JP2011232706A - Optical device, optical monitoring system and manufacturing method of optical device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical device capable of deriving light by integrating the optical device with an optical waveguide for propagating light.SOLUTION: An optical device includes a light derivation section (8) for deriving light from an optical waveguide (6) in a direction crossing an axial direction of the optical waveguide (6) for guiding light. The light derivation section (8) includes one or more waveguide holes (12) formed in a cladding section (10) covering the optical waveguide (6), and an optical waveguide member (14) that is disposed in the waveguide hole (12) and guides light from the optical waveguide (6). The optical waveguide member (14) is composed of light transmissive resin (44) or an optical fiber.

Description

The present invention relates to an optical device that derives light from an optical waveguide, such as an optical waveguide wiring, for example, an optical device that is integrally formed with an optical waveguide to which an optical functional device is connected, and that can monitor light, an optical monitoring system, and The present invention relates to an optical device manufacturing method and the like.

  A plurality of optical functional devices are connected to the optical waveguide for propagating light. It is necessary to monitor the light intensity in the optical waveguide because a large number of optical functional devices are connected or optical attenuation occurs when light is demultiplexed or branched. Even when the light intensity is set high, it is necessary to monitor the light intensity in order to protect the optical functional device.

With respect to such an optical device, it is known that a fiber is processed to change a refractive index to provide a device function (Patent Document 1).

JP 2008-52053 A

  By the way, when monitoring the light propagating through the optical waveguide, if the configuration for branching the light is increased, the installation position and the accommodation space are restricted.

Therefore, in view of the above problems, an object of the optical device, the optical monitor system, and the optical device manufacturing method of the present disclosure is to derive light by integrating the optical device into an optical waveguide that propagates light.

  In order to achieve the above object, an optical device according to the present disclosure is formed by forming a single or a plurality of waveguide holes in a clad portion covering an optical waveguide, and providing the optical waveguide with an optical waveguide member in the waveguide hole. Includes a configuration to take out.

  In order to achieve the above object, an optical monitoring system of the present disclosure includes an optical device that is installed in an optical waveguide connected to an optical functional device and extracts light. The optical device includes the configuration described above.

In order to achieve the above object, an optical device manufacturing method of the present disclosure includes a step of forming a single or a plurality of waveguide holes in a cladding portion that is installed around an optical waveguide and shields light, and the waveguide A step of installing an optical waveguide member in the hole.

  According to the optical device, the optical monitor system, and the manufacturing method thereof of the present disclosure, the following effects can be obtained.

  (1) It can be in-line with the optical waveguide, and light propagating to the optical waveguide can be derived from the optical waveguide and monitored.

(2) With the simplification of the optical monitor structure, the size can be reduced and the space can be saved.

Other objects, features, and advantages of the present invention will become clearer with reference to the accompanying drawings and each embodiment.

It is a figure which shows an example of the optical device which concerns on 1st Embodiment. It is a figure which shows an example of the manufacturing method of the optical device which concerns on 1st Embodiment. It is a figure which shows an example of the optical device which concerns on 2nd Embodiment. It is sectional drawing which shows an example of a light derivation | leading-out part. It is the VV sectional view taken on the line of FIG. It is sectional drawing which shows an example of another light derivation | leading-out part. It is a figure which shows an example of the manufacturing method of an optical device. It is a figure showing propagation of light and generation of leak light. It is a figure which shows the function of a single light derivation | leading-out part. It is a figure which shows the function of a single light derivation | leading-out part. It is a figure which shows the function of a some light derivation | leading-out part. It is a figure which shows an example of the optical device which concerns on 3rd Embodiment. It is a figure which shows light derivation | leading-out of an optical device provided with a some light derivation | leading-out part. It is a figure which shows an example of the optical device which concerns on 4th Embodiment. It is a figure which shows an example of a filter characteristic. It is a figure which shows an example of the optical device which concerns on 5th Embodiment. It is a figure which shows an example of the optical device which concerns on 6th Embodiment. It is a figure which shows an example of the cross-section of an optical device. It is a figure which shows an example of the cross-section of another optical device. It is a figure which shows an example of the optical device which concerns on 7th Embodiment. It is a figure which shows the function of the optical device provided with FGB. It is a figure which shows the refractive index change characteristic of the light derivation | leading-out part of the optical device which concerns on 8th Embodiment. It is a figure which shows an example of the light derivation | leading-out angle of the optical device which concerns on 9th Embodiment. It is a figure which shows an example of the optical device which concerns on 10th Embodiment. It is a figure which shows an example of the optical monitor system which concerns on 11th Embodiment. It is a figure which shows an example of the manufacturing method of the optical device which concerns on 12th Embodiment. It is a figure which shows an example of the manufacturing method of an optical device. It is a figure which shows an example of a dicing process. It is a figure which shows the other example of a dicing process. It is a figure which shows an example of the manufacturing method of the optical device which concerns on 13th Embodiment. It is a figure which shows an example of the manufacturing method of the optical device which concerns on 14th Embodiment. It is a figure which shows an example of an etching process and a resin filling process. It is a figure which shows the comparative example of an optical monitor system.

[First Embodiment]

  The first embodiment includes a light deriving portion in a direction intersecting with the axial direction of the optical waveguide, and the light deriving portion includes a waveguide hole formed in the cladding portion, and an optical waveguide member that guides light from the optical waveguide; An optical device comprising: and a manufacturing method thereof.

  The first embodiment will be described with reference to FIG. FIG. 1 shows an example of an optical device according to the first embodiment.

  This optical device 2 is an example of the optical device of the present disclosure and a method for manufacturing the optical device 2. The optical device 2 is configured inline with a monitor structure for light propagating in the axial direction of the optical waveguide 6 of the optical fiber 4. A light derivation unit 8 for derivation is provided. The optical waveguide 6 is an example of a means for guiding light, and is a core portion of the optical fiber 4. The light lead-out part 8 includes an optical waveguide member 14 in a waveguide hole 12 formed in the clad part 10 covering the optical waveguide 6.

  The clad portion 10 is an example of a member that covers the optical waveguide 6, and may be composed of the same member as the optical waveguide 6 or may be composed of another member. If the same member is used, the clad portion 10 only needs to have a lower refractive index than the optical waveguide 6 in order to efficiently confine and propagate the light to be propagated in the optical waveguide 6.

  The waveguide hole 12 is an example of means for installing the optical waveguide member 14. An optical waveguide member 14 is installed in the waveguide hole 12, and the optical waveguide member 14 is a means for guiding a part of the light propagating to the optical waveguide 6 from the waveguide hole 12 to the outside of the cladding portion 10.

