Optical connector connection determining device

Abstract

To determine the quality of connection of an optical connector.SOLUTION: The optical connector connection determining apparatus includes a 1.5 μ F1a for introducing a connection checking laser beam into an input optical fiber mLD14, a connection checking laser beam extraction unit 17 for extracting the connection checking laser beam from the extraction optical fiber F1d, a connection determining unit 18 for determining whether the connection between the first optical connector 12 and the second optical connector 22 is good or bad based on the connection checking laser beam extracted by the connection checking laser beam extraction unit 17, a first connection checking laser beam applying unit F1b - c for receiving the connection checking laser beam from the intermediate optical fiber F1c and applying the connection checking laser beam to another intermediate optical fiber 19a, and second connection checking laser beam applying units F2a, F2c, F2b for receiving the connection checking laser beam from one second optical fiber () and applying the connection checking laser beam to another second optical fiber (). 26b F2d 26c 26a 24a 24c 24b.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to determining the connection of an optical connector. [Background technology]

[0002] Conventionally, monitoring for breakage of optical fibers (see, for example, Patent Document 1), fault detection of optical lines (see, for example, Patent Document 2), and fault detection of pumping light sources (see, for example, Patent Document 3) have been known. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2006-033442 [Patent Document 2] Japanese Patent Application Laid-Open No. 2009-103526 [Patent Document 3] Japanese Patent Application Laid-Open No. 2003-042899 Summary of the Invention [Problem to be solved by the invention]

[0004] However, although optical transmission failures can also occur due to causes other than those mentioned above (for example, a faulty optical connector), the above-mentioned conventional techniques cannot detect a faulty optical connector.

[0005] Therefore, an object of the present invention is to determine whether the connection of an optical connector is good or bad. [Means for solving the problem]

[0006] The optical connector connection determination device according to the present invention includes a first optical connector that holds a first optical fiber, a second optical connector that holds a second optical fiber to be connected to the first optical fiber and is connected to the first optical connector, a connection confirmation laser light source that outputs connection confirmation laser light used to confirm the connection between the first optical connector and the second optical connector, a connection confirmation laser light introduction unit that introduces the connection confirmation laser light into an introduction optical fiber that is one of the first optical fibers, a connection confirmation laser light extraction unit that extracts the connection confirmation laser light from an extraction optical fiber that is one of the first optical fibers other than the introduction optical fiber, and the connection confirmation laser light extracted by the connection confirmation laser light extraction unit. a first connection confirmation laser light providing unit that receives the connection confirmation laser light from an intermediate optical fiber among the first optical fibers that is neither the introduction optical fiber nor the extraction optical fiber, and provides it to another intermediate optical fiber; and a second connection confirmation laser light providing unit that receives the connection confirmation laser light from one of the second optical fibers, and provides it to another second optical fiber, and is configured so that the connection confirmation laser light passes through all of the portion of the first optical fiber that is held by the first optical connector and all of the portion of the second optical fiber that is held by the second optical connector.

[0007] In the optical connector connection determination device configured as described above, a first optical connector holds a first optical fiber. A second optical connector holds a second optical fiber to be connected to the first optical fiber and is connected to the first optical connector. A connection confirmation laser light source outputs a connection confirmation laser light used to confirm the connection between the first optical connector and the second optical connector. A connection confirmation laser light introducing unit introduces the connection confirmation laser light into an introduction optical fiber, which is one of the first optical fibers. A connection confirmation laser light extracting unit extracts the connection confirmation laser light from an extraction optical fiber, which is one of the first optical fibers other than the introduction optical fiber. A connection determining unit determines whether the connection between the first optical connector and the second optical connector is good or bad based on the connection confirmation laser light extracted by the connection confirmation laser light extracting unit. A first connection confirmation laser light applying unit receives the connection confirmation laser light from an intermediate optical fiber, which is neither the introduction optical fiber nor the extraction optical fiber, among the first optical fibers, and applies it to another intermediate optical fiber. a second connection-checking laser light applying unit that receives the connection-checking laser light from one of the second optical fibers and applies it to another of the second optical fibers, and the connection-checking laser light passes through the entire portion of the first optical fiber that is held by the first optical connector and the entire portion of the second optical fiber that is held by the second optical connector.

[0008] In the optical connector connection determining device according to the present invention, laser light having a wavelength different from that of the connection confirming laser light may also pass through the first optical fiber and the second optical fiber.

[0009] In addition, the optical connector connection determination device of the present invention may be configured so that the connection confirmation laser light introduction section multiplexes the connection confirmation laser light and the different wavelength laser light, and the connection confirmation laser light extraction section demultiplexes the connection confirmation laser light and the different wavelength laser light.

[0010] In the optical connector connection determining device according to the present invention, the connection checking laser light inlet section and the connection checking laser light outlet section may be wavelength division multiplexing couplers.

[0011] In addition, the optical connector connection determination device of the present invention may have the first connection confirmation laser light providing unit including a first wavelength division multiplexing coupler attached to the intermediate optical fiber and separating the connection confirmation laser light from the different wavelength laser light, and another first wavelength division multiplexing coupler attached to another intermediate optical fiber and combining the connection confirmation laser light with the different wavelength laser light, and the connection confirmation laser light separated by the first wavelength division multiplexing coupler is provided to the other first wavelength division multiplexing coupler.

[0012] In addition, the optical connector connection determination device of the present invention may be configured so that the first connection-confirming laser light applying unit includes a prism having a plane that contacts the end face of the intermediate optical fiber and the end face of the other intermediate optical fiber, and two inclined surfaces that intersect with the plane and intersect with each other, and a filter attached to the inclined surfaces that transmits the different wavelength laser light better than the connection-confirming laser light, and the connection-confirming laser light is emitted from the end face of the intermediate optical fiber, reflected by the two inclined surfaces, and incident on the end face of the other intermediate optical fiber.

[0013] In addition, the optical connector connection determination device of the present invention may have the second connection confirmation laser light providing unit including a second wavelength division multiplexing coupler attached to one of the second optical fibers and separating the connection confirmation laser light from the different wavelength laser light, and another second wavelength division multiplexing coupler attached to another of the second optical fibers and combining the connection confirmation laser light with the different wavelength laser light, and the connection confirmation laser light separated by the second wavelength division multiplexing coupler is provided to the other second wavelength division multiplexing coupler.

