JP2006065082A - Optical component and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical component that is easy to manufacture and that has small optical loss and low cost, and also to provide its manufacturing method. <P>SOLUTION: To the connecting end face 13 of an optical fiber arraying member 5 in which a plurality of optical fibers 1a, 1b are arranged in parallel, there is exposed the connecting end face of the optical fibers 1a, 1b. The connecting end face 13 of the optical fiber arraying member 5 is designed to have a first end face 6 which has a first setting angle θ formed with the center axis C in the light passing direction of the optical fiber arraying member 5 and a second end face 7 which is arranged adjacently to the first end face 6 and which has a second setting angle γ formed with the center axis C differently from the first setting angle. To the first end face 6, the connecting end face of the optical fiber 1a is exposed while, to the second end face 7, the connecting end face of the optical fiber 1b is exposed. In the connecting end face of the optical fiber 1a exposed to the first end face 6, there is formed a wavelength selective transmissible filter 31 of a multi-layered film. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an optical component that has a plurality of optical paths such as optical fibers and optical waveguides and is used for optical communication and the like, and a method for manufacturing the same.

  For example, a wavelength multiplexing / demultiplexing module is used for optical communication. The wavelength multiplexing / demultiplexing module has, for example, a multi-core ferrule formed by arranging two (two-core) or more optical fibers side by side and a single-core ferrule having a single-core optical fiber, facing each other with an interval therebetween. A lens having a filtering function such as selectively transmitting or attenuating a specific (set) wavelength light, and a lens such as a gradient index lens aligned with the optical fiber at an interval; (See, for example, Patent Document 1).

  Further, in the wavelength multiplexing / demultiplexing module, instead of disposing the filter between the multi-core ferrule and the single-core ferrule, the middle of some of the optical fibers arranged in parallel with the multi-core ferrule or It has been proposed to provide only at the connection end face.

  In this case, for example, as shown in FIG. 5A, of the two optical fibers 1 (1a, 1b) arranged in parallel to the optical fiber array member 5 of the multi-fiber ferrule 3 and fixed by the adhesive 15 One optical fiber 1a and the optical fiber array member 5 are cut to form a slit 30, and a wavelength selective transmission filter 31 in which a multilayer film is formed on the substrate is embedded in the slit 30, and an adhesive is used. 15a may be filled and fixed. The slit 30 is formed with a width of about 30 μm, for example.

  Moreover, as shown in FIG.5 (b), the wavelength selective transmission filter 31 which covers only the connection end surface side of one optical fiber 1a is arrange | positioned in the connection end surface 13 of the multi-core ferrule 3, and it fixes with the adhesive agent 15a. Sometimes.

  Furthermore, as shown in FIG. 5C, the wavelength selective transmission filter 31 provided on the connection end face 13 of the multi-core ferrule 3 can be formed of a multilayer film directly formed on the connection end face 13 by vapor deposition. In this case, as a first method, only the connection end face side of one optical fiber 1b exposed on the connection end face 13 of the multi-fiber ferrule 3 is covered with a mask such as a metal, and the connection end face of the other optical fiber 1a exposed. There is a method of depositing a multi-layer wavelength selective transmission filter 31 only on the side.

  As a second method, there is the following method. That is, on the connection end face 13 of the multi-fiber ferrule 3, first, a photosensitive resin composition is formed only on the connection end face side of the optical fiber 1b on the side where the wavelength selective transmission filter 31 is not provided, and wavelength selection is performed from this film. A multilayer film (wavelength selective transmissive filter 31) having a property is formed on the entire connection end face 13 of the multi-core ferrule 3 by vapor deposition. Thereafter, a method is also known in which the multilayer film on the connection end face side of the optical fiber 1b is peeled off together with the photosensitive resin material by treating with a stripping solution in which the photosensitive resin material can be dissolved.

JP-A-9-304649

  However, as shown in FIG. 5A, when the slit 30 is formed in the optical fiber 1a, there is a problem that excessive loss occurs at the slit forming portion. In this configuration, it is difficult to insert the thin wavelength selective transmission filter 31 into the slit 30 having a thickness of about 30 μm, which is not suitable for mass production.

  Furthermore, since the wavelength selective transmission filter 31 is fixed by the adhesive 15a in this configuration, the adhesive 15a is present on the optical path, so that the optical loss further increases due to the presence of the adhesive 15a, for example, 500 mW or more. When such high-intensity light is input to the optical fiber 1a, there is a problem that the adhesive 15a deteriorates.

