DE69734281T2 - Module for optical communications - Google Patents

Module for optical communications

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Publication number
DE69734281T2
DE69734281T2 DE69734281T DE69734281T DE69734281T2 DE 69734281 T2 DE69734281 T2 DE 69734281T2 DE 69734281 T DE69734281 T DE 69734281T DE 69734281 T DE69734281 T DE 69734281T DE 69734281 T2 DE69734281 T2 DE 69734281T2
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DE
Germany
Prior art keywords
light
optical
module
chamber
reflected
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
DE69734281T
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German (de)
Other versions
DE69734281D1 (en
Inventor
Shigemasa 2800 Enoeda
Noritane Tuzuki-ku Kimoto
Masahiro 2800 Miyasaka
Toshimichi 2800 Yasuda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kyocera Corp
Original Assignee
Kyocera Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kyocera Corp filed Critical Kyocera Corp
Priority to EP19970112282 priority Critical patent/EP0892293B1/en
Publication of DE69734281D1 publication Critical patent/DE69734281D1/en
Application granted granted Critical
Publication of DE69734281T2 publication Critical patent/DE69734281T2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Description

  • TITLE OF INVENTION
  • Module for optical communication
  • Background of the invention
  • The The present invention relates to a module for optical Communication, in which optical elements for transmission and reception be used in both directions of communication, or on a Module for optical communication with optical receiving elements for a Monitor insert is provided.
  • The module for use in both directions of communication according to 5 is in the body 7 arranged so that the optical element 1 for transmission and the optical element 2 can be orthogonal to each other in the optical axis to receive. A beam splitter plate 3 as the optical signal allocation body in the intersecting portion of the mutual optical axes is included at 45 degrees with respect to the respective optical axes. A sleeve 6 into which an optical fiber 5 is received in the optical axis direction of the optical element 1 arranged for transmission.
  • That of the optical element 1 Transmission light output for transmission 20 happens a lens 4 and is partially from the beam splitter plate 3 reflected to transfer its remaining part. The transmitted transmission light 20 is from the optical fiber 5 escorted out. That of the optical fiber 5 initiated received light 21 is partially through the beam splitter plate 3 transferred and its remaining part is reflected. The reflected light received 21 meets the optical element 2 to receive, making it possible to maintain a communication in both directions.
  • The beam splitter plate 3 a glass plate partially reflects the light signal and has to perform a distribution process by transferring the remaining part. As the distribution body of the light signals, a prism beam splitter or a hologram is used.
  • The module for the two directions of communication according to 5 however, has a problem in that the beam splitter 3 reflected component of the optical element 1 transmitted light for transmission 20 furthermore, stray light 22 which, via the beam splitter by reflection through the inner wall surface 7c of the body 7 is transmitted, wherein the scattered light on the optical element 2 to the reception impinges, whereby the Nebensprecherscheinung worsens. The application of a light-absorbing cavity is disclosed in documents EP 0250331, EP 0197842 and EP 0197841.
  • Accordingly, a Object of the invention, one of the reflection of the transmission light in the module for the optical communication in both directions causes stray light to prevent the Nebensprecheigenschaften to improve.
  • The Invention is in the claims 1 and 2 defined.
  • The Light non-return chamber The invention is a section with a function that is a reflection prevents the incident light in the opposite direction.
  • According to the invention is the Nebensprecheigenschaft improved as that of the optical element for the transmission emitted and reflected by the assignment body reflection light absorbed is through the light non-returning chamber is diffused and also reflected in scattered light, which an impact on the optical element for reception is prevented.
  • According to the invention will also be in the module for optical communication except for the Use in both directions the light returned from the Lichtausleitseite prevented from reaching the optical receiving element by the reflection on the allocation body impinge.
  • The The invention relates to a module for optical communication or like.
  • This in 9 shown module for optical communication has a Lichteinleitmittel 101 that made one with an optical fiber 101 provided sleeve 101b exists, a Lichtausleitmittel 105 that made one with an optical fiber 105a provided sleeve 105b consists, and arranged therebetween optical parts 104 that are linear within a pipe 108 are arranged, wherein the tube 108 in a through hole 106a of the body 106 is provided.
  • The optical parts 104 For example, an insulator, a WDM filter, a beam splitter, a lens, etc., include one of the light introducing means 101 initiated light signal 131 happens the optical parts 104 , and then the signal from the Lichtausleitmittel 105 escorted out.