[0014] In addition, the optical connector connection determination device of the present invention may be configured so that the second connection-confirming laser light applying unit includes a prism having a plane that is tangent to the end face of the one second optical fiber and the end face of the other second optical fiber, and two inclined surfaces that intersect with the plane and intersect with each other, and a filter attached to the inclined surfaces and that transmits the different wavelength laser light better than the connection-confirming laser light, and the connection-confirming laser light is emitted from the end face of the second optical fiber, reflected by the two inclined surfaces, and incident on the end face of the other second optical fiber.

[0015] In the optical connector connection determining device according to the present invention, the intermediate optical fiber and another intermediate optical fiber may be adjacent to each other.

[0016] In the optical connector connection determining device according to the present invention, the one second optical fiber and the other second optical fiber may be adjacent to each other.

[0017] In addition, the optical connector connection determination device of the present invention may be configured so that the first optical fiber is connected to a test device, the second optical fiber is connected to an optical probe, and the different wavelength laser light is transmitted between the test device and the optical probe.

[0018] In the optical connector connection determining device according to the present invention, the first optical connector and the second optical connector may each have an MT ferrule.

[0019] In addition, the optical connector connection determination device of the present invention may be configured so that the connection determination unit determines whether the connection between the first optical connector and the second optical connector is good or bad based on the ratio between the optical power of the output of the connection confirmation laser light source and the optical power of the connection confirmation laser light extracted by the connection confirmation laser light extraction unit. [Brief explanation of the drawings]

[0020] [Figure 1]1 is a diagram illustrating a configuration of an optical connector connection determination device according to a first embodiment of the present invention. [Figure 2] FIG. 10 is a diagram illustrating a configuration of an optical connector connection determination device according to a second embodiment of the present invention. [Figure 3] FIG. 1 is a diagram illustrating an optical connector connection determination device according to a first modified example of the first embodiment. [Figure 4] FIG. 10 is a diagram illustrating an optical connector connection determination device according to a second modified example of the first embodiment. [Figure 5] FIG. 10 is a diagram illustrating an optical connector connection determination device according to a third modified example of the first embodiment. [Figure 6] FIG. 10 is a diagram illustrating an optical connector connection determination device according to a fourth modified example of the first embodiment. [Figure 7] FIG. 10 is a diagram illustrating an optical connector connection determination device according to a fifth modified example of the first embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0021] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0022] First embodiment FIG. 1 is a diagram showing the configuration of an optical connector connection determination device according to a first embodiment of the present invention. The optical connector connection determination device according to the first embodiment includes a semiconductor testing device 100, first optical fibers F1a, F1b, F1c, and F1d, a first optical connector 12, a 1.5 μm LD (a laser light source for connection confirmation) 14, a connection confirmation laser light introducing section 15, a 1.5 μm PD (a laser light detector for connection confirmation) 16, a connection confirmation laser light extracting section 17, a connection determination section 18, a first connection confirmation laser light providing section (a first wavelength division multiplexing coupler 19a, another first wavelength division multiplexing coupler 19b, and an optical fiber 19c), second optical fibers F2a, F2b, F2c, and F2d, a second optical connector 22, a probe card 23, a second connection confirmation laser light providing section (a second wavelength division multiplexing coupler 24a, another second wavelength division multiplexing coupler 24b, and an optical fiber 24c) (a second wavelength division multiplexing coupler 26a, another second wavelength division multiplexing coupler 26b, and an optical fiber 26c), and an optical probe 200.

[0023] The semiconductor test apparatus 100 is a well-known semiconductor test apparatus for testing a DUT (Device Under Test) 300. For example, the DUT 300 is a semiconductor wafer. The optical probe 200 is a well-known optical probe that provides an optical signal to the DUT 300 and receives an optical signal from the DUT 300. However, the optical connector connection determination apparatus according to the first embodiment can be operated even if the DUT 300 is not operated.

[0024] The first optical fibers F1a, F1b, F1c, and F1d are connected to the semiconductor testing device 100 and extend to an end face 12E of the first optical connector 12. The end faces of the first optical fibers F1a, F1b, F1c, and F1d are exposed at the end face 12E of the first optical connector 12.

[0025] The first optical connector 12 holds first optical fibers F1a, F1b, F1c, and F1d. Portions of the first optical fibers F1a, F1b, F1c, and F1d held by the first optical connector 12 are referred to as F11, F12, F13, and F14, respectively.

[0026] The second optical fibers F2a, F2b, F2c, and F2d are connected to the optical probe 200 and extend to the end face 22E of the second optical connector 22. The end faces of the second optical fibers F2a, F2b, F2c, and F2d are exposed at the end face 22E of the second optical connector 22.

[0027] The first optical connector 12 and the second optical connector 22 are connected so that the end face 12E of the first optical connector 12 contacts the end face 22E of the second optical connector 22. This connection brings the end faces of the first optical fibers F1a, F1b, F1c, and F1d into contact with the end faces of the second optical fibers F2a, F2b, F2c, and F2d. In this manner, the second optical fibers F2a, F2b, F2c, and F2d are connected to the first optical fibers F1a, F1b, F1c, and F1d.

[0028] The second optical connector 22 holds the second optical fibers F2a, F2b, F2c, and F2d. Portions of the second optical fibers F2a, F2b, F2c, and F2d held by the second optical connector 22 are referred to as F21, F22, F23, and F24, respectively.

[0029] The first optical connector 12 and the second optical connector 22 have MT ferrules. For example, the first optical connector 12 and the second optical connector 22 may be MT ferrules or may be connectors that house MT ferrules (for example, Blindmate connectors).

[0030] A second optical connector 22 is disposed on the front surface of the probe card 23, and an optical probe 200 is disposed on the back surface of the probe card 23. However, for convenience of illustration, the optical probe 200 is shown separated from the back surface of the probe card 23.

[0031] The 1.5 μm LD (laser light source for connection check) 14 outputs a connection check laser light (wavelength 1.5 μm) used to check the connection between the first optical connector 12 and the second optical connector 22.

[0032] A different wavelength laser light (wavelength 1.3 μm) different from the connection check laser light (wavelength 1.5 μm) also passes through the first optical fibers F1a, F1b, F1c, and F1d and the second optical fibers F2a, F2b, F2c, and F2d.