  Further, as shown in FIG. 5B, if the wavelength selective transmission filter 31 is disposed on the connection end face 13 of the multi-fiber ferrule 3, excessive loss due to the formation of the slit 30 is eliminated, but the wavelength of the adhesive 15a is increased. Since the permselective filter 31 is fixed, as in the configuration shown in FIG. 5A, an increase in loss due to the presence of the adhesive 15a on the optical path and a deterioration of the adhesive 15a due to high-intensity light input. There was a problem.

  Furthermore, as shown in FIG. 5C, the method of directly forming the wavelength selective transmission filter 31 only on the connection end face side of one optical fiber 1a is the same as the mask in the first method using a mask. When the end face of the optical fiber on the multilayer film deposition side is close, the film thickness is not uniform in the vicinity of the optical fiber end face, and the multilayer film (wavelength selective transmission filter 31) cannot be formed accurately, so that the yield deteriorates. there were. In addition, the second method using the photosensitive resin composition without using a mask has problems such as many man-hours, expensive equipment required for film formation, and high cost.

  The present invention has been made to solve the above problems, and an object of the present invention is to provide an optical component that is easy to manufacture, has low optical loss, and is low in cost, and a method for manufacturing the same.

  In order to achieve the above object, the present invention has the following configuration as means for solving the problems. In other words, the optical component of the first invention has an optical path array member formed by arranging a plurality of optical paths, and the connection end faces of the plurality of optical paths are exposed on the connection end faces of the optical path array members. The connecting end surface of the optical path array member is adjacent to the first end surface having an angle formed with the central axis in the light passing direction of the optical path array member and the first end surface. And a second end face having a second set angle different from the first set angle, the angle formed with the central axis in the light passing direction of the light path arraying member, and the first end face and the second end face A connection end face of at least one of the plurality of light paths is exposed on the end face, and a multilayer film or a single layer film is formed on the connection end face of the light path exposed on the first end face. It is a means to solve the problem with the configuration.

  In addition to the configuration of the first invention, the optical component of the second invention is such that the first end face and the connection end face of the optical path exposed at the first end face are both polished to form the second end face and the first The connection end faces of the light path exposed at the two end faces are both polished and formed as means for solving the problem.

  Furthermore, the optical component of the third invention is an optical fiber insertion hole through which the optical path is inserted or the light into which the optical fiber is inserted, in addition to the configuration of the first or second invention. An optical fiber array member formed by arranging a plurality of fiber insertion grooves in parallel is used as an optical path array member as means for solving the problem.

  Furthermore, the optical component of the fourth invention is a means for solving the problems by having a configuration in which the optical fiber includes a tech fiber or a gradient index optical fiber in addition to the configuration of the first invention.

  Further, an optical component according to a fifth aspect of the present invention is a means for solving the problems by having a configuration in which the optical path is an optical waveguide and the optical path arraying member is an optical waveguide circuit member in addition to the configuration of the first or second invention. It is said.

  Furthermore, an optical component of a sixth aspect of the invention includes the configuration according to any one of the first to fifth aspects of the invention, wherein the first end surface is a line perpendicular to the central axis of the light passage direction of the light path arrangement member. A structure that is formed obliquely so that the angle is 8 ° or less serves as means for solving the problem.

  Furthermore, an optical component according to a seventh aspect of the present invention has the wavelength selective transmission function of transmitting only light in a set wavelength band in addition to the configuration of any one of the first to sixth aspects of the invention. A configuration that includes any one of a wavelength selective transmission film, a light attenuation film that attenuates light in a set wavelength band, and an antireflection film that prevents reflection of light in a set wavelength band serves as means for solving the problem.

  Further, the optical component manufacturing method according to the eighth aspect of the present invention includes a plurality of optical paths arranged in parallel in the optical path array member, and the connection end face side of the optical path is disposed on the connection end face side of the optical path array member. The first end face is formed by polishing the connecting end face of the optical path arranging member and the connecting end faces of the plurality of optical paths together with an angle formed with the central axis in the light passing direction of the optical path arranging member as a first set angle. Thereafter, a multilayer film is formed on the connection end face of the optical path exposed at the first end face, and then the first end face of the optical path arraying member together with the connection end face of at least one of the plurality of optical paths. The second end face is formed by polishing a part of the second end face to form a second end face having a second set angle different from the first set angle with respect to the central axis in the light passing direction of the light path array member. And the first end face are arranged next to each other, the first end face and the second end face A connection end face of at least one light path different from each other among the plurality of light paths is exposed, and the multilayer film is formed only on a connection end face of the light path exposed on the first end face. As a means to solve the problem.