  • The respective sleeves 101b . 105b as well as optical parts 104 are with a pipe 108 by YAG welding or the like by preceding position alignment thereof within the tube 108 spliced. Then the module becomes opti communication through the splicing process of the entire tube 108 with the body 106 built up. To the pipe 108 with the body 106 To splice, a weld hole (not shown) for communicating with the environment in the inner wall of the through hole 106a to perform the YAG welding operation through the weld hole. The module for optical communication according to 10 is with a collimator lens 113a and 117a for converting the optical signal 131 in collimated light (parallel light). The light introduction means 111 that made the with an optical fiber 111 provided sleeve is formed with the sleeve-holding member 112 splices, and the lens support member 113 for holding the collimator lens 113a becomes in position alignment with the sleeve-holding member in advance 112 spliced on the Lichteinleitseite the module for optical communication to a sub-assembly 119a to build. A light diffuser 115 that made the with an optical fiber 115a provided sleeve 115b is, is with the sleeve-holding member 118 splices, and a lens holding member 117 for holding the collimator lens 117a is preceded by the positioning alignment with the lens holding member 118 spliced on the Lichtausleitseite, so that a sub-unit 119b arises.
  • A splicing operation is performed with YAG welding while the subassembly units 119a and 119b each in position alignment in the XY direction, with both ends of the optical parts 114 inside his body 116 in position alignment. The positional alignment in a Z-axial direction is performed when the sleeves 111b respectively. 115b each with the sleeve support member 112 and 118 are spliced.
  • A module for optical communications, as in 9 is shown, however, has a third problem in that the size can not be reduced. The number of parts is higher because of the tube 108 necessary is. The pipe 108 must be with the body 106 be spliced after the relevant elements with the pipe 108 have been spliced, thereby complicating the manufacturing step.
  • It is difficult to see the inner optical parts 104 in the through hole 106a of the body 106 to splice with YAG weld, even if each element is directly connected to the body 106 without the tube 108 should be spliced.
  • The optical communication module of such a construction according to 10 has a fourth problem, namely that the loss of the optical signal due to the lower degree of parallelism of the splicing surface between the substructure units 119a . 119b on both sides gets bigger and the body 116 arranges the optical axis on the inlet side and the discharge side of the site. If not the respective substructure units 119a and 119b with the body 116 splice, the improper angle of the optical axis can not be adjusted, although the positional alignment can be made in the XY direction.
  • These optical communication modules have a fifth problem in that the large axial displacement L is finally caused when these axial displacements occur because the axial displacements L 1 , L 2 and L 3 of the incident light and the output light of the light signals 131 each in each of the optical parts 121 . 122 and 123 according to 11 take place though several optical parts in the bodies 106 and 116 are provided.
  • When the large axial displacement L is caused, it becomes difficult to perform the adjustment in a mounting operation or the effective diameter of the optical parts 123 at which the optical signal 131 which is rearward, is displaced and thus undesirably causes the loss. The third, fourth and fifth problems are solved by modules that are not covered by the claims.
  • Accordingly is in an optical communication module in which a Lichteinleitmittel and a light discharge means at both end portions of the through hole are provided and these with in the body formed through hole provided parts are arranged, this on a body in attached to a state in which the respective optical axes the Lichteinleitmittels, the optical parts and the Lichtausleitmittel aligned with the center axis of the through hole.
  • at a module for optical communication, in which a Lichteinleitmittel and a light extraction means at both ends with optical parts spliced be in the body are provided, the positional alignment between the light introducing means, the diverting agent and the body performed with a lens holding member, each between the Lichteinleit- / Ausleitmittel and the body is inserted.
  • In addition, in an optical communication module in which the light introducing means and the light extraction means are spliced at both ends with a plurality of optical parts provided in the body interior portion, the axial displacements between the incident light and the emitted light are arranged in the plural optical parts, that they are in one direction follow, in which they correct each other.
  • The third problem can be solved because each element is spliced directly to the body. The manufacturing step can be simplified and the number of parts can be reduced. The optical parts of the body interior portion can be simple be spliced from another mounting hole, which is the through hole crosses.
  • The fourth problem can be solved since an adjustment or adaptation can take place if there is a shift in the angle of the optical axis. A position for adjustment in the XY direction can be in two places between the body and the Lichteinleit- and -ausleitmittel are formed.