  According to such a configuration, if the light propagating through the optical waveguide 6 is L, a part of the light Lm reaching the waveguide hole 12 leaks to the optical waveguide member 14 and propagates from the cladding portion 10. Pulled out. That is, the light L is extracted from the light L to the light deriving unit 8 as leakage light Lm, and the light L can be monitored by detecting this light Lm.

  Next, with reference to FIG. 2, manufacture of the optical device 2 will be described. FIG. 2 shows an example of an optical device manufacturing process.

  In manufacturing the optical device 2, an optical fiber 4 is used as shown in FIG. The optical fiber 4 includes an optical waveguide 6 and a cladding portion 10 around the optical waveguide 6.

  In the optical fiber 4, as shown in FIG. 2B, a waveguide hole 12 is formed in a part of the cladding portion 10. The processing method of the waveguide hole 12 may be any one of dicing processing, laser processing, and etching processing, and may be other methods. The waveguide hole 12 may be constituted by a groove. The depth may be a depth at which leakage light is generated from the optical waveguide 6.

  Then, as shown in FIG. 2C, an optical waveguide member 14 is installed in the waveguide hole 12. The optical waveguide member 14 may be filled with a resin that allows light to pass through the waveguide hole 12 or may be inserted into the optical waveguide member. If this optical waveguide member 14 is installed in the waveguide hole 12, the light lead-out portion 8 is formed.

  In this way, the optical device 2 can be manufactured through the above steps, and the optical device 2 in-line with the optical fiber 4 constituting the optical wiring is obtained.

[Second Embodiment]

  The second embodiment is an optical device using a holey fiber for the optical fiber 4 and a light detection element (PD: Photo Detector) in the light derivation unit 8 and a manufacturing method thereof.

  The second embodiment will be described with reference to FIG. FIG. 3 shows an example of an optical device according to the second embodiment. In FIG. 3, the same parts as those in FIG.

  The optical device 2 of this embodiment is an example of the optical device of the present disclosure. As illustrated in FIG. 3, the holey fiber 16, the light derivation unit 8, the monitor PD (Photo Detector) 18, and the housing Part 20.

  The holey fiber 16 is an example of the optical fiber 4 described above, and is an optical waveguide means installed on the front stage or the rear stage side of a continuous optical wiring or an optical functional device. The light deriving unit 8 is an example of a unit that is formed in the holey fiber 16 and derives light propagating to the holey fiber 16. The monitor PD 18 is an example of a light detection unit that detects light guided to the light deriving unit 8 and converts the detected light into an electrical signal.

  The housing unit 20 is an example of a unit that surrounds and protects the light lead-out unit 8 and the monitor PD 18, and is an example of a unit that maintains the monitor PD 18 at the light detection position. A space portion 26 is provided between an inner wall portion of the housing portion 20, for example, the ceiling portion 22 and the light derivation surface 24 of the light derivation portion 8, and a monitor PD 18 fixed to the ceiling portion 22 is provided in the space portion 26. Built in. The light receiving unit 28 of the monitor PD 18 and the light deriving surface 24 of the light deriving unit 8 are opposed to each other, and the light Lm from the light deriving unit 8 is received by the light receiving unit 28 of the monitor PD 18. Accordingly, the light Lm is converted into an electric signal by the monitor PD 18. An external terminal 30 for taking out the monitor output is installed on the outer surface of the housing part 20, and the output signal of the monitor PD 18 is taken out as an optical monitor output to the external terminal 30.

  Next, the holey fiber 16 and the light derivation unit 8 will be described with reference to FIGS. 4 and 5. 4 shows a cross section in the axial direction of the light lead-out portion, and FIG. 5 shows a cross section taken along the line VV of FIG.

  The holey fiber 16 is an example of the above-described optical fiber 4 (FIG. 1), and includes a quartz-based core 32 and a clad part 10. The clad part 10 has a plurality of holes 34 extending in the axial direction. Is formed. The holey fiber 16 having the holes 34 is called a hole assist fiber. In this holey fiber 16, for example, the core 32 is made of highly refractive glass, and the cladding portion 10 is made of glass in which holes 34 are formed. Light confinement is obtained by the presence of the holes 34 and total reflection due to the refractive index difference. Optical waveguide is performed. That is, the holey fiber 16 is, for example, an optical fiber having a relative refractive index difference due to a difference in glass composition, and the relative refractive index difference is increased by lowering the effective refractive index of the cladding portion 10 by the air holes 34. Structure. That is, the core 32 constitutes the optical waveguide 6 described above.

  In this holey fiber 16, for example, the core 32 is formed with a diameter of 10 [micron] and the cladding part 10 is formed with a diameter of about 125 [micron], and the portion of this cladding part 10 has a diameter of about 8 [micron] to about 13 [micron]. For example, the holes 34 are formed at a pitch of 15 [microns].

  A waveguide hole 12 is formed in the holey fiber 16 in a direction intersecting with the core 32 from the side surface portion of the cladding portion 10. The waveguide hole 12 is an opening or a groove. In this embodiment, the waveguide hole 12 is formed in a direction perpendicular to the axial direction of the core 32 and reaches a hole 34 existing in the cladding 10 around the core 32. ing. The waveguide hole 12 is filled with, for example, a light transmissive resin 44 (FIG. 7) as the optical waveguide member 14. The optical waveguide member 14 extends from the waveguide hole 12 to the air hole 34 and constitutes a light derivation unit 8 that is an optical path for guiding leakage light from the core 32.

  In this case, the holey fiber 16 has a configuration in which six holes 34 are arranged as a plurality of holes around the core 32, but as shown in FIG. It is good also as a structure which installed the several void | hole also outside. Then, a plurality of, for example, two air holes 34 in the center direction of the core 32 may be connected by the waveguide hole 12 to constitute the light derivation unit 8.

  Next, manufacturing of the optical device 2 will be described with reference to FIG. FIG. 7 shows an example of an optical device manufacturing process.

  (1) Drilling process

  A waveguide hole 12 is formed in the holey fiber 16. The waveguide hole 12 is a resin-filled hole. In this drilling step, the waveguide hole 12 is formed in the holey fiber 16 to expose the air holes 34 of the cladding portion 10.