  According to the optical component of the present invention, the angle between the connection end surface of the light path array member formed by arranging a plurality of light paths in parallel with the central axis in the light passage direction of the light path array member is the first set angle. A first end face and a second end face arranged adjacent to the first end face and having a second set angle different from the first set angle by an angle formed by a central axis in the light passing direction of the light path arranging member. Therefore, a multilayer film or a single layer film can be easily formed only on the first end face.

  Of the connection end faces of the light path array member, the connection end faces of at least one of the plurality of light paths are exposed at the first end face and the second end face, respectively, and exposed at the first end face. By providing a multilayer film or a single layer film on the connection end face of the optical path, only the input / output light to the optical path whose connection end face is exposed at the first end face passes through the multilayer film or the single layer film or the multilayer film or It can be reflected by a single layer film. For example, a wavelength multiplexing / demultiplexing module or the like can be formed by utilizing the filtering function of these films.

  In the optical component of the present invention, the first end face and the connection end face of the optical path exposed at the first end face are both polished and formed, and the second end face and the connection end face of the optical path exposed at the second end face are both polished. According to the formed structure, the first end face and the second end face can be easily formed by polishing, and the connection end face of the optical path exposed on each end face and the corresponding end face can be easily and accurately formed. Can be face-matched. Therefore, for example, the loss with the connection partner connected to the optical component can be reduced.

  Furthermore, in the optical component of the present invention, the optical path is an optical fiber, and an optical fiber array member formed by arranging a plurality of optical fiber insertion holes through which the optical fiber is inserted or optical fiber insertion grooves into which the optical fiber is inserted is used as an optical fiber. According to the configuration of the passage array member, an optical component such as a ferrule having an optical fiber and an optical fiber array member can be used as an optical component having the above-described excellent effects. For example, the optical component of the present invention is used. Thus, it is possible to easily form a wavelength multiplexing / demultiplexing module having excellent wavelength multiplexing / demultiplexing characteristics.

  Furthermore, in the optical component of the present invention, according to the configuration in which the optical fiber includes the tech fiber or the gradient index optical fiber, the tech fiber or the gradient index optical fiber is formed on the connection end face side of the optical fiber. As a result, the light receiving efficiency can be improved, so that the efficiency can be improved when the optical component receives light.

  Furthermore, in the optical component of the present invention, according to the configuration in which the optical path is an optical waveguide and the optical path array member is an optical waveguide circuit member, the optical component having the optical waveguide and the optical waveguide circuit member can be obtained with the above excellent effects. For example, a wavelength multiplexing / demultiplexing module having excellent wavelength multiplexing / demultiplexing characteristics can be easily formed using the optical component of the present invention.

  Furthermore, in the optical component of the present invention, the first end face is formed obliquely so that the angle with the line perpendicular to the central axis of the light passage direction of the light path array member is 8 ° or less. For example, it is possible to suppress the reflected light that has traveled toward the first end face and reflected at the first end face from returning to the optical path again (that is, high reflection attenuation characteristics can be obtained), and the reflected return light It is possible to form an optical component with much lower loss and less adverse effect.

  Furthermore, in the optical component of the present invention, the multilayer film or the single layer film has a wavelength selective transmission film having a wavelength selective transmission function that transmits only light in the set wavelength band, a light attenuation film that attenuates light in the set wavelength band, According to the configuration of any one of the antireflection films for preventing the reflection of light in the set wavelength band, an appropriate optical separation can be performed depending on the wavelength selection characteristics (transmittance, attenuation, and reflectivity) of the multilayer film or the single layer film. An optical component that can perform the wave function can be easily and accurately configured.

  Furthermore, according to the method for manufacturing an optical component of the present invention, a plurality of optical paths are arranged in parallel in the optical path array member, and the connection end face is disposed on the connection end face side of the optical path array member. After polishing the connection end face and the connection end faces of the plurality of optical paths together to form the first end face, a multilayer film or a single layer film is formed on the connection end face of the optical path exposed on the first end face, and then A second end face having a second set angle different from the first set angle by polishing a part of the first end face of the light path array member and forming a central axis in the light passing direction of the light path array member. Therefore, the second end face and the first end face having different angles can be easily arranged adjacent to each other.