  • The fifth Problem can be solved since the total axial displacement amount can be reduced by mutual axial displacements corrected in an arrangement direction of the plurality of optical parts become.
  • Brief description of the drawings
  • It demonstrate:
  • 1 a longitudinal sectional view showing an optical communication module according to the invention,
  • 2 an enlarged view illustrating the environment of a light non-recirculating chamber of the module for optical communication of 1 .
  • 3 a longitudinal sectional view to illustrate a further embodiment of the invention,
  • 4 (A) (C) shows various embodiments of the light non-recirculating chamber in the optical communication module of the invention,
  • 5 a longitudinal sectional view illustrating the conventional optical communication module,
  • 6 3 is a longitudinal sectional view showing an optical communication module not covered by the claims;
  • 7 (A) an exploded sectional view showing an unobscured from the claims optical communication module, and
  • 7 (B) a sectional view of the assembled module,
  • 8th 3 is a perspective view showing the arrangement of the optical parts of an optical communication module not covered by the claims.
  • 9 a longitudinal sectional view of the conventional optical communication module,
  • 10 an exploded sectional view showing the conventional optical communication module, and
  • 11 a schematic view showing the arrangement of the optical parts of the conventional optical communication module.
  • Preferred embodiments
  • It Turning now to the drawings, preferred below embodiments of the invention will be described.
  • 1 Fig. 11 is a sectional view showing the optical communication module of the invention. An optical transmission element 1 , such as a laser diode or the like and an optical receiving element 2 such as a photodiode or the like are in a metal body 7 arranged such that the mutual optical axis is orthogonal to each other, wherein a beam splitter plate 3 which is inclined by 45 ° with respect to the mutual optical axis, is provided as an assignment body of the light signals in the respective orthogonal optical axis portion. A sleeve 6 is arranged so that the optical fiber 5 in the optical axis direction of the optical transmission element 1 is held.
  • The transmission light output from the optical transmission element 20 happens the lens 4 and is partially from the beam splitter plate 3 reflected, and the remaining part is transmitted. The transmitted transmission light 20 is from the optical fiber 5 escorted out. That of the optical fiber 5 initiated reception light 21 is partially from the beam splitter plate 3 and its remaining part is reflected. The reflected reception light 21 meets the optical receiving element 2 with which it is possible to let the communication take place in both directions.
  • A (light) non-return chamber 8th is in the body 7 formed at a position at which the reflection light 23 impinges, that of the optical transmission element 1 output transmission light 20 from the beam splitter plate 3 is reflected.
  • As in an enlarged view in 2 is shown, the light is non-returnable chamber 8th from one in the body 7 trained concave section 7a and a cover member 9 to cover it around the room except for a pinhole 7b that is in the inner wall of the body 7 opens, to close. The reflection light 23 Penetrates the light non-returning chamber 8th over the needle hole 7b and is diffused and absorbed, leaving it in the light non-recirculating chamber 8th is reflected repeatedly. Therefore, the reflection light becomes 23 prevented from being on the side of the optical receiving element 2 to apply, thus improving the cross-talk effect.
  • The reflection light 23 also becomes focusing light because the transmission light 20 this is conically tapered reflection light. The needle hole 7b is formed at a position where the focus light 23 is focused, and the needle hole 7b can be configured in a minimum size, which prevents reflection light 23 from the light non-returning chamber 8th escapes. To the escape of reflection light 23 to prevent, has the pinhole 7b preferably a diameter of 0.5 mm or less.
  • The cover element 9 is formed for covering the light non-return chamber with a light-absorbing member, wherein an absorption effect for the reflection light 23 can be improved. The light absorbing material is made of various materials such as resin, metal, ceramics or the like. The side on which at least the reflection light 23 impinges, preferably has a black color. For example, a black coating layer provided on the surface of the resin or a metal material of a completely black color is used. In detail, various experiments carried out show that the black resin of these materials has a better absorption effect of the reflection light 23 Has. Specifically, black polycarbonate or ABS resin is preferable. In addition, various resins such as polyethylene, tetrafluoroethylene, polypropylene or the like can be used.
