A method for detecting bending loss of optical fiber ribbon

Abstract

The invention discloses a method for detecting bending loss of an optical fiber ribbon, comprising: configuring detection equipment; testing an initial loss value; testing the bending loss value, winding the portion between the two ends of the optical fiber ribbon on a round rod for no more than 10 turns to obtain the bending loss value of each optical fiber from a strain tester; determining the bending loss value of the optical fiber ribbon, selecting the maximum bending loss value of the strain from the bending loss value of each optical fiber obtained as the bending loss test value of the detected optical fiber ribbon; the beneficial effects are: the bending loss of multiple optical fibers in the optical fiber ribbon can be detected simultaneously, making the invention simple and easy to implement, and the bending state of the optical fiber can be accurately and repeatedly simulated to provide a basis for accurate testing; the maximum bending loss value under the same environment can also be reflected, with a better inclusive effect, so that the detection value is more accurate.

Description

Technical Field

[0001] The invention relates to a method for detecting the performance of an optical fiber ribbon, and in particular to a method for detecting the bending loss of an optical fiber ribbon. Background Art

[0002] With the scarcity of pipeline resources and the increase in optical fiber density, the bending diameter of optical fiber ribbons during construction is getting smaller and smaller. In particular, the optical fiber ribbons leading out of devices have higher requirements for bending loss. Therefore, the performance detection of the bending loss of optical fiber ribbons is particularly important and the detection task is arduous.

[0003] Existing bending loss detection methods, such as the bending performance standard given by YD / T 979, have setting conditions that are difficult to achieve, and are prone to accidents during the detection process. They have poor repeatability and no practical operational value and are rarely used by optical fiber manufacturers. Therefore, in order to ensure the quality of optical fiber ribbons, it is necessary to provide a convenient and easy-to-operate optical fiber ribbon bending loss detection method. Summary of the invention

[0004] The present invention aims to solve the problems existing in the prior art and provide a method for detecting bending loss of optical fiber ribbons. The specific scheme is as follows: A method for detecting bending loss of an optical fiber ribbon comprises the following steps: 1) Configuration of a testing device, wherein the testing device comprises a strain tester, a round rod and a fiber optic ribbon having a plurality of optical fibers to be tested; 2) Testing the initial loss value, placing the optical fiber ribbon in a quiet environment, and splicing a plurality of optical fibers at both ends with the optical fiber pigtails on the strain tester, so as to obtain the initial loss value of each optical fiber from the strain tester; 3) Testing the bending loss value, winding the portion between the two ends of the optical fiber ribbon around a round rod for no more than 10 turns, so as to obtain the bending loss value of each optical fiber from the strain tester; 4) Determine the bending loss value of the optical fiber ribbon, and select the maximum bending loss value of the strain from the bending loss values ​​of each optical fiber as the bending loss test value of the optical fiber ribbon being tested.

[0005] Furthermore, the test light wavelength of the strain tester is 1550-1625 nm (or 1550 nm or 6125 nm).

[0006] Furthermore, the diameter of the round rod is 15-32 mm.

[0007] Furthermore, the quiet environment is a state in which the optical fiber ribbon is not subjected to vibration greater than 4.5 mm / s imposed by the environment.

[0008] Furthermore, the bending loss value of each optical fiber obtained from the strain tester is a value measured after several tests.

[0009] Furthermore, the number of tests is no less than 6 tests.

[0010] Furthermore, the detected optical fiber ribbon is a cut optical fiber ribbon with a length of not less than 10 m.

[0011] Furthermore, the optical fiber ribbon to be detected is an optical fiber ribbon wound on an optical fiber ribbon reel, and the length of the optical fiber ribbon unwound from the optical fiber ribbon reel is not less than 2 m.

[0012] The beneficial effects of the present invention are as follows: the present invention adopts a strain tester originally used for testing optical cables to simultaneously detect the bending losses of multiple optical fibers in an optical fiber ribbon, so that the present invention is simple and easy to implement, more adaptable to heavy detection tasks, and has high testing efficiency; the present invention also winds the optical fiber ribbon on a round rod of a set diameter with no more than 10 winding circles, so that the method of the present invention is easier to implement and can accurately and repeatedly simulate the bending state of the optical fiber, providing a basis for accurate testing; the present invention also selects the maximum value of the bending loss data generated by multiple optical fibers in the optical fiber ribbon as the bending loss value of the optical fiber ribbon, so that its value can better reflect the maximum bending loss value under the same environment, has a more inclusive effect, and is therefore more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the implementation of Example 1 of the method of the present invention.

[0014] Figure 2 This is a schematic diagram of the implementation of Example 2 of the method of the present invention.

[0015] In the figure: 1 is a strain tester, 2 is a fiber pigtail on the strain tester, 3 is a fiber ribbon to be tested, 4 is a round rod, and 5 is a fiber ribbon reel. DETAILED DESCRIPTION

[0016] The present invention will be further described below in conjunction with the accompanying drawings. Embodiment 1

[0017] like Figure 1 As shown, this embodiment provides a method for detecting bending loss of an optical fiber ribbon, which specifically includes the following steps: Configuration of testing equipment, The detection equipment includes a strain tester, a round rod and a fiber optic ribbon with a plurality of optical fibers to be detected. The strain tester of this embodiment adopts PK2800 or CD400, the test light wavelength of the strain tester is set to 1550nm, the diameter of the round rod is 30mm or 32mm, the fiber optic ribbon to be detected is model G657A1, and the fiber optic ribbon is a fiber optic ribbon cut to a length of not less than 10m and has 12 optical fibers.