  Further, even when the multilayer film or the single-layer film is formed on the connection end face of the optical path exposed at the first end face, for example, the unnecessary part of the film may be removed when forming the second end face. Even if a mask is used, it is difficult to control the film thickness as when only one of the connection end faces of two adjacent optical paths is covered with a mask and a film is formed on the other connection end face. Rather, a multilayer film or a single layer film having a desired film thickness and uniformity can be easily obtained.

  Then, by forming the second end surface, the connection end surfaces of at least one of the plurality of optical paths that are different from each other are exposed and arranged on the first end surface and the second end surface, respectively. By forming the multilayer film or the single layer film only on the connection end face of the exposed optical path, it is possible to easily manufacture the optical component of the present invention capable of exhibiting the excellent effect with a high yield. it can.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the description of the present embodiment, the same reference numerals are assigned to the same names as those in the conventional example, and the duplicate description is omitted or simplified.

  FIG. 1 is a schematic explanatory view showing a first embodiment of an optical component according to the present invention together with its manufacturing process. The optical component of this embodiment is a multi-core (two-core) ferrule 3 having the cross-sectional configuration shown in FIG. 1 (c), and FIG. 1 (e) shows a view seen from the connection end face 13 side. Has been.

  As shown in FIGS. 1C and 1E, the optical component of the present embodiment is an optical component in which a plurality of optical fibers 1 (1a, 1b) as optical paths (two in this case) are arranged in parallel. An optical fiber array member 5 is provided as a passage array member. The optical fiber array member 5 is formed of, for example, a metal or ceramic molded member, but may be formed of a glass capillary formed of glass. In this embodiment, the optical fibers 1a and 1b are both formed of a single mode optical fiber.

  The optical fiber arraying member 5 is provided with a plurality (two in this case) of optical fiber insertion holes 8 through which the optical fibers 1 are inserted, and the two optical fibers 1 (1a) are inserted in these optical fiber insertion holes 8. , 1 b) is inserted and fixed by the adhesive 15. The optical fibers 1a and 1b are respectively inserted into the optical fiber insertion holes 8 in the form of bare optical fibers from which the coating 11 has been removed. The connection end faces of the optical fibers 1a and 1b are connected to the connection end face 13 of the optical fiber array member 5. Is exposed.

  The connection end face 13 of the optical fiber array member 5 is formed by arranging the first end face 6 and the second end face 7 next to each other. The first end face 6 is formed at an angle formed with the central axis (C in FIG. 1C) in the light passing direction of the optical fiber array member 5 at a first set angle (here, θ), and the second end face 7 is formed at a second set angle (here, γ) in which the angle formed with the central axis of the optical fiber array member 5 in the light passing direction is different from the first set angle.

  In FIG. 1C, A indicates a line parallel to the first end face 6, B indicates a line parallel to the second end face 7, the angle θ is formed at 82 °, and the angle γ Is formed at −82 °. That is, the angle between the line R orthogonal to the central axis C in the light passing direction of the optical fiber array member 5 and the first end face 6 is formed at 8 °, and the angle between the line R and the second end face 7 is also 8 °. Is formed.

  Each of the first end face 6 and the second end face 7 has at least one (here, one) optical fiber 1a, a plurality of (here, two) different optical fibers 1a, 1b. The connection end surface 1b is exposed. That is, the connection end face of the optical fiber 1 a is exposed at the first end face 6, and the connection end face of the optical fiber 1 b is exposed at the second end face 7.

  The first end face 6 and the connection end face of the optical fiber 1a exposed on the first end face 6 are both polished and formed, and the second end face 7 and the connection end face of the optical fiber 1b exposed on the second end face 7 are both Polished and formed. A multi-layer wavelength selective transmission filter 31 is formed on the connection end face of the optical fiber 1 a exposed at the first end face 6.

The wavelength selective transmission filter 31 is a multilayer film in which SiO ₂ , TiO ₂ , and Ta ₂ O ₃ are laminated, and wavelength selection that transmits only light in a set wavelength band, here, light having a wavelength of 1.53 μm or less. It is formed of a wavelength selective transmission film (low-pass filter film) having a transmission function. This wavelength selective transmission film is formed on the connection end face 13 of the optical fiber array member 5 by film formation.