  • The beam splitter plate 3 is a glass plate which partially reflects the light signal and transmits the remaining part thereof, so that an assignment process takes place. Although a prism splitter or a hologram is additionally used as the optical signal's allocation body, only a light non-returning chamber needs to be used 8th on the inner wall of the body 7 be provided, at which the reflection light impinges, since the reflection light 23 of the transmission light 20 anyway exists.
  • In The above example has been the optical communication module described in both directions. The other embodiments The invention will be described below.
  • An in 3 The light communication module shown is used in the light amplifier or the like. A sleeve made with an optical fiber 11 which is a light introducing means, and the optical receiving element 12 are in the body 17 provided so that the mutual optical axes may be orthogonal to each other. A beam splitter plate 13 for forming the allocation body is provided in a portion in which these optical axes are included. Pods, each of which is different types of devices 14 and an optical fiber 15 , which is a Lichtausleitmittel, are respectively on the optical axis of the sleeve 11 arranged.
  • The transmission light 20 that from the side of the optical fiber 11 is to be transmitted on the input side is partially through the beam splitter plate 13 reflected and the reflection light 24 is from the optical receiving element 12 recorded so that it monitors whether the transmission light 20 happened or not. That through the beam splitter plate 13 transmitted transmission light 20 happens the different devices 14 and will be out of the optical fiber 15 directed to the discharge side. The device 14 For example, an isolator, a WDM filter to allow only the light of a partial wavelength to pass, a lens, or the like, each having a given function.
  • In the optical communication module of 3 can do different machining operations through the device 14 be performed while the transmission light 20 is monitored. The optical communication module transmits the transmission light 20 in a one-way direction. The transmission light 20 that the beam splitter plate 13 has passed through the end face of the device 14 reflected, or is through a front of the optical fiber 15 reflected on the discharge side element, so that the return light 25 arises. In the invention is a light non-return chamber 18 similar to that of the aforementioned embodiment in a body 17 provided at a position where the reflection light 23 impinges, wherein the return light 25 from the beam splitter plate 13 , which is the assignment body, is reflected so that the reflection light 23 is absorbed and diffused.
  • The light non-returning chamber 18 consists of one in the body 17 trained concave section 17a and a cover member 19 to cover it, the space except a pinhole 7b that attach to the inner wall of the body 17 opens, is closed. The chamber that does not return to the light 18 penetrated reflection light 23 is diffused and absorbed. Therefore, the reflected light is prevented 23 on the optical receiving element 12 incident.
  • With regard to the above example, one is except for a pinhole 17b closed space as the optical light not to be returned chamber 18 shown. Using a material having a longer optical absorption property than a cover member 19 , such as in 4 (A) is shown, the reflection light 23 be absorbed. The reflection light 23 is caused not to the side of the optical receiving element 12 return, with the end face of the cover 19 is intended as an inclined surface, such as 4 (B) shows. Or the reflection light 18 can over the end face of the cover 19 be diffused as a rough surface.
  • In this way the light has non-returning chamber 18 only a function of preventing the light from being reflected in a direction opposite to the direction of impact by absorbing, diffusing the incident reflection light 23 or by reflection of the light in a different direction.
  • As an embodiment of the invention, an in 1 shown optical communication module has been produced. The concave section 7a of the body 7 is with a cover 9 Cover made of polycarbonate or ABS resin, around the light non-return chamber 18 to build. As a comparative example is an optical communication module with a metal body 7 prepared that in 5 is shown.
  • The Measurement of the side-speaker characteristic, if the communication in both Directions by means of the optical communication of a wavelength of 1.31 microns over the respective optical communication modules is, confirms that the sub talk property has been improved by 15 dB or more, where they are 25 to 30 dB in the embodiment the invention was while it is about 10 to 15 DB in the comparative example.
  • According to the invention, in an optical communication application module in which an assignment body for assigning the light signal to each optical element is provided between the optical transmission element and the optical reception element, and the optical fiber for guiding and introducing the light signals to the intersecting optical elements is the reflection light 23 prevented from further reflection and dissipation by providing the light non-recirculating chamber 18 in a body at a position where the light is emitted from the transmitting optical transmission element and the reflection light from the assignment body is incident.
  • According to the invention, in an optical communication module in which a light introduction means and a light extraction means are provided, an allocation body of light signals is provided therebetween, and an optical reception element for detecting the light signal assigned from the assignment body is disposed, whereby the reflection light is prevented therefrom; to be further reflected and scattered by providing a light non-recirculating chamber 18 in a body portion at a position where reflection light does not impinge where the returned light passes through the assignment body, and the return body passing the assignment body is reflected by the assigning body, which is reflected by another element.