[0033] The different wavelength laser light is a laser light for testing semiconductors that is transmitted between the semiconductor testing equipment 100 and the optical probe 200. For example, the different wavelength laser light is transmitted from the semiconductor testing equipment 100 to the optical probe 200 via the first optical fiber F1a and the second optical fiber F2a. The different wavelength laser light is transmitted from the semiconductor testing equipment 100 to the optical probe 200 via the first optical fiber F1c and the second optical fiber F2c. The different wavelength laser light is transmitted from the optical probe 200 to the semiconductor testing equipment 100 via the first optical fiber F1b and the second optical fiber F2b. The different wavelength laser light is transmitted from the optical probe 200 to the semiconductor testing equipment 100 via the first optical fiber F1d and the second optical fiber F2d.

[0034] The connection check laser light introducing section 15 introduces the connection check laser light (wavelength 1.5 μm) received from the 1.5 μm LD 14 into an introducing optical fiber which is one of the first optical fibers F1a, F1b, F1c, and F1d (first optical fiber F1a in FIG. 1). The connection check laser light introducing section 15 is, for example, a wavelength division multiplexing coupler which combines the connection check laser light (wavelength 1.5 μm) and a different wavelength laser light (wavelength 1.3 μm).

[0035] The connection-checking laser light extraction unit 17 extracts connection-checking laser light (wavelength 1.5 μm) from an extraction optical fiber (first optical fiber F1d in FIG. 1), which is one of the first optical fibers F1a, F1b, F1c, and F1d other than the input optical fiber (first optical fiber F1a in FIG. 1). The connection-checking laser light extraction unit 17 is, for example, a wavelength division multiplexing coupler that separates the connection-checking laser light (wavelength 1.5 μm) from a different wavelength laser light (wavelength 1.3 μm).

[0036] The 1.5 μm PD (connection check laser light detector) 16 is a photodetector that detects the connection check laser light extracted from the extraction optical fiber (first optical fiber F1d in FIG. 1) by the connection check laser light extraction unit 17. The 1.5 μm PD 16 can measure the optical power of the connection check laser light extracted by the connection check laser light extraction unit 17.

[0037] The first connection confirmation laser light providing unit (having a first wavelength division multiplexing coupler 19a, another first wavelength division multiplexing coupler 19b, and an optical fiber 19c) receives connection confirmation laser light from an intermediate optical fiber F1b among the first optical fibers F1a, F1b, F1c, and F1d, which is neither the input optical fiber F1a nor the output optical fiber F1d, and provides it to another intermediate optical fiber F1c.

[0038] A first wavelength division multiplexing coupler 19a is attached to an intermediate optical fiber F1b and separates the connection check laser light from a different wavelength laser light. Another first wavelength division multiplexing coupler 19b is attached to another intermediate optical fiber F1c and combines the connection check laser light with a different wavelength laser light. The connection check laser light separated by the first wavelength division multiplexing coupler 19a is provided to another first wavelength division multiplexing coupler 19b via an optical fiber 19c.

[0039] The intermediate optical fiber F1b and another intermediate optical fiber F1c are adjacent to each other.

[0040] Two second connection check laser light applying units are provided.

[0041] The first second connection confirmation laser light providing unit (having a second wavelength division multiplexing coupler 24a, another second wavelength division multiplexing coupler 24b and an optical fiber 24c) receives connection confirmation laser light from one second optical fiber F2a and provides it to another second optical fiber F2b.

[0042] The second wavelength division multiplexing coupler 24a is attached to one second optical fiber F2a and separates the connection check laser light from the different wavelength laser light. The other second wavelength division multiplexing coupler 24b is attached to another second optical fiber F2b and combines the connection check laser light with the different wavelength laser light. The connection check laser light separated by the second wavelength division multiplexing coupler 24a is provided to the other second wavelength division multiplexing coupler 24b via an optical fiber 24c.

[0043] One second optical fiber F2a and another second optical fiber F2b are adjacent to each other.

[0044] The second second connection confirmation laser light providing unit (having a second wavelength division multiplexing coupler 26a, another second wavelength division multiplexing coupler 26b and an optical fiber 26c) receives connection confirmation laser light from one second optical fiber F2c and provides it to another second optical fiber F2d.

[0045] A second wavelength division multiplexing coupler 26a is attached to one second optical fiber F2c and separates the connection check laser light from a different wavelength laser light. Another second wavelength division multiplexing coupler 26b is attached to another second optical fiber F2d and combines the connection check laser light with a different wavelength laser light. The connection check laser light separated by the second wavelength division multiplexing coupler 26a is provided to the other second wavelength division multiplexing coupler 26b via the optical fiber 24c.

[0046] One second optical fiber F2c and another second optical fiber F2d are adjacent to each other.

[0047] The connection confirmation laser light passes through all of the portions F11, F12, F13, and F14 of the first optical fibers F1a, F1b, F1c, and F1d that are held by the first optical connector 12, and all of the portions F21, F22, F23, and F24 of the second optical fibers F2a, F2b, F2c, and F2d that are held by the second optical connector 22.

[0048] That is, the connection checking laser light is introduced into the introduction optical fiber (first optical fiber F1a in FIG. 1) by the connection checking laser light introducing section 15, and then passes through F11, F21, F22, F12, F13, F23, F24, and F14 in this order.

[0049] The connection determining unit 18 determines whether the connection between the first optical connector 12 and the second optical connector 22 is good or bad based on the connection checking laser light extracted by the connection checking laser light extracting unit 17 .

[0050] For example, the connection determining unit 18 receives from the 1.5 μm PD 16 the measurement result of the optical power of the connection-checking laser light extracted by the connection-checking laser light extracting unit 17. Furthermore, the connection determining unit 18 determines whether the connection between the first optical connector 12 and the second optical connector 22 is good or bad based on the ratio between the optical power of the output of the connection-checking laser light source 14 and the optical power of the connection-checking laser light extracted by the connection-checking laser light extracting unit 17.

[0051] For example, if the optical power of the connection confirmation laser light extracted by the connection confirmation laser light extraction unit 17 is almost the same (or significantly lower) as the optical power output from the connection confirmation laser light source 14, it is determined that the connection between the first optical connector 12 and the second optical connector 22 is good (or bad).

[0052] Next, the operation of the first embodiment will be described.

[0053] First, the first optical fibers F1a, F1b, F1c, and F1d connected to the semiconductor testing device 100 are held by the first optical connector 12. The second optical fibers F2a, F2b, F2c, and F2d connected to the optical probe 200 are held by the second optical connector 22.

[0054] Furthermore, the end face 12E of the first optical connector 12 is brought into contact with the end face 22E of the second optical connector 22, thereby connecting the first optical connector 12 and the second optical connector 22. This connection brings the end faces of the first optical fibers F1a, F1b, F1c, and F1d into contact with the end faces of the second optical fibers F2a, F2b, F2c, and F2d. In this way, the second optical fibers F2a, F2b, F2c, and F2d are connected to the first optical fibers F1a, F1b, F1c, and F1d.