  The present embodiment is configured as described above. Next, a method for manufacturing an optical component according to the present embodiment will be described. First, as shown in FIG. 1A, two optical fibers 1a and 1b are arranged side by side on the optical fiber array member 5, and the connection end face side of the optical fibers 1a and 1b is connected to the connection end face 13 of the optical fiber array member 5. Place on the side. Then, the connection end face 13 of the optical fiber array member 5 and the connection end faces of the optical fibers 1a and 1b are both polished so that the angle formed with the central axis C in the light passing direction of the optical fiber array member 5 is a first set angle ( Here, the first end face 6 is formed as θ).

  Thereafter, as shown in FIGS. 1B and 1D, a multilayer film is deposited on the connection end faces of the optical fibers 1a and 1b exposed on the first end face 6 by a vacuum deposition apparatus such as an ion assist method. A film is formed to form the wavelength selective transmission filter 31.

  FIG. 1 (d) shows an example in which the wavelength selective transmission filter 31 (multilayer film) is formed in the central region of the first end face 6 including the optical fibers 1a and 1b. Since it may be formed in a region including the connection end face of the optical fiber 1a, it may be formed on the entire first end face 6, or may be formed on and around the connection end face of the optical fiber 1a.

  In other words, the formation region of the multilayer film only needs to be formed easily and efficiently. For example, as in the conventional example described with reference to FIG. No effort or technique is required as in the case of accurately determining and controlling the formation region of the multilayer film so that the multilayer film is not formed on the connection end face of the fiber 1b, and the film can be formed easily.

  Next, as shown in FIG. 1 (c), the connection of the optical fiber arraying member 5 together with the connection end face of at least one of the plurality of optical fibers, here, one of the optical fibers 1a and 1b. A second set angle (here, an angle formed by polishing a part of the first end face 6 of the end face 13 and the central axis C in the light passing direction of the optical fiber array member 5 is different from the first set angle (θ)). By forming the second end face 7 to be γ), the second end face 7 and the first end face 6 are arranged adjacent to each other.

  Then, the first end face 6 and the second end face 7 are each provided with an exposed connection end face of at least one optical fiber 1 out of the two optical fibers 1a and 1b. That is, the connection end face of the optical fiber 1 a is exposed at the first end face 6, and the connection end face of the optical fiber 1 b is exposed at the second end face 7. Also, as shown in FIGS. 1C and 1E, a multilayer wavelength selective transmission filter 31 is formed only on the connection end face of the optical fiber 1a that is exposed on the first end face 6. .

  The present embodiment is manufactured as described above. By applying this manufacturing method, the angle formed between the connection end surface 13 of the optical fiber array member 5 and the central axis C in the light passing direction of the optical fiber array member 5 is as follows. By adopting a configuration in which the first end surface 6 having the first set angle θ and the second end surface 7 having the second set angle γ as the angle formed by the central axis C are arranged adjacent to each other, the first end surface 6 and the second end surface 6 are arranged. The connection end surfaces of the corresponding optical fibers 1a and 1b can be exposed and arranged on the end surface 7, respectively, and only easily and accurately only on the connection end surface of the optical fiber 1a exposed on the first end surface 6. The multilayer wavelength selective transmission filter 31 can be formed.

  Then, by providing the wavelength selective transmission filter 31 on the connection end face of the optical fiber 1b exposed on the first end face 6, only the input / output light to the optical fiber 1a can be passed through the wavelength selective transmission filter 31. A wavelength multiplexing / demultiplexing module or the like can be formed by utilizing the filtering function of the wavelength selective transmission filter 31.

  In addition, according to the present embodiment, the first end face 6 and the connection end face of the optical fiber 1a exposed on the first end face 6 are both polished and formed, and the second end face 7 and the optical fiber exposed on the second end face 7 are polished. Since both the connection end faces 1b are formed by polishing, the first end face 6 and the second end face 7 can be easily formed by polishing, and correspond to the connection end faces of the optical fibers 1a and 1b exposed at the end faces 6 and 7, respectively. It is possible to easily and accurately match the end faces 6 and 7 to be matched. Accordingly, it is possible to reduce the loss with the connection partner connected to the optical component of the present embodiment.

  Furthermore, according to this embodiment, the first set angle θ is 82 ° and the second set angle γ is −82 ° (in other words, the first end face 6 and the second end face 7 are both The angle formed by the line R perpendicular to the central axis in the light passing direction of the optical fiber arraying member 5 is 8 °), so that the optical fiber 1a proceeds toward the first end face 6 and is reflected at the first end face 6, for example. The reflected light can be prevented from returning to the optical path again (that is, a high reflection attenuation characteristic can be obtained), and an optical component with much lower loss can be formed with less adverse effects due to the reflected return light.