  For example, as shown in FIG. 7A, the laser emitting portion 40 is installed on the side surface portion of the holey fiber 16, and the formation position of the waveguide hole 12 is irradiated with the laser light 42 to form the waveguide hole 12. The waveguide hole 12 is formed toward the center of the core 32 of the holey fiber 16 and has a depth that reaches the hole 34. In the waveguide hole 12, as shown in FIG. 7B, the air hole 34 is exposed from the waveguide hole 12. The waveguide hole 12 may be formed by mechanical machining such as dicing, CO laser irradiation, excimer laser irradiation, or the like, or glass etching.

  (2) Resin filling process

  The waveguide hole 12 formed by laser processing in this manner is filled with a liquid light-transmitting resin 44 as shown in FIG. For this resin filling, the dispenser syringe 46 is positioned in the waveguide hole 12, and an amount of light transmitting resin 44 that fills the waveguide hole 12 is dropped into the waveguide hole 12 and filled. The dropped light transmitting resin 44 is injected into the waveguide hole 12 and the hole 34 on the bottom side thereof by capillary action.

  The light transmissive resin 44 may be an ultraviolet curable resin or a thermosetting resin. Further, filling means other than the dispenser syringe 46 may be used for the resin filling. For example, if a flexible resin having a glass transition temperature Tg of 0 [° C.] or less is used as the light transmissive resin 44, the relative refractive index difference between the filled portion of the light transmissive resin 44 and the core 32 becomes small. The leakage light Lm can be guided to the side surface of the holey fiber 16 through the light transmissive resin 44.

  (3) Resin curing process

  When an ultraviolet curable resin is used as the light transmissive resin 44, as shown in FIG. 7D, the light transmissive resin 44 filled in the waveguide hole 12 is irradiated with ultraviolet (UV) light 48. The light transmissive resin 44 is cured. For the irradiation of the UV light 48, the UV emitting unit 50 is positioned at a spaced position on the circumferential surface side of the holey fiber 16, and the UV light 48 is emitted from the UV emitting unit 50 toward the light transmissive resin 44. In this case, if the light-transmitting resin 44 is a thermosetting resin, it may be cured by heating after filling the resin.

  (4) Assembly and exterior process

  As shown in FIG. 3, the holey fiber 16 in which the light derivation unit 8 is formed is provided with the above-described casing unit 20 and the monitor PD 18 is disposed with respect to the light derivation unit 8. Device 2 (FIG. 3) is obtained.

  Next, the optical monitoring function of the optical device 2 will be described with reference to FIG. In FIG. 8A, the core 32 of the holey fiber 16 is the optical waveguide 6 described above, and the light L propagates therethrough. The light L is totally reflected on the air hole 34 side and is prevented from flowing out into the cladding portion 10.

  When the propagating light L reaches the light deriving portion 8 as shown in FIG. 8B, a part of the light Lm enters the optical waveguide member 14 in the waveguide hole 12, and the outside of the holey fiber 16. Led to. That is, the light monitoring function of the light deriving unit 8 is obtained.

  More specifically, the light-transmitting resin 44 in the light derivation section 8 flows from the waveguide hole 12 into the hole 34 and hardens, closes the hole 34, and has a refractive index at the peripheral portion. Is changing. That is, the light refractive index of the light transmissive resin 44 is different from the air in the holes 34. Due to the difference in the optical refractive index, the light confinement effect due to the total reflection around the core 32 is reduced (decrease in the light confinement effect), and the optical waveguide member 14 made of the light-transmitting resin 44 leads to the waveguide hole 12 side. Leakage light Lm is generated. In this way, a branching structure for branching the light Lm from the propagating light L is configured, and the light deriving unit 8 has a monitoring function for the light L.

  In addition, as shown in FIG. 9, the light derivation | leading-out part 8 may be the structure inclined by angle (theta). For example, the angle θ is set to be smaller than an angle 90 degrees (θ <90) with respect to the axial direction of the core 32 of the light guide unit 8.

  Moreover, the light derivation | leading-out part 8 may be comprised by single as shown to A and B of FIG. 10, and plural may be sufficient as it. In that case, as shown in FIG. 11A, a plurality of light guide portions 8 may be formed in the diameter direction of the holey fiber 16 for each hole 34, or as shown in FIG. 11B, the holey fiber 16. A plurality of light derivation portions 8 may be formed in the axial direction. As described above, if the number of waveguide holes 12 is increased, the amount of monitor light can be increased and the light branching ratio can be increased depending on the number of installed light guide portions 8.

  The effects of this embodiment are listed as follows.

  (1) The optical device 2 can be installed in the middle of the fiber wiring, and this optical device 2 can constitute an optical monitor device in an in-line type. In other words, the splicing for branching and the extra fiber processing space are not required, the monitor device can be made smaller, and the functional device unit and module can be made smaller.

  (2) Since, for example, a groove or a hole can be formed as a waveguide hole 12 in the middle of the fiber to configure the optical device 2 having an optical monitoring function, the optical device 2 is configured at an arbitrary position on the optical wiring. This increases the degree of freedom in designing optical wiring and optical devices such as monitor installation.

  (3) For example, a holey fiber with an inline optical monitor provided with the optical device 2 may be used by being spliced with an SM fiber.

  (4) If a light-receiving element for monitoring (monitor PD 18) is installed outside the light lead-out unit 8, and the leakage light Lm is detected on this light-receiving surface, the branched light Lm can be converted into an electrical signal. Thereby, the light L propagating to the holey fiber 16 can be monitored by the light Lm.

  (5) The number and quantity of derived light can be increased by the number of waveguide holes 12, and the quantity and branching ratio of derived light can be increased.

  (6) In the above embodiment, an optical fiber such as the holey fiber 16 having a plurality of holes 34 extending in the axial direction is used for the cladding portion 10, which is composed of the quartz-based core 32 and the cladding portion 10. A waveguide hole 12 is formed which communicates with a hole 34 existing in the cladding portion 10 around the core 32. The waveguide hole 12 is filled with a light transmissive resin 44, and the light Lm leaking from the core 32 through the light derivation unit 8 is monitored by changing the refractive index distribution around the core 32 and changing the optical waveguide state. An optical monitor structure that can be detected as light is configured.

[Third Embodiment]

  The third embodiment has a configuration in which the light derivation unit and the number of light detections are made plural.

  The third embodiment will be described with reference to FIG. FIG. 12 shows an example of an optical device according to the third embodiment. 12, the same parts as those in FIG. 3 are denoted by the same reference numerals.

  The optical device 2 of this embodiment is an example of the optical device of the present disclosure. In the optical device 2 (FIG. 3) described above, the optical device 2 is a single light derivation unit 8, whereas FIG. As described above, the light derivation units 801, 802, 803, 804, 805, and 806 are installed as a plurality of light derivation units. The light transmissive resin 44 constituting each optical waveguide member 14 of each of the light guide portions 801 to 806 is connected in the hole 34 and closes some of the holes 34.