[0018] 2) Test initial loss value The above-mentioned optical fiber ribbon is placed in a quiet environment with a vibration frequency greater than 4.5mm / s, and several optical fibers at both ends of the optical fiber ribbon are respectively fused with the optical fiber pigtails on the strain tester, and then the strain tester is turned on to obtain the initial loss value of each optical fiber from the strain tester. The initial loss value will be offset in the later detection value.

[0019] 3) Test bending loss value After obtaining the initial loss value, the portion between the two ends of the optical fiber ribbon is wound around a round rod, and the number of turns around the round rod is 3. After the value stabilizes, 6 consecutive tests are performed. The strain value obtained from the strain tester for the 6th time is used as the bending loss value corresponding to each optical fiber.

[0020] 4) Determine the bending loss value of the optical fiber ribbon The maximum bending loss value of the strain is selected from the bending loss values ​​obtained for each optical fiber as the bending loss test value of the tested optical fiber ribbon. Embodiment 2

[0021] like Figure 2 As shown, this embodiment provides a method for detecting bending loss of an optical fiber ribbon, which specifically includes the following steps: 1) Configuration of testing equipment, The detection equipment includes a strain tester, a round rod and a fiber optic ribbon with a plurality of optical fibers to be detected. The strain tester of this embodiment adopts PK2800 or CD400, the test light wavelength of the strain tester is set to 1625nm, the diameter of the round rod is 15mm, the fiber optic ribbon to be detected is model G657A2, the fiber optic ribbon is a fiber optic ribbon wound on a fiber optic ribbon reel, and the length released from the fiber optic ribbon reel is not less than 2m, and the fiber optic ribbon has 12 optical fibers.

[0022] 2) Test initial loss value The above-mentioned optical fiber ribbon is placed in a quiet environment with a vibration frequency greater than 4.5mm / s, and several optical fibers at both ends of the optical fiber ribbon are respectively fused with the optical fiber pigtails on the strain tester, and then the strain tester is turned on to obtain the initial loss value of each optical fiber from the strain tester. The initial loss value will be offset in the later detection value.

[0023] 3) Test bending loss value After obtaining the initial loss value, the portion between the two ends of the optical fiber ribbon is wound around a round rod, and the number of turns around the round rod is 10. After the value stabilizes, six consecutive tests are performed. The strain value obtained from the strain tester for the sixth time is used as the bending loss value corresponding to each optical fiber.

[0024] 4) Determine the bending loss value of the optical fiber ribbon The maximum bending loss value of the strain is selected from the bending loss values ​​obtained for each optical fiber as the bending loss test value of the tested optical fiber ribbon.

Claims

1. A method for detecting bending loss of an optical fiber ribbon, characterized in that: The steps include: Configuration of a testing device, the testing device comprising a strain tester, a round rod and a fiber optic ribbon having a plurality of optical fibers to be tested; Testing the initial loss value, placing the optical fiber ribbon in a quiet environment, and fusing a plurality of optical fibers at both ends with optical fiber pigtails on a strain tester, respectively, to obtain the initial loss value of each optical fiber from the strain tester; Testing the bending loss value, winding the portion between the two ends of the optical fiber ribbon around a round rod for no more than 10 turns, so as to obtain the bending loss value of each optical fiber from a strain tester; The bending loss value of the optical fiber ribbon is determined by selecting the maximum bending loss value of the strain from the bending loss values ​​of each optical fiber as the bending loss test value of the optical fiber ribbon being tested.

2. The optical fiber ribbon bending loss detection method according to claim 1, characterized in that: The test light wavelength of the strain tester is 1550nm or 6125nm.

3. The optical fiber ribbon bending loss detection method according to claim 1, characterized in that: The diameter of the round rod is 15-32 mm.

4. The optical fiber ribbon bending loss detection method according to claim 1, characterized in that: The quiet environment means that the optical fiber ribbon is not subjected to vibration greater than 4.5 mm / s imposed by the environment.

5. The optical fiber ribbon bending loss detection method according to claim 1, characterized in that: The bending loss value of each optical fiber obtained from the strain tester is a value measured after several tests.

6. The optical fiber ribbon bending loss detection method according to claim 5, characterized in that: The several tests are no less than 6 tests.

7. The optical fiber ribbon bending loss detection method according to claim 1, characterized in that: The optical fiber ribbon to be tested is a cut optical fiber ribbon with a length of not less than 10 m.

8. The optical fiber ribbon bending loss detection method according to claim 1, characterized in that: The optical fiber ribbon to be tested is an optical fiber ribbon wound on an optical fiber ribbon reel, and the length of the optical fiber ribbon unwound from the optical fiber ribbon reel is not less than 2m.

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