  • Consequently can the invention provide an optical communication module, which has better side-speaker characteristics and better performance shows what prevents stray light on the side of the optical Receiving elements impinges.
  • One from the claims uncovered module will be described below.
  • 6 Fig. 10 is a sectional view showing the optical communication module to be used for a light amplifier or the like. A through hole 106a and a mounting hole 10b This crosses vertically are in the metal body 106 made of stainless steel or the like. These elements are on the body 106 fixed in a straight line in a state in which the respective optical axis on the central axis of the through hole 106a is aligned, with a Lichteinleitmittel 101 that's from the optical fiber 101 and the sleeve 101b with one end of the through hole 106 is spliced and the optical parts 104 in the inner portion of the through hole 106a are spliced, composed, as well as with a Lichtausleitmittel, which consists of the optical fiber 105a and the sleeve spliced to the other end portion 105b consists. The optical parts 104 which the optical signal 131 can transmit and perform a certain function, for example, a type of insulator, a WDM filter, a beam splitter, a lens or the like.
  • An optical receiving element 102 is with the end portion of the mounting hole 106b spliced. A beam splitter plate 103 , which is 45 ° with respect to the central axis of both the through hole 106a as well as the mounting hole 106b is inclined, is in the crossing portion between the through hole 106a and the mounting hole 106b arranged.
  • That of the light introduction means 101 eingelei tete light signal 131 is partially from the beam splitter plate 103 reflected, and the reflection light 132 is from the optical receiving element 102 detected. The light signal 131 passing through the beam splitter 103 was transmitted, the optical parts happened 104 and is from the Lichtausleitmittel 105 escorted out.
  • Thus, in the light communication module, the light signal to be transmitted becomes 131 partly from the optical receiving element 102 recorded to determine if the light signal 131 has been properly transferred or not.
  • In the light communication module, it is important that the light introducing means 101 , the optical parts 104 and the light discharge means 105 each directly with the body 106 are spliced. When every element in the through hole 106a of the body 106 is used and directly through the YAG welding 107 namely, a tube is as in the conventional example ( 9 ) not mandatory. The number of parts can be reduced and the steps of the manufacturing process can be simplified. The optical axis of each element may be connected to the through hole 106a even be aligned as a business size.
  • In such a case, it will be difficult, the parts provided therein 104 but it becomes a through hole 106a asserting mounting hole 106b used in the invention, and the optical parts 104 be through the YAG welding process 107 from the mounting hole 106b from splices. With a structure like that described above, each element can be easily spliced with high accuracy.
  • Further, a method of splicing each element to the body 106 include not only the YAG welding process, but also a connection by soldering or gluing. Or, a splicing operation may be performed by a pressurizing process or the like. In any case, the through hole becomes 106 formed with high accuracy, and the positioning operation of each element can be performed precisely.
  • Also, in another embodiment, the mounting hole 106b and the optical receiving element 102 be provided several times. It is an optical fiber 101 as Lichteinleitmittel 1 in the example of 6 provided, however, the light signal 131 from the light-emitting element in another embodiment of the optical receiving element 102 with the light introduction means 101 detected as an optical emission element, and it may also by the Lichtausleitmittel 105 be initiated.
  • Further, the optical communication module for both directions with the Lichteinleitmittel 1 be provided as an optical emission element.
  • below becomes another, from the claims uncovered module described.
  • This in 7 (A) shown optical communication module consists of a sleeve support member 112 that with the light introduction means 111 spliced, one with the optical fiber 111 provided sleeve 111b a lens holding member 113 in which a collimation lens 113a is held, a body 116 with optical parts 114 like those of the previous example provided inside thereof, a lens holding member 117 with collimating lens held in place 117a , and a sleeve support member 118 that with the Lichtausleitmittel 115 consisting of one with an optical fiber 115a provided sleeve 115b , is spliced. The splicing operation can be performed by the positional alignment of these elements in the XY direction to each other.