  The light derivation units 801 to 806 are provided with six sets of monitor PDs 18 as light detection means for individually detecting each leakage light Lm, and constitute a monitor PD array 52. In this embodiment, the monitor PD array 52 is installed. However, the monitor PD array 52 may be constituted by only the individual monitor PD 18.

  In such a configuration, as shown in FIG. 13, leakage light Lm from the optical waveguide 6 is extracted from each light deriving unit 801 to 806, detected by the monitor PD array 52, and obtained by each light deriving unit 801 to 806. The leaked light Lm can be converted into an electric signal and taken out from the external terminal 30.

  In this optical device 2, a plurality of waveguide holes 12 can be formed to guide a large number of leaked lights Lm, and the light intensity can be monitored by receiving light by the monitor PD 18 or the monitor PD array 52 of a plurality of channels. The intensity of leakage light can be adjusted by the number of perforations in the waveguide hole 12, and the branching ratio can be adjusted.

  Also in this embodiment, the above-described optical fiber (holey fiber 16) is used to form a plurality of waveguide holes 12 that reach the air holes 34 from the side surfaces and to fill the light-transmitting resin 44 described above. Since the manufacturing method using the steps such as curing is as described above, the description thereof is omitted.

[Fourth Embodiment]

  The fourth embodiment is configured to extract the light guided to the light deriving unit through a filter.

  The fourth embodiment will be described with reference to FIG. 14 and FIG. FIG. 14 shows an example of an optical device according to the fourth embodiment, and FIG. 15 shows filter characteristics. 14, the same parts as those in FIG. 3 or FIG.

  The optical device 2 of this embodiment is an example of the optical device of the present disclosure, and a plurality of light deriving units 8 such as a plurality of light deriving units 801, 802. As described above, a plurality of monitor lights can be obtained. Therefore, for example, wavelength selection filters 541, 542, 543, 544, 545, and 546 are installed as filters on the light guide surfaces 24 of the light guide portions 801, 802,. The wavelength may be selected.

  With this configuration, the light wavelength selected by the wavelength selection filters 541 to 546 can be received by the monitor PD 18 and the light intensity can be monitored for each wavelength.

  The wavelength selective filters 541 to 546 include, for example, a low-pass filter having a low-pass characteristic as shown in FIG. 15A, a high-pass filter as shown in FIG. A high-pass filter having a band-pass characteristic or a band-pass filter having a band-pass characteristic as shown in FIG. 15C may be used. For example, if a filter that can selectively pass the 1.3 [micron] band, 1.55 [micron] band, and 0.85 [micron] band used for optical communication is detected, the light intensity at a desired wavelength is detected, Can be monitored.

  Since other configurations and manufacturing methods are the same as those of the above-described embodiment, the description thereof is omitted.

[Fifth Embodiment]

  The fifth embodiment is a configuration of an optical device in which an optical fiber is provided with a coaxial ferrule.

  The fifth embodiment will be described with reference to FIG. FIG. 16 shows an example of the light deriving unit of the optical device according to the fifth embodiment. In FIG. 16, the same parts as those in FIG.

  The light deriving unit 8 of the optical device 2 is an example of the optical device of the present disclosure, and includes a coaxial ferrule 56 around the holey fiber 16 as shown in FIG. The ferrule 56 is an example of a coupling means for the holey fiber 16. In the above embodiment, the waveguide hole 12 as the waveguide hole is formed in the optical fiber 4 or the holey fiber 16, but the waveguide hole 12 is formed in the holey fiber 16 from the outside of the ferrule 56 provided coaxially with the holey fiber 16. , And an optical waveguide member 14 may be formed in the waveguide hole 12 to constitute the light guide portion 8. In this case, the waveguide hole 12 may be formed to a depth up to the hole 34 as described above. Then, the optical waveguide member 14 may be filled and cured with the light transmissive resin 44. Moreover, you may comprise the light derivation | leading-out part 8 with single or multiple.

[Sixth Embodiment]

  The sixth embodiment discloses the configuration of the exterior case of the optical device and the internal configuration of the exterior case.

  With respect to the sixth embodiment, reference is made to FIGS. FIG. 17 shows an example of the outer case of the optical device according to the sixth embodiment, and FIGS. 18 and 19 show an example of the internal configuration of the outer case.

  As shown in FIG. 17, the optical device 2 is built in the exterior case 58, and the end face in the axial direction is sealed with a sealing resin 60. The exterior case 58 is an example of exterior means that covers the light guide unit 8, the monitor PD 18, and the housing unit 20 described above. The sealing resin 60 seals the end surface of the outer case 58 and constitutes a part of the outer case 58 to protect the inside of the outer case 58. In this embodiment, the rectangular cylindrical outer case 58 is used, but a cylindrical body coaxial with the holey fiber 16 may be used. A casing or a round coaxial type casing is possible. The external terminal 30 described above is installed on the side of the exterior case 58, and the monitor PD 18 is taken out.

  In addition, as shown in FIG. 18, the optical device 2 includes a housing portion 20 inside an outer case 58, and the housing portion 20 includes a mount portion 62 for positioning the holey fiber 16. . The mount portion 62 is an example of means for holding the holey fiber 16, and a positioning portion 64 having a V-shaped cross section for positioning the holey fiber 16 is formed. In this embodiment, a ferrule 56 is attached to the holey fiber 16, the ferrule 56 coaxial with the holey fiber 16 is positioned at the positioning portion 64, and is firmly fixed to the mount portion 62 by a fixing member 68 such as an adhesive. ing.

  The light outlet 8 formed on the holey fiber 16 and the ferrule 56 is directed to the ceiling surface side of the outer case 58. The monitor PD 18 is installed on the mount portion 66 of the housing unit 20, and the light receiving unit 28 of the monitor PD 18 faces the light guide surface 24 of the light guide unit 8. In this embodiment, an external terminal 30 is installed on each side surface portion of the exterior case 58, and an optical monitor output is obtained.

  In such a configuration, the casing 20 is installed inside the outer case 58, and the monitor PD 18 and the holey fiber 16 are firmly fixed. Since the light receiving unit 28 of the monitor PD 18 is positioned with high accuracy on the light deriving surface 24 of the light deriving unit 8, leakage light propagating to the optical waveguide member 14 can be taken out with high accuracy and monitored by the monitor PD 18.