[0055] Here, different wavelength laser light (wavelength 1.3 μm) is transmitted between the semiconductor testing device 100 and the optical probe 200 via first optical fibers F1a, F1b, F1c, F1d and second optical fibers F2a, F2b, F2c, F2d.

[0056] For example, different wavelength laser lights are transmitted from the semiconductor testing device 100 to the optical probe 200 via the first optical fiber F1a and the second optical fiber F2a (or the first optical fiber F1c and the second optical fiber F2c).

[0057] Furthermore, different wavelength laser lights are transmitted from the optical probe 200 to the semiconductor testing equipment 100 via the first optical fiber F1b and the second optical fiber F2b (or the first optical fiber F1d and the second optical fiber F2d).

[0058] An optical signal is transmitted between the optical probe 200 and the DUT 300 .

[0059] Furthermore, the connection check laser light (wavelength 1.5 μm) outputted from the 1.5 μm LD 14 is introduced by the connection check laser light introducing section 15 into the introduction optical fiber (first optical fiber F1a in FIG. 1).

[0060] The connection-checking laser light then passes through F11 and F21 and reaches the second wavelength-division multiplexing coupler 24a. After reaching the second wavelength-division multiplexing coupler 24a, the connection-checking laser light travels through the optical fiber 24c to reach another second wavelength-division multiplexing coupler 24b, and is provided to another second optical fiber F2b.

[0061] The connection-checking laser light then passes through F22 and F12 and reaches first wavelength-division multiplexing coupler 19a. After reaching first wavelength-division multiplexing coupler 19a, the connection-checking laser light travels through optical fiber 19c to another first wavelength-division multiplexing coupler 19b, and is then provided to another intermediate optical fiber F1c.

[0062] The connection-checking laser light then passes through F13 and F23 and reaches second wavelength-division multiplexing coupler 26a. After reaching second wavelength-division multiplexing coupler 26a, the connection-checking laser light travels through optical fiber 26c to another second wavelength-division multiplexing coupler 26b, and is provided to another second optical fiber F2d.

[0063] The connection checking laser light then passes through F24 and F14 and reaches the connection checking laser light extraction unit 17. The optical power of the connection checking laser light extracted by the connection checking laser light extraction unit 17 is measured by the 1.5 μm PD 16, and the result is provided to the connection determining unit 18. Based on the ratio between this measurement result and the optical power of the output of the connection checking laser light source 14, the connection determining unit 18 determines whether the connection between the first optical connector 12 and the second optical connector 22 is good or bad.

[0064] For example, if the measurement result is almost the same as the optical power output from the connection check laser light source 14, it is determined that the connection between the first optical connector 12 and the second optical connector 22 is good.

[0065] For example, suppose that dust is deposited on the end face of F11, causing a poor connection between the end face of F11 and the end face of F21. In this case, the measurement result of the 1.5 μm PD 16 will be significantly lower than the optical power output from the connection check laser light source 14. The connection determiner 18 will then determine that the connection between the first optical connector 12 and the second optical connector 22 is poor.

[0066] Of course, if the measurement result of the 1.5 μm PD 16 is significantly lower than the optical power output by the connection-checking laser light source 14, this may not only be due to a poor connection between the end faces of F11 and F21, but may also be due to a poor connection between the end faces of F12 and F22, a poor connection between the end faces of F13 and F23, or a poor connection between the end faces of F14 and F24. In other words, while it is clear that the connection between the first optical connector 12 and the second optical connector 22 is poor, it is not clear which optical fiber has the poor connection. However, if it is determined that the connection between the first optical connector 12 and the second optical connector 22 is poor, simply replacing the first optical connector 12 and the second optical connector 22 with a different one will improve the connection between the first optical connector 12 and the second optical connector 22, so this is not a particular problem.

[0067] In the above description of the operation of the first embodiment, the operation has been described when the DUT 300 is operating. However, even if the DUT 300 is not operating, or even if different wavelength laser light is not transmitted between the semiconductor testing device 100 and the optical probe 200, the optical connector connection determination device can still operate by using a connection check laser light. In other words, it is possible to determine whether the connection between the first optical connector 12 and the second optical connector 22 is good or bad.

[0068] According to the first embodiment, it is possible to determine whether the connection between the first optical connector 12 and the second optical connector 22 is good or bad.

[0069] This determination is possible even if the DUT 300 is operating and different wavelength laser light is being transmitted between the semiconductor test device 100 and the optical probe 200. This determination is also possible even if the DUT 300 is not operating and different wavelength laser light is not being transmitted between the semiconductor test device 100 and the optical probe 200.

[0070] The first embodiment may be modified as follows.

[0071] <Variation 1> In the first embodiment, one second optical fiber F2a (or F2c) and another second optical fiber F2b (or F2d) are adjacent to each other. However, in the first modification of the first embodiment, one second optical fiber F2a (or F2b) and another second optical fiber F2c (or F2d) are not adjacent to each other.

[0072] 3 is a diagram showing an optical connector connection determining device according to Modification 1 of the first embodiment. Note that parts similar to those in the first embodiment are given the same reference numerals and descriptions thereof will be omitted.

[0073] The first second connection confirmation laser light providing unit (having a second wavelength division multiplexing coupler 24a, another second wavelength division multiplexing coupler 24b and an optical fiber 24c) receives connection confirmation laser light from one second optical fiber F2a and provides it to another second optical fiber F2c.

[0074] The second wavelength division multiplexing coupler 24a is attached to one second optical fiber F2a and separates the connection check laser light from the different wavelength laser light. Another second wavelength division multiplexing coupler 24b is attached to another second optical fiber F2c and combines the connection check laser light with the different wavelength laser light. The connection check laser light separated by the second wavelength division multiplexing coupler 24a is provided to the other second wavelength division multiplexing coupler 24b via an optical fiber 24c.

[0075] Note that one second optical fiber F2a and another second optical fiber F2c are not adjacent to each other.

[0076] The second second connection confirmation laser light providing unit (having a second wavelength division multiplexing coupler 26a, another second wavelength division multiplexing coupler 26b and an optical fiber 26c) receives connection confirmation laser light from one second optical fiber F2b and provides it to another second optical fiber F2d.