  • That is, the optical communication module can determine the positional alignment in the XY direction at every four places between the body 116 and between the lens support members 113 and 117 perform at both ends, as well as between these lens holder elements 113 . 117 and the sleeve support members 112 and 118 ,
  • Therefore, as magnified in 7 (B) is shown, even in a case of a lesser degree of parallelism at the two end faces of the body 116 a splicing operation by shifting between the lens holding members 113 . 117 and the sleeve support members 112 . 118 be made, with the collimated (parallel) light to the center of the body 116 is passed to perform a connection with less loss.
  • In this way, the displacement of the angle of the optical axis by the positional alignment in the XY direction can be at two places between the body 116 and the lens holding members 113 . 117 and between the lens holder elements 113 . 117 and the sleeve support members 112 . 118 be adjusted or adjusted.
  • The position alignment must be made only in the Z-axial direction to advance the sleeves 111b . 115b and the sleeve support members 112 . 118 to splice.
  • As another example, the in 6 construction shown with the mounting hole and the opti receiving element in the body 116 be provided.
  • below becomes another, from the claims uncovered module described.
  • In the optical communication module of such a construction as shown in FIG 6 and 7 Shown can be several optical parts in the bodies 106 and 116 be provided. Since only the arrangement structure of the optical parts, for example in 8th , shown can be the WDM filter 121 for dividing the light communication 131 through the wavelength, an insulator 122 and a beam splitter 123 be arranged on the straight line.
  • The WDM filter 121 reflects the light signal 131 of, for example, 1.48 μm wavelength and transmits the light signal 131 of 1.55 μm wavelength. The WDM filter 121 is obliquely arranged to separate the reflection light of 1.48 μm wavelength, resulting in transmission of only the light signal 131 of 1.55 μm wavelength, so it works as a filter. Because the WDM filter 121 is arranged obliquely, the transmission light signal 131 curved to cause the axial displacement L 1 .
  • Further, the insulator 122 composed of a polarizer and a rotator in combination. The insulator 122 allows the light signal 131 in a one-way direction (to the right in the drawing), but is designed so that it does not let it pass in an opposite direction. The light signal 131 causes the axial displacement L 2 due to a refraction when passing the insulator 122 ,
  • The beam splitter 123 , an obliquely arranged glass plate, reflects part of the light signal 131 and subdivides it to transfer the rest of it. For example, the reflection light is detected by a not-shown light-receiving element and can be monitored. That through the beam splitter 123 passing light signal 131 causes axial displacement L 3 due to refraction.
  • In this module, the axial displacements L 1 , L 2 and L 3 caused by each optical part can be corrected among each other. The mutual correction direction means that the axial displacement of each optical part takes place in one direction, so that the total axial displacement L becomes smaller. For example in 8th is the WDM filter 121 arranged so that an axial displacement L 1 is effected in the upward direction in the drawing, the insulator 122 is arranged so that the axial displacement L 2 is effected in the downward direction in the drawing, and the beam splitter 123 is arranged so that the axial displacement L3 can be effected upward in the drawing. Therefore, the total axial displacement L can be comparatively reduced by the correction of the mutual axial displacements.
  • In the example of 8th Although the axial displacements of all the optical parts are made alternately in a completely opposite direction, the axial displacement does not necessarily have to take place in a completely opposite direction. Each of the optical parts only has to be arranged in one direction, so that at least the total axial displacement L can be reduced.
  • The axial displacement direction is determined by a rotational position about an optical axis of each of the optical parts, namely, the WDM filter 121 , the insulator 122 and the beam splitter 123 established. Therefore, the positioning operation of the rotation direction need only be performed in advance so that the axial displacement of each optical part is different from another.
  • Or the amount of axial displacement can be determined by the thickness, the angle of inclination or the like of each optical part.
  • Accordingly, at an optical communication module in which optical parts in the in the body formed through hole are provided and a Lichteinleitmittel and a light extraction means disposed at both end portions of the through hole are the parts on the body attached under a condition in which the respective optical Axes of Lichteinleitmittels, the optical parts and the Lichtausleitmittels aligned with the center axis of the through hole, whereby simplifies the manufacturing step and reduces the number of parts becomes.
  • at an optical communication module in which optical parts in the body are provided and a Lichteinleitmittel and a Lichtausleitmittel are arranged at both ends thereof, the position alignment between the Lichteinleit- / Ausleitmitteln and the body through a lens holding member is performed be respectively between the Lichteinleit- / Ausleitmittel and the body added is. Since the adjustment of the XY direction between the body and the Lichteinleit- / Ausleitmitteln take place in two positions can, the adjustment can also be made when the shift at the angle of the optical axis takes place to the connection loss to reduce.