  Further, in the optical device 2 in which the plurality of light guide portions 8 are installed on the holey fiber 16 and the ferrule 56, the holey fiber 16 is positioned on the mount portion 62 together with the ferrule 56 and fixed by the fixing member 68, as shown in FIG. 19. can do.

  In the circumferential direction of the holey fiber 16, a plurality of light outlets 8 are arranged radially at a constant angle, and a plurality of monitors PD 18 are installed as light detection means for individually detecting light. In this case, the mount portion 66 fixed to the outer case 58 includes mount surfaces 70A, 70B, and 70C for arranging the light guide surface 24 of the light guide portion 8 in parallel with the light receiving portion 28 of the monitor PD 18. It is formed corresponding to an angle of 8. The light receiving unit 28 of the monitor PD 18 mounted on each of the mount surfaces 70A, 70B, and 70C is disposed in parallel with the light deriving surface 24 of the light deriving unit 8. Therefore, the light guided to the light output surface 24 can be efficiently received by each monitor PD 18 and converted into an electrical signal. This electrical signal can be taken out from the external terminal 30.

[Seventh Embodiment]

  In the seventh embodiment, the optical device 2 is configured by using a fiber Bragg grating (FBG) having a function of an optical filter in which a diffraction grating is formed in the core of an optical fiber.

  With reference to FIGS. 20 and 21, the seventh embodiment will be described. FIG. 20 shows an example of an optical device according to the seventh embodiment, and FIG. 21 shows an example of an optical fiber used in the optical device.

  In the optical device 2, an optical fiber 74 including a plurality of optical fiber Bragg grating (FBG) portions 721, 722, 723, and 724 is used for the core 32, and the formation portions of the FBG portions 721, 722, 723, and 724 are used. A plurality of light lead-out portions 801, 802, 803, 804 are formed in the cladding portion 10 covering the surface. In this embodiment, a light deriving unit 801 at the front of the FBG unit 721, a light deriving unit 802 between the FBG unit 721 and the FBG unit 722, and a light deriving unit 803 between the FBG unit 722 and the FBG unit 723, A light derivation unit 804 is installed between the FBG unit 723 and the FBG unit 724. The light guide portions 801, 802, 803, and 804 are arranged in the axial direction of the core 32, and the optical waveguide member 14 is installed in the waveguide hole 12.

  In each of the FBG portions 721 to 724, the optical waveguide member 14 is installed in the waveguide hole 12 around the core 32, that is, the refractive index distribution around the core 32 is changed by filling with the light transmissive resin 44. The optical waveguide state is changed. As a result, the light whose wavelength is selected in each part of each FBG 721, 722, 723, 724 leaks from the core 32 to the optical waveguide member 14 side, is derived from the light deriving units 801 to 804, and is individually provided to the monitor PD 18 as monitor light Detected.

In the configuration in which the core 32 includes the FBG portion 72, as shown in FIG. 21A, the FBG portion 72 is a portion where an interference fringe is formed, and this interference fringe changes the refractive index. Therefore, when propagating light L ₁ to the optical fiber 74, light of wavelength λa selected by FBG section 72 is folded, it is possible to pass wavelengths other than the wavelength λa light Lm, the light L _2. For this reason, if the light deriving unit 8 is formed in a portion that allows light Lm having a wavelength other than the wavelength λa to pass through, the light Lm other than the wavelength λa can be extracted and monitored.

For example, in the configuration including the FBG portions 721 and 722, as shown in FIG. 21B, the FBG portion 721 and the FBG portion 722 are formed in the core 32, and light is transmitted between the FBG portion 721 and the FBG portion 722. A light derivation unit 802 is formed on the downstream side of the derivation unit 801 and the FBG unit 722. In this case, when the light L ₁ including the wavelengths λa and λb is propagated to the optical fiber 74, the light of the wavelength λa is folded back by the FBG unit 721 in the FBG unit 721, and the light of the wavelength λb that has passed through the FBG unit 721 is Wrapped at 722. As a result, light Lm ₂ and light L ₂ other than the wavelengths λa and λb are obtained on the downstream side of the FBG unit 722. Therefore, light Lm ₁ having a wavelength other than the wavelength λa is extracted from the light deriving unit 801, and light Lm ₂ having a wavelength other than the wavelengths λa and λb is extracted and monitored by the light deriving unit 802.

  With such a configuration, it is possible to detect and monitor a specific wavelength while removing it in stages, and to detect light intensity that does not include the specific wavelength.

[Eighth Embodiment]

  In the eighth embodiment, the refractive index of the light lead-out portion of the optical device is adjusted by the optical waveguide member.

  The eighth embodiment will be described with reference to FIG. FIG. 22 shows the refractive index change characteristic.

  22A shows a refractive index characteristic in which the refractive index changes abruptly according to the axial distance from the center between the core equivalent portion and the clad portion (SMF: Single Mode optical Fiber).

  FIG. 22B shows a refractive index characteristic in which the refractive index changes linearly according to the axial distance from the center between the core equivalent portion and the cladding portion (MMF: Multi Mode Optical Fiber).

  Further, in C of FIG. 22, the refractive index characteristics in which the refractive index changes rapidly according to the axial distance from the center between the core equivalent portion and the cladding portion, as indicated by arrows a and b, The refractive index of the light transmitting resin 44 used for the wave member 14 is adjusted or selected.

For example, in the filling step of the light transmissive resin 44 (C in FIG. 7), the refractive index ratio in which the refractive index of the core 32 or its equivalent and the light transmissive resin 44 filled in the waveguide hole 12 satisfies the total reflection condition. The refractive index of the light-transmitting resin 44 is selected within a range in which a smaller refractive index ratio is obtained, and the increase / decrease in leakage light is adjusted. In this case, the refractive index magnitude relationship is, for example,
The relationship of the refractive index of the core 32 or its corresponding part> the refractive index of the light-transmitting resin 44> the refractive index of the cladding 10 may be established.

  Thus, by adjusting the refractive index of the light-transmitting resin 44 filled in the waveguide hole 12, the amount of light leaked from the light derivation section 8 (FIGS. 3 and 5) can be increased and decreased, and the amount of light can be adjusted. For example, if a light-transmitting resin 44 having a refractive index close to that of the core 32 is used, leakage light can be increased, and conversely, a light-transmitting resin having a refractive index close to the refractive index of the cladding portion 10. If 44 is used, leakage light can be reduced.

  With such a configuration, the amount of monitor light can be increased or decreased by adjusting the refractive index of the light transmissive resin 44, that is, the refractive index of the optical waveguide member 14, and can be adjusted to a desired light amount.