[0077] A second wavelength division multiplexing coupler 26a is attached to one second optical fiber F2b and separates the connection check laser light from a different wavelength laser light. Another second wavelength division multiplexing coupler 26b is attached to another second optical fiber F2d and combines the connection check laser light with a different wavelength laser light. The connection check laser light separated by the second wavelength division multiplexing coupler 26a is provided to the other second wavelength division multiplexing coupler 26b via the optical fiber 24c.

[0078] It should be noted that one second optical fiber F2b and another second optical fiber F2d are not adjacent to each other.

[0079] Here, the first connection confirmation laser light providing unit (having a first wavelength division multiplexing coupler 19a, another first wavelength division multiplexing coupler 19b and an optical fiber 19c) receives connection confirmation laser light from the intermediate optical fiber F1c and provides it to another intermediate optical fiber F1b.

[0080] The first wavelength division multiplexing coupler 19a is attached to the intermediate optical fiber F1c and separates the connection check laser light from the different wavelength laser light. Another first wavelength division multiplexing coupler 19b is attached to another intermediate optical fiber F1b and combines the connection check laser light with the different wavelength laser light. The connection check laser light separated by the first wavelength division multiplexing coupler 19a is provided to the other first wavelength division multiplexing coupler 19b via the optical fiber 19c.

[0081] The connection checking laser light is introduced into the introduction optical fiber (first optical fiber F1a in FIG. 3) by the connection checking laser light introducing section 15, and then passes through F11, F21, F23, F13, F12, F22, F24, and F14 in this order.

[0082] <Variation 2> In the first embodiment, the extraction optical fiber (the first optical fiber F1d in FIG. 1) is located at the rightmost position among the first optical fibers F1a, F1b, F1c, and F1d. However, in the second modification of the first embodiment, the extraction optical fiber (the first optical fiber F1b in FIG. 4) is not located at the rightmost position among the first optical fibers F1a, F1b, F1c, and F1d.

[0083] 4 is a diagram showing an optical connector connection determination device according to Modification 2 of the first embodiment. Note that the same parts as those in the first embodiment are given the same reference numerals and the description thereof will be omitted.

[0084] The connection check laser light extraction unit 17 extracts connection check laser light (wavelength 1.5 μm) from an extraction optical fiber (first optical fiber F1b in FIG. 4).

[0085] The first wavelength division multiplexing coupler 19a is attached to the intermediate optical fiber F1d, and another first wavelength division multiplexing coupler 19b is attached to another intermediate optical fiber F1c.

[0086] Also, a second wavelength division multiplexing coupler 24a is attached to one second optical fiber F2a, and another second wavelength division multiplexing coupler 24b is attached to another second optical fiber F2d.

[0087] Furthermore, a second wavelength division multiplexing coupler 26a is attached to one second optical fiber F2c, and another second wavelength division multiplexing coupler 26b is attached to another second optical fiber F2b.

[0088] The connection checking laser light is introduced into the introduction optical fiber (first optical fiber F1a in FIG. 4) by the connection checking laser light introducing section 15, and then passes through F11, F21, F24, F14, F13, F23, F22, and F12 in this order.

[0089] <Variation 3> In the first embodiment, there are four first optical fibers F1a, F1b, F1c, and F1d and four second optical fibers F2a, F2b, F2c, and F2d, but there may be an even number of six or more.

[0090] 5 is a diagram showing an optical connector connection determination device according to a third modification of the first embodiment. The same components as those in the first embodiment are designated by the same reference numerals, and a description thereof will be omitted. There are six first optical fibers F1a, F1b, F1c, F1d, F1e, and F1f, and six second optical fibers F2a, F2b, F2c, F2d, F2e, and F2f.

[0091] Different wavelength laser light (wavelength 1.3 μm) is transmitted between the semiconductor testing device 100 and the optical probe 200 via first optical fibers F1a, F1b, F1c, F1d, F1e, F1f and second optical fibers F2a, F2b, F2c, F2d, F2e, F2f.

[0092] For example, different wavelength laser lights are transmitted from the semiconductor testing device 100 to the optical probe 200 via the first optical fiber F1e and the second optical fiber F2e.

[0093] Furthermore, different wavelength laser lights are transmitted from the optical probe 200 to the semiconductor testing device 100 via the first optical fiber F1f and the second optical fiber F2f.

[0094] However, the extraction optical fiber is the first optical fiber F1f.

[0095] The second first connection confirmation laser light providing unit (having a first wavelength division multiplexing coupler 11a, another first wavelength division multiplexing coupler 11b, and an optical fiber 11c) receives connection confirmation laser light from an intermediate optical fiber F1d among the first optical fibers F1a, F1b, F1c, F1d, F1e, and F1f, which is neither the input optical fiber F1a nor the output optical fiber F1f, and provides it to another intermediate optical fiber F1e.

[0096] The second first wavelength division multiplexing coupler 11a is attached to an intermediate optical fiber F1d and separates the connection check laser light from a different wavelength laser light. Another first wavelength division multiplexing coupler 11b is attached to another intermediate optical fiber F1e and combines the connection check laser light with a different wavelength laser light. The connection check laser light separated by the first wavelength division multiplexing coupler 11a is provided to another first wavelength division multiplexing coupler 11b via an optical fiber 11c.

[0097] The third second connection confirmation laser light providing unit (having a second wavelength division multiplexing coupler 28a, another second wavelength division multiplexing coupler 28b and an optical fiber 28c) receives connection confirmation laser light from one second optical fiber F2e and provides it to another second optical fiber F2f.

[0098] A second wavelength division multiplexing coupler 28a is attached to one second optical fiber F2e and separates the connection check laser light from a different wavelength laser light. Another second wavelength division multiplexing coupler 28b is attached to another second optical fiber F2f and combines the connection check laser light with a different wavelength laser light. The connection check laser light separated by the second wavelength division multiplexing coupler 28a is provided to another second wavelength division multiplexing coupler 28b via an optical fiber 28c.

[0099] In addition, the connection checking laser light is introduced into the introduced optical fiber (first optical fiber F1a in Figure 5) by the connection checking laser light introducing section 15, and then passes through F11, F21, F22, F12, F13, F23, F24, F14, F15, F25, F26, and F16 in that order.

[0100] <Variation 4> In the first embodiment and its modified example 3, one intermediate optical fiber F1b (or F1d) and another intermediate optical fiber F1c (or F1e) are adjacent to each other. However, in modified example 4 of the first embodiment, one intermediate optical fiber F1b (or F1c) and another intermediate optical fiber F1d (or F1e) are not adjacent to each other.