  FIG. 2 shows an example of an optical wavelength multiplexing / demultiplexing module formed by applying the optical component of the present embodiment together with an operation example thereof. This optical wavelength multiplexing / demultiplexing module forms a two-core collimator 20 by inserting and fixing a multi-core (two-core) ferrule 3 and a lens 2a, which are optical components of this embodiment, into a housing 26. And a single-core collimator 21 are optically coupled.

  The lens 2a of the multi-core collimator 20 has a connection end surface 33 facing the ferrule 3 disposed in contact with a ridge line between the first end surface 6 and the second end surface 7 of the ferrule 3, and the single-core ferrule 21 of the lens 2a. A quartz substrate 22 is provided on the side of the connection end face 34 facing the surface of the substrate via a spacer 25. The quartz substrate 22 is formed with a high-pass filter 23 on one surface (lens 2a side) that allows light having a wavelength exceeding 1.53 μm to pass therethrough, and the other surface has a wavelength of 1.55 μm. An antireflection film 24 for preventing the reflected light from being reflected is formed.

The single-core collimator 21 is formed by inserting and fixing a single-fiber ferrule 4 in which an optical fiber 1 (1c) formed by a single-mode optical fiber is arrayed and a lens 2b into a housing 27. The connection end face 14 of the lens 4 and the connection end face 35 of the lens 2b facing the connection end face 14 are both polished and formed obliquely.

  In this wavelength multiplexing / demultiplexing module, as shown in FIG. 2A, for example, when light having a wavelength λ1 (1.26 μm to 1.36 μm) is incident from the first port 16, this light is transmitted through the optical fiber 1a. Propagated and emitted from the connection end face, passed through the lens 2a, reflected by the high pass filter 23, passed through the lens 2a again, proceeded to the second end face 7 side of the multi-core ferrule 3, and entered the optical fiber 1b. The light is emitted from the 2 port 17.

  As shown in FIG. 2B, for example, when light having a wavelength λ2 (1.48 μm to 1.50 μm) is incident from the second port 17, the light propagates through the optical fiber 1b and the connection end face thereof. , Passes through the lens 2a, is reflected by the high pass filter 23, passes through the lens 2a again, proceeds to the first end face 6 side of the multi-core ferrule 3, passes through the wavelength selective transmission filter 31, and enters the optical fiber 1a. Incident light is emitted from the first port 16.

  Further, as shown in FIG. 2 (c), for example, when light having a wavelength λ3 (1.55 μm to 1.56 μm) is incident from the second port 17, the light propagates through the optical fiber 1b and the connection end face thereof. , Passes through the lens 2a, sequentially passes through the high-pass filter 23 and the antireflection film 24, enters the optical fiber 1c of the single-core ferrule 4 through the lens 2b, and exits from the third port 18.

  The insertion loss of each of the wavelengths λ1, λ2, and λ3 is 0.8 dB or less, and the isolation of λ2 in the route from the second port 17 to the third port 18 is 50 dB or more.

  In addition, the isolation of λ3 in the path from the second port 17 to the first port 16 was 40 dB or more. This value is about 25 dB when the conventional multi-core ferrule 3 as shown in FIG. 5 is used without using the optical component (multi-fiber ferrule 3) of this embodiment. Compared to this, it was a very good value, and by applying this embodiment example, it was possible to significantly improve the isolation.

  Next, a second embodiment of the optical component according to the present invention will be described with reference to FIG. In the description of the second embodiment, the same reference numerals are assigned to the same name portions as those in the first embodiment, and the duplicate description is omitted or simplified.

  The second embodiment is configured in substantially the same manner as the first embodiment, and the second embodiment is different from the first embodiment as shown in FIG. The optical fiber arraying member 5 is a glass substrate 12 having a plurality of (two in this case) V-grooves 9 as optical fiber insertion grooves into which the optical fibers 1a and 1b are inserted, and the optical fibers 1a and 1b. 1b has the gradient index optical fiber 10 on the connection end face side.