[Ninth Embodiment]

  In the ninth embodiment, the monitor light amount is adjusted by adjusting the angle of the light derivation unit.

  The ninth embodiment will be described with reference to FIG. FIG. 23 shows a plurality of light derivation units having different angles.

As shown in FIG. 23, the optical device 2 of this embodiment includes a plurality of light derivation units 831, 832, and 833, and the light derivation units 831, 832, and 833 have different inclinations with respect to the axial direction of the core 32. Angles θ ₁ , θ ₂ , and θ ₃ (θ ₁ <θ ₂ <θ ₃ ) are set.

In this case, the following relationship holds for the tilt angle θ, the total reflection angle, and the refractive index. That is,
(1) θ = arcsin (core equivalent partial refractive index / resin refractive index) <total reflection angle
(2) Core equivalent partial refractive index> resin refractive index> cladding portion refractive index. However, θ = θ ₁ , θ = θ ₂ , and θ = θ ₃ .

  The inclination angle θ is obtained from the refractive index of the light-transmitting resin 44 to be used and the refractive index of the portion corresponding to the core. Therefore, if the angle θ of the light deriving portions 831, 832, and 833, that is, the angle θ that forms the waveguide hole 12 is adjusted within the range of the total reflection angle or less, the leaked light guided to the light deriving portions 831, 832, and 833. The monitor light quantity can be adjusted by changing the mode.

In this embodiment, a single optical device 2 is provided with a plurality of light derivation units 831, 832, and 833 in which different angles θ ₁ , θ ₂ , and θ ₃ are set. May be set in the light derivation unit 8 to adjust the monitor light amount for each optical device 2.

[Tenth embodiment]

  The tenth embodiment is an optical device using a photonic band gap fiber (PBF) or a photonic crystal fiber (PCF) as an optical waveguide. As described above, an optical fiber having holes is called a holey fiber or a hole assist fiber. In addition to this, a PBF having a hollow hole in the center and regularly having a large number of holes extending in the axial direction in the central portion including the center, and a large number of holes extending in the axial direction in the central portion excluding the center are regular. There is PCF or the like as a fiber included in the above. An optical monitor structure can be realized in the same manner even when such a PBF or PCF is used.

  The tenth embodiment will be described with reference to FIG. FIG. 24 shows a cross section of the light lead-out portion of the optical device.

  In the optical device 2 of this embodiment, a PBF 76 is used for the optical fiber 4 as shown in FIG. The PBF 76 is a fiber that confines and controls light by a photonic band gap (PBG) structure. The PBF 76 has a hole 78 in the center and a hole 34. In this embodiment, the light deriving unit 8 that reaches the outermost hole 34 is formed, and the light propagating to the PBF 76 is derived to the light deriving unit 8 and monitored by the above-described configuration. Other configurations are the same as those in the above embodiment, and thus the description thereof is omitted.

  As another configuration example of the optical device 2, a PCF 80 is used for the optical fiber 4 as shown in FIG. The PCF 80 is a fiber in which the concept of a photonic crystal is applied to an optical fiber, and is provided with an array structure of holes in quartz. The PCF 80 does not have the hole 78 in the center unlike the PBF 76, but similarly, a plurality of holes 34 are formed, and in this embodiment, the light derivation unit in which the plurality of holes 34 are connected in the center direction. 8 is formed. Light propagating to the PCF 80 is guided to the light deriving unit 8 and monitored by the above-described configuration. Other configurations are the same as those in the above embodiment, and thus the description thereof is omitted.

[Eleventh embodiment]

  The eleventh embodiment is an optical monitor system including the above-described optical device.

  The eleventh embodiment will be described with reference to FIG. FIG. 25 shows an example of an optical monitor system according to the eleventh embodiment.

  As shown in FIG. 25A, the optical monitor system 82 is configured by an optical fiber 4 constituting an optical wiring including a functional device 84, and the above-described optical device 2 is installed as a monitor device on the front side of the functional device 84. Has been. The configuration of the optical device 2 is as described in the above embodiment, and any configuration may be used. The optical device 2 is installed in-line on the optical fiber 4 that propagates light to the functional device 84.

  In such a configuration, the light that enters the functional device 84 can be monitored by the optical device 2 on the front side thereof, and the light intensity that enters the functional device 84 can be detected.

  In addition, since the optical device 2 is inlined in the optical fiber 4 that propagates light to the functional device 84, the optical monitor structure can be simplified, the size can be reduced, and the space can be saved. it can.

  When monitoring light incident on the functional device 84, the optical device 2 is installed on the front side of the functional device 84. However, as shown in FIG. 25B, the optical device 2 is installed on the rear side of the functional device 84. May be. In such a configuration, light passing through the functional device 84 or amplified light can be monitored and its light intensity detected.

[Twelfth embodiment]

  The twelfth embodiment is an optical device manufacturing method in which an optical waveguide hole is formed by dicing.

  FIG. 26 is referred to for the twelfth embodiment. FIG. 26 shows an example of a method for processing a waveguide hole according to the twelfth embodiment.

  The processing method of the waveguide hole 12 is an example of the manufacturing method of the optical device of the present disclosure, and is an example of the above-described drilling process.

In the above embodiment, the circular waveguide hole 12 is illustrated, but the waveguide hole 12 may be groove-shaped. When the groove-shaped waveguide hole 12 is formed, as shown in FIGS. 26A and 26B, it rotates from the outer side of the ferrule 56 coaxially installed in the holey fiber 16 to the position where the light guide portion 8 is formed. What is necessary is just to cut by applying the processing blades 86 and 88. In this case, if the widths W ₁ and W ₂ (W ₁ > W ₂ ) of the machining blades 86 and 88 are made different, a plurality of waveguide holes 12A and 12B having different numerical apertures (NA) can be formed. If the light deriving unit 8 is configured by the waveguide holes 12A and 12B having different numerical apertures, the optical device 2 in which the monitor light amount is changed by the opening width can be manufactured.

  With such a configuration, the width of the groove filling the light-transmitting resin 44, that is, the width of the waveguide hole 12 can be adjusted at the time of dicing, and the size of the waveguide hole 12 that is an optical path for guiding leaked light from the core 32 can be adjusted. You can adjust the monitor light amount.

  Further, as shown in FIGS. 27A and 27B, the waveguide hole 12 may use a single processing blade 90 having a constant width W. In this case, a plurality of waveguide holes 12 are formed at regular intervals or different intervals, and the light-transmitting resin 44 described above is filled in the waveguide holes 12, so that a plurality of light derivation portions 8 can be configured.