[0101] FIG. 6 is a diagram illustrating an optical connector connection determination device according to a fourth modification of the first embodiment. The same parts as those in the third modification of the first embodiment are denoted by the same reference numerals and the description thereof will be omitted.

[0102] The first connection confirmation laser light providing unit (having a first wavelength division multiplexing coupler 19a, another first wavelength division multiplexing coupler 19b, and an optical fiber 19c) receives connection confirmation laser light from an intermediate optical fiber F1b among the first optical fibers F1a, F1b, F1c, and F1d, which is neither the input optical fiber F1a nor the output optical fiber F1d, and provides it to another intermediate optical fiber F1d.

[0103] A first wavelength division multiplexing coupler 19a is attached to an intermediate optical fiber F1b and separates the connection check laser light from a different wavelength laser light. Another first wavelength division multiplexing coupler 19b is attached to another intermediate optical fiber F1d and combines the connection check laser light with a different wavelength laser light. The connection check laser light separated by the first wavelength division multiplexing coupler 19a is provided to another first wavelength division multiplexing coupler 19b via an optical fiber 19c.

[0104] The intermediate optical fiber F1b and another intermediate optical fiber F1d are not adjacent to each other.

[0105] The second first wavelength division multiplexing coupler 11a is attached to an intermediate optical fiber F1c and separates the connection check laser light from a different wavelength laser light. Another first wavelength division multiplexing coupler 11b is attached to another intermediate optical fiber F1e and combines the connection check laser light with a different wavelength laser light. The connection check laser light separated by the first wavelength division multiplexing coupler 11a is provided to another first wavelength division multiplexing coupler 11b via an optical fiber 11c.

[0106] The intermediate optical fiber F1c and another intermediate optical fiber F1e are not adjacent to each other.

[0107] The second second connection confirmation laser light providing unit (having a second wavelength division multiplexing coupler 26a, another second wavelength division multiplexing coupler 26b and an optical fiber 26c) receives connection confirmation laser light from one second optical fiber F2d and provides it to another second optical fiber F2c.

[0108] A second wavelength division multiplexing coupler 26a is attached to one second optical fiber F2d and separates the connection check laser light from a different wavelength laser light. Another second wavelength division multiplexing coupler 26b is attached to another second optical fiber F2c and combines the connection check laser light with a different wavelength laser light. The connection check laser light separated by the second wavelength division multiplexing coupler 26a is provided to another second wavelength division multiplexing coupler 2b via an optical fiber 26c.

[0109] In addition, the connection checking laser light is introduced into the introduced optical fiber (first optical fiber F1a in Figure 6) by the connection checking laser light introducing section 15, and then passes through F11, F21, F22, F12, F14, F24, F23, F13, F15, F25, F26, and F16 in that order.

[0110] <Variation 5> In the third modification of the first embodiment, the extraction optical fiber (the first optical fiber F1f in FIG. 5) is located at the rightmost position among the first optical fibers F1a, F1b, F1c, F1d, F1e, and F1f. However, in the fifth modification of the first embodiment, the extraction optical fiber (the first optical fiber F1b in FIG. 7) is not located at the rightmost position among the first optical fibers F1a, F1b, F1c, F1d, F1e, and F1f. Moreover, in the fifth modification of the first embodiment, one second optical fiber F2a and another second optical fiber F2f are not adjacent to each other.

[0111] 7 is a diagram showing an optical connector connection determination device according to Modification 5 of the first embodiment. Note that parts similar to those in Modification 3 of the first embodiment are given the same reference numerals and description thereof will be omitted.

[0112] The connection check laser light extraction unit 17 extracts connection check laser light (wavelength 1.5 μm) from an extraction optical fiber (first optical fiber F1b in FIG. 7).

[0113] The first wavelength division multiplexing coupler 19a is attached to the intermediate optical fiber F1f, and another first wavelength division multiplexing coupler 19b is attached to another intermediate optical fiber F1e.

[0114] Also, a first wavelength division multiplexing coupler 11a is attached to an intermediate optical fiber F1d, and another first wavelength division multiplexing coupler 11b is attached to another intermediate optical fiber F1c.

[0115] The second wavelength division multiplexing coupler 24a is attached to one second optical fiber F2a, and another second wavelength division multiplexing coupler 24b is attached to another second optical fiber F2f.

[0116] Also, a second wavelength division multiplexing coupler 26a is attached to one second optical fiber F2e, and another second wavelength division multiplexing coupler 26b is attached to another second optical fiber F2d.

[0117] Furthermore, a second wavelength division multiplexing coupler 28a is attached to one second optical fiber F2c, and another second wavelength division multiplexing coupler 28b is attached to another second optical fiber F2b.

[0118] The connection checking laser light is introduced into the introduced optical fiber (first optical fiber F1a in Figure 7) by the connection checking laser light introducing section 15, and then passes through F11, F21, F26, F16, F15, F25, F24, F14, F13, F23, F22, and F12 in that order.

[0119] Second embodiment The second embodiment differs from the first embodiment in that a prism 120 and filters 122a and 122b are used as the first connection confirmation laser light providing unit, and a prism 220 and filters 222a and 222b and a prism 240 and filters 242a and 242b are used as the second connection confirmation laser light providing unit.

[0120] 2 is a diagram showing the configuration of an optical connector connection determination device according to a second embodiment of the present invention. The optical connector connection determination device according to the second embodiment includes a semiconductor testing device 100, first optical fibers F1a, F1b, F1c, and F1d, a first optical connector 12, a 1.5 μm LD (a connection check laser light source) 14, a connection check laser light introducing unit 15, a 1.5 μm PD (a connection check laser light detector) 16, a connection check laser light extracting unit 17, a connection determination unit 18, a first connection check laser light applying unit (a prism 120, filters 122a and 122b), a transparent member 110, second optical fibers F2a, F2b, F2c, and F2d, a second optical connector 22, a probe card 23, a second connection check laser light applying unit (a prism 220, filters 222a and 222b) (a prism 240, filters 242a and 242b), a transparent member 210, and an optical probe 200. Hereinafter, parts similar to those in the first embodiment will be given the same reference numerals and descriptions thereof will be omitted.

[0121] The transparent member 110 is in contact with the first optical connector 12. The transparent member 110 is disposed between the semiconductor testing equipment 100 and the first optical connector 12. The first optical fibers F1a, F1b, F1c, and F1d extend from the semiconductor testing equipment 100 to the end face 12E of the first optical connector 12, as in the first embodiment, but are interrupted by the transparent member 110. Note that the connection-checking laser light (wavelength 1.5 μm) and the different-wavelength laser light (wavelength 1.3 μm) pass through the transparent member 110.

