/12 (72) Inventor Haruki Ogoshi 2-6-1 Marunouchi, Chiyoda-ku, Tokyo Inside Furukawa Electric Co., Ltd. (72) Inventor Nobuo Ogasawara 3-19-2 Nishi-Shinjuku, Shinjuku-ku, Tokyo Nippon Telegraph and Telephone Corporation (72) Inventor Shozo Ishikawa 3-19-2 Nishi-Shinjuku, Shinjuku-ku, Tokyo Nippon Telegraph and Telephone Corporation (72 ) Inventor Yoshimi Sasaki 3-19-2 Nishi-Shinjuku, Shinjuku-ku, Tokyo Nippon Telegraph and Telephone Corporation (72) Inventor Yukio Mikami 3-19-2 Nishi-Shinjuku, Shinjuku-ku, Tokyo Nippon Telegraph and Telephone Corporation

Claims (2)

[Claims] An optical fiber tape (2) in which two or more optical fibers (1) are arranged side by side is held in a longitudinal direction in a holding part (3) and locally located in the optical fiber tape (2). It is possible to make a typical bent portion (4), and to receive the bent portion (4), an optical contact portion (5) provided with a light emitting / receiving element.
When the optical fiber (1) of the optical fiber tape (2) held by the holding part (3) is brought into contact with or close to the optical fiber, the light receiving / emitting element of the optical contact part (5) is optically coupled,
An uncut clip that can receive a propagated optical signal in the optical fiber tape (2) without cutting the optical fiber tape (2) or input an external signal into the optical fiber tape (2) The clip includes a slide adjusting tool (6) that allows both or one of the holding part (3) and the optical contact part (5) to slide in the width direction of the flat optical fiber tape (2). An uncut clip characterized by comprising: 2. The optical contact section (5) has a local detection function provided with a light receiving element capable of receiving light leaking from a bent section (4) of the optical fiber tape (2), and an optical contact section of the optical fiber tape (2). The clip according to claim 1, further comprising a local injection function including a light emitting element capable of inputting an optical signal to the bending portion (4).