Next, in the dicing processing of the waveguide hole 12, as shown in FIG. 28, the cutting depth d of the processing blade 90 with respect to the holey fiber 16 is set to the depth d ₁ reaching the single hole 34, and A groove-shaped waveguide hole 12 reaching one hole 34 may be formed.

Further, as shown in FIG. 29A, the cutting blade 90 is set to the cutting depth d ₂ (> d ₁ ) so as to straddle the plurality of holes 34, and the groove-shaped waveguide hole 12 is formed. May be. In this case, as shown in FIG. 29B, the light guide portion 8 may be formed by filling and connecting the light transmitting resin 44 between the plurality of holes 34 exposed in the waveguide hole 12.

  With such a configuration, the number of holes 34 filled with the light transmissive resin 44 can be changed and adjusted according to the cutting depth d of the processing blade 90, and the amount of monitor light can be adjusted.

  [Thirteenth embodiment]

  The thirteenth embodiment is an optical device manufacturing method in which an optical waveguide hole is formed by laser processing.

  FIG. 30 is referred to for the thirteenth embodiment. FIG. 30 shows an example of a method for processing a waveguide hole according to the thirteenth embodiment.

  The processing method of the waveguide hole 12 is an example of the manufacturing method of the optical device of the present disclosure, and is an example of the above-described drilling process.

In processing the waveguide hole 12, spot-like laser irradiation is used. As shown in FIG. 30A, the laser emitting portion 40 is positioned on the side surface of the holey fiber 16, and the laser emitting portion 40 is positioned on the holey fiber 16. The waveguide hole 12 is formed by irradiating the laser beam 42 at regular intervals. In this case, by varying the spot diameter φ of the laser beam 42 to be irradiated, the waveguide holes 12 having different hole diameters φ ₁ and φ ₂ (<φ ₁ ) can be formed, and the hole diameter can be controlled. Further, the intensity and irradiation time of the laser light 42 are adjusted so that the waveguide hole 12 reaches the hole 34.

  With such a configuration, the diameter of the waveguide hole 12 filled with the light transmissive resin 44 can be adjusted during laser processing, and similarly, the optical path through which the leaked light from the core 32 is guided, that is, the size of the waveguide hole 12 is set. Adjust the monitor light intensity.

[Fourteenth embodiment]

  The fourteenth embodiment is an optical device manufacturing method in which an optical waveguide hole is formed by etching.

  The fourteenth embodiment will be described with reference to FIGS. 31 and 32. FIG. 31 and 32 show an example of a method for processing a waveguide hole according to the fourteenth embodiment.

  The processing method of the waveguide hole 12 is an example of the manufacturing method of the optical device of the present disclosure, and is an example of the above-described drilling process.

  In the holey fiber 16 in which the coaxial ferrule 56 is installed on the outer surface portion, the ferrule 56 can be used as a mask for the etching process. Therefore, as shown in FIGS. 31A and 31B, the waveguide hole 12 is formed in the ferrule 56 in accordance with the position and number of the waveguide holes 12 formed. In the etching process, if the ferrule 56 is a glass ferrule, for example, a chemical etching process may be performed using nitric hydrofluoric acid or the like as an etching agent.

  When the etching agent is loaded into the waveguide hole 12 formed in the ferrule 56, the cladding portion 10 of the holey fiber 16 inside the ferrule 56 is chemically etched as shown in FIG. The etching processing portion 92 is a chemically etched glass portion, which extends from the terminal end portion of the waveguide hole 12 of the ferrule 56 to the cladding portion 10 of the holey fiber 16 in a fan shape and reaches the hole 34. . This etching processing part 92 constitutes the waveguide hole 12. Therefore, if the waveguide hole 12 is filled with the light-transmitting resin 44, the light deriving portion 8 can be configured as shown in FIG.

  In such a configuration, with the waveguide hole 12 opened in the ferrule 56 as a mask, the internal glass ferrule can be chemically etched and propagated to the waveguide hole 12 reaching the hole 34 on the holey fiber 16 side. And the hole diameter of the waveguide hole 12 can be arbitrarily adjusted by cutting, and a numerical aperture (NA) can be changed.

  The opening width of the waveguide hole 12 can be adjusted at the time of glass etching. As a result, the amount of monitor light can be adjusted by adjusting the optical path of light leaked from the core and the size of the waveguide hole 12.

  Since other configurations are the same as those in the above embodiment, the same reference numerals are given and description thereof is omitted.

[Other Embodiments]

  (1) Although the holey fiber 16 has been exemplified in the above embodiment, other optical fibers may be used.

  (2) In the above embodiment, the light guide portion 8 is configured by filling the waveguide hole 12 with the light transmissive resin 44. However, the light guide portion 8 is configured by installing an optical fiber in the waveguide hole 12. May be. In the case of installing this optical fiber, the light-transmitting resin 44 may be used together so that the waveguide hole 12 and the inserted optical fiber are integrated or integrated with the air hole 34.

  (3) In the above embodiment, the optical device 2 of the present disclosure is installed at the front part and the rear part of the functional device 84. However, the above-described optical device 2 is configured in an optical fiber inside the functional device 84. May be.

  (4) In the above embodiment, the optical fiber including the core 32 and the hole 34 is illustrated, but the optical fiber used in the optical device of the present disclosure includes the optical fiber including the core 32 and the hole 34. It is not limited to optical fiber.

[Comparative example]

  The comparative example relates to the optical device of the present disclosure and the manufacturing method thereof, and refers to an optical device and an optical monitor system as background art.

  In an optical high-speed and large-capacity communication system, optical devices having optical monitoring and adjustment functions such as a monitoring TAP-PD, a polarization controller, and an optical attenuator are used. This optical device is connected via a splice, an adapter, and an optical cord, and constitutes a system that extracts monitor light from carrier light.

  In long-distance transmission of light or wavelength division multiplexing transmission, multiplexing / demultiplexing is frequently performed. In order to compensate for optical attenuation due to this multiplexing / demultiplexing, transmission is performed with a high light intensity. For this reason, confirmation of the transmitted light intensity is indispensable.

  In a unit, line card, or module that supports an optical transmission system, a functional device is connected to an optical waveguide. If light having excessive light intensity enters the functional device, the functional device may be destroyed. For this reason, it is necessary to check the light intensity of the input light of the functional device and protect the functional device from destruction due to excessive light intensity.