  • Further, in an optical communication Onsmodul, in which a plurality of optical parts are provided in the body, and a Lichteinleitmittel and the Lichtausleitmittel are spliced at both ends, the arrangement is such that the axial displacement between the incident light and the outgoing light at the plurality of optical parts can be mutually corrected , the total axial amount can be reduced and the connection loss can be minimized.

Claims (8)

  1. Optical communication module comprising: an optical transmission element ( 1 ) for emitting a light signal ( 20 ), an optical receiving element ( 2 ) for receiving a light signal ( 21 ), an optical fiber ( 5 ) for bidirectionally conducting the light signals ( 20 . 21 ) from / to these optical elements ( 1 . 2 ), an assignment body ( 3 ) located between the optical transmission element ( 1 ), the optical receiving element ( 2 ) and the optical fiber ( 5 ) is positioned to receive light signals from the optical transmission element ( 1 ) the optical receiving element ( 2 ) and the optical fiber ( 5 ) as well as the optical fiber ( 5 ) the optical receiving element ( 2 ) and a light non-recirculating chamber ( 8th ), in a body ( 7 ) of the module is provided at a position at which reflection light ( 23 ), of the optical transmission element ( 1 ) and at the assignment body ( 3 ) is reflected, characterized in that the light non-returning chamber ( 8th ) is constructed so that the entire reflection light ( 23 ), which enters the chamber ( 8th ), repeated in the chamber ( 8th ) is reflected and thereby diffused and absorbed.
  2. Optical communication module comprising: a light-emitting means ( 11 ) for directing a light signal into the module and a light-emitting means ( 15 ) for deriving a light signal from the module, an assignment body ( 13 ) located between the light-introducing means ( 11 ) and the light-emitting means ( 15 ) is provided to a part of the light signal from the light-introducing means ( 11 ) to the light-emitting means ( 15 ) and to reflect part of the light signal, an optical receiving element ( 12 ) for detecting the from the allocation body ( 13 ) reflected light signal, an element ( 14 ) for reflecting and returning a part of the object through the assignment body ( 13 ) transmitted light signal as a return light ( 25 ), and a non-recirculating light chamber ( 18 ), in a body ( 17 ) of the module is provided at a position at which a reflection light ( 23 ) of the assignment body ( 13 ) reflected return light ( 25 ), characterized in that the non-recirculating chamber ( 18 ) is constructed so that the entire reflection light ( 23 ), which enters the chamber ( 18 ), repeated in the chamber ( 18 ) is reflected and thereby diffused and absorbed.
  3. Module according to claim 1 or 2, characterized in that the light non-returning chamber ( 8th ; 18 ) as one in the body ( 7 ; 17 ) trained concave section ( 7a ; 17a ) and a pinhole ( 7b ; 17b ), through which the reflection light ( 23 ) into the chamber ( 8th ; 18 ) can penetrate.
  4. Module according to claim 3, characterized in that the needle hole ( 7b ; 17b ) Has 0.5 mm or less diameter.
  5. Module according to claim 3 or 4, characterized in that the light non-returning chamber ( 8th ; 18 ) another of a cover element ( 9 ; 19 ) has a closed opening.
  6. Module according to claim 5, characterized in that the cover element ( 9 ; 19 ) represents a light absorption element.
  7. Module according to claim 6, characterized in that the cover element ( 9 ; 19 ) of a metal, a resin or a ceramic material of an overall black tint or with a surface coated with a black coating layer, on which at least the reflection light ( 23 ), is shaped.
  8. Module according to one of claims 1 to 7, characterized in that the assignment body ( 13 ) is a beam splitter plate, a prism beam splitter or a hologram.
DE69734281T 1997-07-15 1997-07-17 Module for optical communications Expired - Fee Related DE69734281T2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19970112282 EP0892293B1 (en) 1997-07-15 1997-07-17 Module for optical communication

Publications (2)

Publication Number Publication Date
DE69734281D1 DE69734281D1 (en) 2006-02-09
DE69734281T2 true DE69734281T2 (en) 2006-06-29

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DE69734281D1 (en) 2006-02-09

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