  The gradient index optical fiber 10 has a lens effect and is integrally formed at the tip of a single mode fiber. The base end side of the single mode optical fiber is fixed to the glass substrate 12 with an adhesive 15. On the connection end face side of the glass substrate 12 and the optical fibers 1a and 1b, a glass plate 28 for holding the optical fibers 1a and 1b is provided, and the glass plate 28 is integrally fixed to the glass substrate 12, The end face is also formed in the same manner as the glass substrate 12.

  As shown in FIG. 3A, the optical component according to the second embodiment is manufactured by fixing the optical fibers 1 (1a, 1b) to the optical fiber arraying member 5 of the glass substrate 12 to obtain the optical fibers 1a, 1b. After the connection end face side is arranged on the connection end face 13 side of the optical fiber arraying member 5 and covered with the glass plate 28, the center axis C of the optical fiber arraying member 5 in the light passing direction is similar to the first embodiment. The first end surface 6 having the first set angle θ is polished and formed. Thereafter, as shown in FIGS. 1B and 1D, a multilayer film is deposited on the connection end faces of the optical fibers 1a and 1b exposed on the first end face 6 by a vacuum deposition apparatus such as an ion assist method. A film is formed to form the wavelength selective transmission filter 31.

  Thereafter, as shown in FIG. 3C, a part of the first end surface 6 of the optical fiber arraying member 5 is polished together with the connection end surface of the optical fiber 1b, so that the optical fiber arraying member 5 has a central axis C in the light passing direction. By forming the second end face 7 having an angle formed by the second set angle γ, the second end face 7 and the first end face 6 are disposed adjacent to each other, and the connection end face of the optical fiber 1b is disposed on the second end face 2. The multi-layered wavelength selective transmission filter 31 is formed only on the connection end face of the optical fiber 1 a that is exposed on the first end face 6.

  The second embodiment can also achieve the same effects as the first embodiment. In the second embodiment, since the gradient index optical fiber 10 formed on the connection end face side of the optical fibers 1a and 1b has a lens effect, for example, when a wavelength multiplexing / demultiplexing module is formed. The module can be formed without providing the lens 2a as shown in FIG. 2, the number of parts for forming the module can be reduced, and the cost and the loss can be further reduced. .

  In addition, this invention is not limited to the said Example, Various forms can be taken. For example, in the second embodiment, the refractive index distribution type optical fiber 10 is provided on the connection end face side of the optical fibers 1 a and 1 b, but a tech fiber may be used in place of the refractive index distribution type optical fiber 10.

  In each of the above embodiments, the optical path is the optical fiber 1, but in the optical component of the present invention, the optical path may be an optical waveguide, and the optical path array member may be an optical waveguide circuit member. Also in this case, the same effects as those of the above embodiments can be obtained.

  Further, in each of the above embodiments, the multilayer film is formed by vapor deposition on the first end face 6 of the optical fiber array member 5, but the multilayer film may be formed by sputtering.

  Further, in each of the above embodiments, the multilayer film is formed on the first end face 6 of the optical fiber array member 5, but a single layer film may be formed instead of the multilayer film. In addition, when an optical component having an optical waveguide circuit member is formed instead of the optical fiber array member 5, a multilayer film or a single layer film may be formed on the first end face 6. .

  Further, in each of the above embodiments, the optical component is formed by arranging the two optical fibers 1, but the optical component is formed by arranging optical paths such as three or more optical fibers and optical waveguides in parallel. Also good. In this case, for example, as shown in FIG. 4A, one optical path (here, optical fiber 1) is exposed on the first end face 6, and the other optical path (here, optical fiber 1) is second. As shown in FIG. 4B, a plurality of optical paths (here, the optical fiber 1) may be exposed on the first end face 6, and one or more optical paths (here) may be provided. Then, a plurality of optical fibers 1) may be disposed on the second end face 7 so as to be exposed.

  As shown in FIGS. 4C and 4D, the connection end face 13 of the optical fiber arraying member 5 is in addition to the first end face 6 and the second end face 7 that are arranged adjacent to each other (the third end face). It is good also as a structure which has several surfaces 40), such as an end surface and a 4th end surface. As described above, even when the connection end face 13 of the optical fiber arraying member 5 has a plurality of faces, it is sufficient that a multilayer film or a single layer film is formed on at least the first end face 6, and other than the second end face. A film may also be formed on the surface (see reference numeral 41 in FIG. 4D).