  Therefore, a coupler branch is provided before the input of the functional device, the light from this branch is monitored to check the light intensity incident on the functional device, and the light intensity exceeding the allowable range of the functional device is attenuated by the attenuator. Is adjusted to a light intensity within an allowable range. With such a configuration, the functional device can be prevented from being destroyed.

  However, a branch coupler and a monitor for protecting the functional device must be installed before the input of the functional device, and a storage space for that purpose must be secured. In addition, in a WDM (wavelength multiplexing) system that uses light of multiple wavelengths, the accommodation space is required by the number of wavelengths, which hinders downsizing of units and modules.

  Such a problem is caused by the optical device 2 and its manufacturing method (FIGS. 1 to 24), the optical monitor system 82 (FIG. 25), and the manufacturing method of the optical device 2 (FIGS. 26 to 32) disclosed in the above embodiment. Can be solved.

  In the comparative example, as shown in FIG. 33, when monitoring light propagating to the optical fiber 4 to which the functional device 84 is connected, the monitor device 94 must be installed by branching the optical fiber 4. Further, a branching device 96 must be installed at the branch of the optical fiber 4. For this reason, in the configuration of the comparative example, the configuration of the optical monitor is complicated, which hinders downsizing of the system. Such a problem can be omitted because the optical device of the present disclosure enables the optical fiber 4 to be inlined, and the equipment such as the branching device 96 is also inlined with the optical device 2.

  Next, the following additional notes will be disclosed with respect to the embodiment including the above-described examples. The present invention is not limited to the following supplementary notes.

(Supplementary Note 1) A light deriving unit for deriving light from the optical waveguide in a direction intersecting with the axial direction of the optical waveguide for guiding light, the light deriving unit comprising:
A single or a plurality of waveguide holes formed in the cladding portion covering the optical waveguide;
An optical waveguide member installed in the waveguide hole and guiding light from the optical waveguide;
An optical device comprising:

(Additional remark 2) The said waveguide hole is a groove | channel or opening which is formed in the said cladding part and leaks light from the said optical waveguide, The optical device of Additional remark 1 characterized by the above-mentioned.

(Additional remark 3) The optical device of Additional remark 1 characterized by making light leak from the said optical waveguide to the said light derivation | leading-out part by changing the optical waveguide state of the light which propagates the said optical waveguide.

(Supplementary note 4) The optical device according to supplementary note 1, wherein the light extraction angle of the light derivation unit has an inclination angle with respect to an axial direction of the optical waveguide.

(Additional remark 5) The said optical waveguide is an optical fiber, The optical device of Additional remark 1 characterized by the above-mentioned.

(Supplementary note 6) The optical device according to supplementary note 1, wherein the optical waveguide member is a resin filled in the waveguide hole or an optical fiber inserted into the waveguide hole.

(Additional remark 7) Furthermore, the photon detection element which detects the light guide | induced to the said light derivation | leading-out part,
The optical device according to appendix 1, wherein the optical device is provided.

(Additional remark 8) The filter which allows the light of a specific zone | band or a specific wavelength to pass from the light guide | induced to the said light derivation | leading-out part,
The optical device according to appendix 1, wherein the optical device is provided.

(Additional remark 9) Furthermore, the ferrule or housing | casing part which covers the said light derivation | leading-out part,
The optical device according to appendix 1, wherein the optical device is provided.

(Supplementary note 10) The optical device according to supplementary note 1, wherein a propagation light amount of the monitor light is adjusted according to a number of the waveguide holes or a cross section of the optical waveguide.

(Additional remark 11) The said optical derivation | leading-out part is installed in the grating part of the said optical waveguide, or the vicinity part of this grating part, The optical device of Additional remark 1 characterized by the above-mentioned.

(Supplementary Note 12) An optical waveguide connected to the optical functional device;
An optical device that is installed in the optical waveguide on the front side or the rear side of the optical functional device, and that extracts light guided by the optical waveguide;
The optical device has a single or a plurality of waveguide holes formed in a cladding portion covering the optical waveguide;
An optical waveguide member that is installed in the waveguide hole and guides light from the optical waveguide;
An optical monitor system comprising:

(Supplementary note 13) An optical monitoring system, wherein the optical device is the optical device described in supplementary notes 1 to 11.

(Additional remark 14) The process of forming a single or several waveguide hole in the clad part installed around the optical waveguide and shielding light,
Installing an optical waveguide member in the waveguide hole;
An optical device manufacturing method comprising:

(Supplementary note 15) The method for manufacturing an optical device according to supplementary note 14, wherein the waveguide hole is formed in the clad portion including the clad portion or the ferrule by dicing, laser processing, or etching.

(Supplementary note 16) The method for manufacturing an optical device according to supplementary note 14, wherein the light guide part is formed by filling the waveguide hole with a resin having light transmissivity or installing an optical fiber.

As described above, the most preferred embodiments of the optical device, the optical monitor system, and the optical device manufacturing method have been described. However, the present invention is not limited to the above description, and is described in the claims. It goes without saying that various modifications and changes can be made by those skilled in the art based on the gist of the invention disclosed in the embodiments for carrying out the invention, and such modifications and changes are within the scope of the present invention. Needless to say, it is included.

2 Optical Device 4 Optical Fiber 6 Optical Waveguide 8 Light Deriving Portion 10 Clad Portion 12 Waveguide Hole 14 Optical Waveguide Member

Claims (5)

A light deriving unit for deriving light from the optical waveguide in a direction intersecting with the axial direction of the optical waveguide for guiding light, the light deriving unit,
A single or a plurality of waveguide holes formed in the cladding portion covering the optical waveguide;
An optical waveguide member installed in the waveguide hole and guiding light from the optical waveguide;
An optical device comprising:
The optical device according to claim 1, wherein light is leaked from the optical waveguide to the optical waveguide member by changing an optical waveguide state of the optical waveguide.
2. The optical device according to claim 1, wherein the light extraction angle of the light guide portion has an inclination angle with respect to an axial direction of the optical waveguide.
An optical waveguide connected to the optical functional device;
An optical device that is installed in the optical waveguide on the front side or the rear side of the optical functional device, and that extracts light guided by the optical waveguide;
The optical device has a single or a plurality of waveguide holes formed in a cladding portion covering the optical waveguide;
An optical waveguide member that is installed in the waveguide hole and guides light from the optical waveguide;
An optical monitor system comprising:
Forming a single or a plurality of waveguide holes in a cladding portion that is installed around an optical waveguide and shields light;
Installing an optical waveguide member in the waveguide hole;
An optical device manufacturing method comprising:

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