[0122] The first connection check laser light applying unit (having a prism 120 and filters 122a and 122b) is disposed within the transparent member 110.

[0123] The prism 120 has a flat surface 120c and two inclined surfaces 120a and 120b. The flat surface 120c contacts an end face of the intermediate optical fiber F1b (of which the portion F12 is held by the first optical connector 12) and an end face of another intermediate optical fiber F1c (of which the portion F13 is held by the first optical connector 12). The two inclined surfaces 120a and 120b intersect the flat surface 120c and each other.

[0124] Filter 122a is attached to inclined surface 120a and transmits different wavelength laser light more efficiently than connection-checking laser light. Filter 122b is attached to inclined surface 120b and transmits different wavelength laser light more efficiently than connection-checking laser light. Filters 122a and 122b are, for example, thin films.

[0125] The connection confirmation laser light is emitted from the end face of the intermediate optical fiber F1b (of which the portion F12 is held by the first optical connector 12), reflected by the two inclined surfaces 120a, 120b, and incident on the end face of another intermediate optical fiber F1c (of which the portion F13 is held by the first optical connector 12).

[0126] The transparent member 210 is in contact with the second optical connector 22. The transparent member 210 is disposed between the optical probe 200 and the second optical connector 22. The second optical fibers F2a, F2b, F2c, and F2d extend from the optical probe 200 to the end face 22E of the second optical connector 22, as in the first embodiment, but are interrupted by the transparent member 210. Note that the connection-checking laser light (wavelength 1.5 μm) and the different-wavelength laser light (wavelength 1.3 μm) pass through the transparent member 210.

[0127] The first second connection check laser light applying unit (prism 220, filters 222a, 222b) is disposed inside the transparent member 210.

[0128] The prism 220 has a flat surface 220c and two inclined surfaces 220a and 220b. The flat surface 220c contacts an end face of the second optical fiber F2a (of which the portion F21 is held by the second optical connector 22) and an end face of another second optical fiber F2b (of which the portion F22 is held by the second optical connector 22). The two inclined surfaces 220a and 220b intersect the flat surface 220c and each other.

[0129] Filter 222a is attached to inclined surface 220a and transmits different wavelength laser light more efficiently than connection-checking laser light. Filter 222b is attached to inclined surface 220b and transmits different wavelength laser light more efficiently than connection-checking laser light. Filters 222a and 222b are, for example, thin films.

[0130] The connection confirmation laser light is emitted from the end face of the second optical fiber F2a (of which the portion F21 is held by the second optical connector 22), reflected by the two inclined surfaces 220a, 220b, and incident on the end face of another second optical fiber F2b (of which the portion F22 is held by the second optical connector 22).

[0131] The second second connection check laser light applying unit (prism 240, filters 242a, 242b) is disposed inside the transparent member 210.

[0132] The prism 240 has a flat surface 240c and two inclined surfaces 240a and 240b. The flat surface 240c contacts an end face of the second optical fiber F2c (of which the portion F23 is held by the second optical connector 22) and an end face of another second optical fiber F2d (of which the portion F24 is held by the second optical connector 22). The two inclined surfaces 240a and 240b intersect the flat surface 240c and each other.

[0133] Filter 242a is attached to inclined surface 240a and transmits different wavelength laser light more efficiently than connection check laser light. Filter 242b is attached to inclined surface 240b and transmits different wavelength laser light more efficiently than connection check laser light. Filters 242a and 242b are, for example, thin films.

[0134] The connection confirmation laser light is emitted from the end face of the second optical fiber F2c (of which the portion F23 is held by the second optical connector 22), reflected by the two inclined surfaces 240a, 240b, and incident on the end face of another second optical fiber F2d (of which the portion F24 is held by the second optical connector 22).

[0135] Next, the operation of the second embodiment will be described.

[0136] Similar to the first embodiment, the second optical fibers F2a, F2b, F2c, and F2d are connected to the first optical fibers F1a, F1b, F1c, and F1d by connecting the first optical connector 12 and the second optical connector 22, and different wavelength laser light is transmitted between the semiconductor testing device 100 and the optical probe 200. The different wavelength laser light passes through the transparent members 110 and 210, the filters 122a and 122b, the filters 222a and 222b, and the filters 242a and 242b.

[0137] Furthermore, the connection check laser light (wavelength 1.5 μm) outputted from the 1.5 μm LD 14 is introduced by the connection check laser light introducing section 15 into the introduction optical fiber (first optical fiber F1a in FIG. 2).

[0138] The connection confirmation laser light then passes through the transparent members 110, F11 and F21, and is incident on the flat surface 220c of the prism 220, where it is reflected by the two inclined surfaces 220a and 220b and is incident on the end face of another second optical fiber F2b (of which the portion F22 is held by the second optical connector 22).

[0139] The connection confirmation laser light then passes through F22 and F12 and enters the flat surface 120c of the prism 120, where it is reflected by the two inclined surfaces 120a and 120b and enters the end face of another intermediate optical fiber F1c (of which the portion F13 is held by the first optical connector 12).

[0140] The connection confirmation laser light then passes through F13 and F23 and enters the flat surface 240c of the prism 240, where it is reflected by the two inclined surfaces 242a and 242b and enters the end face of another second optical fiber F2d (of which the portion F24 is held by the second optical connector 22).

[0141] The connection checking laser light then passes through F24, F14 and the transparent member 110, and reaches the connection checking laser light extraction unit 17. The optical power of the connection checking laser light extracted by the connection checking laser light extraction unit 17 is measured by the 1.5 μm PD 16, and the result is provided to the connection determining unit 18. Based on the ratio between this measurement result and the optical power of the output of the connection checking laser light source 14, the connection determining unit 18 determines whether the connection between the first optical connector 12 and the second optical connector 22 is good or bad.

[0142] The connection determining unit 18 determines whether the connection is good or bad in the same manner as in the first embodiment.

[0143] According to the second embodiment, the same effects as those of the first embodiment are achieved.

[0144] <Modification> As a variation of the second embodiment, it is possible to use a combination of a wavelength division multiplexing coupler (first embodiment) and a prism (second embodiment) as the first connection confirmation laser light providing unit and the second connection confirmation laser light providing unit.