  Further, in each of the above embodiments, the wavelength selective transmission filter 31 that transmits light in the set wavelength band is formed by the multilayer film. However, the multilayer film or the single layer film attenuates light in the set wavelength band. A film may be used, an antireflection film for preventing reflection of light in a set wavelength band, or a film having other functions.

  Further, in the above embodiment, the first set angle is formed at 82 ° and the second set angle is formed at −82 °. However, these angles are not particularly limited and can be set as appropriate. is there. The angle between the connection end surface of the optical path array member such as the optical fiber array member 5 such as the first end surface 6 and the second end surface 7 and a line orthogonal to the central axis of the light passage direction of the optical path array member is 8 It is preferable to form it obliquely so as to be less than or equal to 0 °, because a high reflection attenuation characteristic can be obtained at the end face, and an optical component with much lower loss can be formed with less adverse effects due to reflected return light.

It is explanatory drawing which shows the manufacturing method and structure of 1st Embodiment of the optical component which concerns on this invention. It is explanatory drawing which shows the example of the wavelength optical multiplexing / demultiplexing module formed by applying the optical component of the said 1st Embodiment. It is explanatory drawing which shows the manufacturing method and structure of 2nd Embodiment of the optical component which concerns on this invention. It is principal part explanatory drawing which shows the structure by the side of the connection end surface in the other embodiment of the optical component which concerns on this invention. It is explanatory drawing which shows the structural example of the conventional multi-core ferrule.

Explanation of symbols

1, 1a, 1b Optical fiber 3 Multi-fiber ferrule 4 Single-core ferrule 5 Optical fiber array member 6 First end surface 7 Second end surface 8 Optical fiber insertion hole 9 V groove 10 Refractive index distribution type optical fiber 13, 14 Connection end surface 31 Wavelength Selective permeability filter

Claims (8)

  An optical component having an optical path array member formed by arranging a plurality of optical paths in parallel, wherein the connection end faces of the plurality of optical paths are exposed on the connection end faces of the optical path array members, The connecting end surface of the member is disposed adjacent to the first end surface having a first set angle with respect to the central axis in the light passing direction of the light path arraying member and the first end surface. A second end face having a second set angle different from the first set angle in an angle formed with a central axis in a passing direction, and the first end face and the second end face are each of the plurality of light paths. An optical component, wherein a connection end face of at least one optical path different from each other is exposed, and a multilayer film or a single layer film is formed on the connection end face of the optical path exposed on the first end face.   The first end face and the connection end face of the light path exposed at the first end face are both polished and formed, and the second end face and the connection end face of the light path exposed at the second end face are both polished and formed. The optical component according to claim 1.   The optical path is an optical fiber, and an optical fiber array member formed by arranging a plurality of optical fiber insertion holes through which the optical fiber is inserted or an optical fiber insertion groove into which the optical fiber is inserted is used as an optical path array member. The optical component according to claim 1 or 2.   4. The optical component according to claim 3, wherein the optical fiber includes a tech fiber or a gradient index optical fiber.   3. The optical component according to claim 1, wherein the optical path is an optical waveguide, and the optical path array member is an optical waveguide circuit member.   The first end face is formed obliquely so that an angle with a line perpendicular to the central axis of the light passage arrangement member in the light passage direction is 8 ° or less. The optical component as described in one.   The multilayer film or single layer film is a wavelength selective transmission film having a wavelength selective transmission function that transmits only light in the set wavelength band, an optical attenuation film that attenuates light in the set wavelength band, and prevents reflection of light in the set wavelength band. 7. The optical component according to claim 1, wherein the optical component is any one of antireflection films.   A plurality of light paths are arranged in parallel on the light path array member, and a connection end surface side of the light path is disposed on a connection end surface side of the light path array member, and the connection end surface of the light path array member and the plurality of light paths After forming the first end surface by polishing together the connection end surface and setting the angle formed with the central axis of the light passage direction of the light path arrangement member as the first set angle, the connection end surface of the light path exposed at the first end surface Forming a multi-layer film or a single layer film, and then polishing a part of the connection end face of the light path arrangement member together with the connection end face of at least one of the plurality of light paths. The second end face and the first end face are disposed adjacent to each other by forming a second end face having a second set angle that is different from the first set angle with respect to the central axis of the light passing direction of the member. , The plurality of light paths on the first end surface and the second end surface, respectively. A connecting end face of at least one optical path different from each other is exposed, and the multilayer film or the single layer film is formed only on the connecting end face of the optical path exposed at the first end face. Manufacturing method for optical components.

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