[0145] That is, it is also possible to replace the first connection check laser light providing unit (prism 120, filters 122a, 122b) according to the second embodiment with the same unit as that of the first embodiment. Also, it is also possible to replace one or both of the first second connection check laser light providing unit (prism 220, filters 222a, 222b) and the second second connection check laser light providing unit (prism 240, filters 242a, 242b) according to the second embodiment with the same unit as that of the first embodiment. [Explanation of symbols]

[0146] 100 Semiconductor testing equipment F1a, F1b, F1c, F1d, F1e, F1f Daiichi Optical Fiber F11, F12, F13, F14: Portions held by the first optical connector 12 F1a introduced optical fiber F1d (Fig. 1, Fig. 2, Fig. 3) Extraction optical fiber F1b (Fig. 4, Fig. 7) Extraction optical fiber F1f (Fig. 5, Fig. 6) Extraction optical fiber 12 First optical connector 14 1.5μmLD (laser light source for connection confirmation) 15 Laser light introduction point for connection confirmation 16 1.5μmPD (laser photodetector for connection confirmation) 17 Laser light output for connection confirmation 18 Connection determination unit 19a, 11a First wavelength division multiplexing coupler 19b, 11b Another first wavelength division multiplexing coupler 19c, 11c optical fiber F2a, F2b, F2c, F2d, F2e, F2f Second optical fiber F21, F22, F23, F24: Portions held by the second optical connector 22 22 Second optical connector 23 Probe Card 24a, 26a, 28a Second Wavelength Division Multiplexing Coupler 24b, 26b, 28b Another second wavelength division multiplexing coupler 220, 240 Prism 222a, 222b, 242a, 242b filters 200 Optical Probes 300 DUT

Claims

1. a first optical connector holding a first optical fiber; a second optical connector that holds a second optical fiber to be connected to the first optical fiber and is connected to the first optical connector; a connection confirmation laser light source that outputs a connection confirmation laser light used to confirm the connection between the first optical connector and the second optical connector; a connection confirmation laser light introduction section that introduces the connection confirmation laser light into an introduction optical fiber that is one of the first optical fibers; a connection confirmation laser light extraction unit that extracts the connection confirmation laser light from an extraction optical fiber that is one of the first optical fibers other than the introduction optical fiber; a connection determination unit that determines whether the connection between the first optical connector and the second optical connector is good or bad based on the connection confirmation laser light extracted by the connection confirmation laser light extraction unit; a first connection-checking laser light applying unit that receives the connection-checking laser light from an intermediate optical fiber that is neither the introduction optical fiber nor the extraction optical fiber among the first optical fibers, and applies the laser light to another intermediate optical fiber; a second connection-checking laser light applying unit that receives the connection-checking laser light from one of the second optical fibers and applies it to another second optical fiber; Equipped with the connection-checking laser light passes through the entire portion of the first optical fiber held by the first optical connector and the entire portion of the second optical fiber held by the second optical connector; Optical connector connection determination device.

2. 2. The optical connector connection determination device according to claim 1, The optical connector connection determination device also allows laser light with a different wavelength from the connection confirmation laser light to pass through the first optical fiber and the second optical fiber.

3. 3. The optical connector connection determination device according to claim 2, the connection check laser light introducing section multiplexes the connection check laser light and the different wavelength laser light, the connection-checking laser light extraction unit separates the connection-checking laser light from the different wavelength laser light; Optical connector connection determination device.

4. 4. The optical connector connection determination device according to claim 3, The optical connector connection determination device, wherein the connection confirmation laser light inlet and the connection confirmation laser light outlet are wavelength division multiplexing couplers.

5. 3. The optical connector connection determination device according to claim 2, the first connection-confirming laser light applying unit, a first wavelength division multiplexing coupler attached to the intermediate optical fiber and configured to separate the connection check laser light from the different wavelength laser light; a second wavelength division multiplexing coupler attached to the second intermediate optical fiber and configured to couple the connection check laser light and the different wavelength laser light; The optical connector connection determination device provides the connection confirmation laser light demultiplexed by the first wavelength division multiplexing coupler to the other first wavelength division multiplexing coupler.

6. 3. The optical connector connection determination device according to claim 2, the first connection-confirming laser light applying unit, a prism having a plane tangent to the end face of the intermediate optical fiber and the end face of the other intermediate optical fiber, and two inclined planes intersecting the plane and intersecting each other; a filter attached to the inclined surface, the filter transmitting the different wavelength laser light more effectively than the connection check laser light; The optical connector connection determination device is configured so that the connection-checking laser light is emitted from the end face of the intermediate optical fiber, reflected by the two inclined surfaces, and incident on the end face of the other intermediate optical fiber.

7. 3. The optical connector connection determination device according to claim 2, the second connection check laser light applying unit, a second wavelength division multiplexing coupler attached to the one second optical fiber and separating the connection check laser light from the different wavelength laser light; a second wavelength division multiplexing coupler attached to the second optical fiber and configured to multiplex the connection check laser light and the different wavelength laser light, The optical connector connection determination device provides the connection confirmation laser light demultiplexed by the second wavelength division multiplexing coupler to the other second wavelength division multiplexing coupler.

8. 3. The optical connector connection determination device according to claim 2, the second connection check laser light applying unit, a prism having a plane tangent to the end face of the one second optical fiber and the end face of the other second optical fiber, and two inclined surfaces intersecting the plane and intersecting each other; a filter attached to the inclined surface, the filter transmitting the different wavelength laser light more effectively than the connection check laser light; The optical connector connection determination device in which the connection confirmation laser light is emitted from the end face of the second optical fiber, reflected by the two inclined surfaces, and incident on the end face of the other second optical fiber.

9. 2. The optical connector connection determination device according to claim 1, The optical connector connection determination device has the intermediate optical fiber and another intermediate optical fiber adjacent to each other.

10. 2. The optical connector connection determination device according to claim 1, The optical connector connection determination device in which the one second optical fiber and another second optical fiber are adjacent to each other.

11. 3. The optical connector connection determination device according to claim 2, the first optical fiber is connected to a test device; the second optical fiber is connected to an optical probe; the different wavelength laser lights are transmitted between the test device and the optical probe; Optical connector connection determination device.

12. 2. The optical connector connection determination device according to claim 1, The optical connector connection determination device, wherein the first optical connector and the second optical connector have MT ferrules.

13. 2. The optical connector connection determination device according to claim 1, The connection determination unit determining whether the connection between the first optical connector and the second optical connector is good or bad based on a ratio between the optical power of the output of the connection check laser light source and the optical power of the connection check laser light extracted by the connection check laser light extraction unit; Optical connector connection determination device.

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