• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to a protective housing (1) (3) for an optical component, consisting of a substrate made of a material having at least one integrated waveguide extending beyond the substrate by an optical fiber exiting the housing. The housing defines a sealed inner cavity 2 in which the component 4 is located. According to the invention, the pupil 2 is dimensioned to hold the part at a constant operating amount j i which prevents the effective transfer of stress between the housing 1, 3 and the part 4.
    公开号:KR19980702263A
    申请号:KR1019970705660
    申请日:1996-02-13
    公开日:1998-07-15
    发明作者:뤽 알렝 다누 띠에리；에릭 쟝 앙리 피르시옹
    申请人:알프레드 엘. 미첼슨；코닝 인코오포레이티드；
    IPC主号:
    专利说明:

    Protective housing for integrated optoelectronics
    FIELD OF THE INVENTION The present invention relates to a protective housing for an optical component, and more particularly to a substrate by an optical fiber having at least one integrated waveguide and exiting the housing defining an enclosed internal pupil in which the optical component is located. And a housing designed to protect the optical component made of the substrate made of an extended optical material.
    In particular, the housing may comprise integrated optical components such as couplers or multiplexers associated with optical fibers for the long-distance transfer of digital or analogue information in the form used in applications such as audio, video, or data processing, for example. Used to protect The integrated optical component is flat or rod-shaped made of a crystalline material or an amorphous optical material such as glass, for example, with a waveguide formed by ion diffusion inserted below one surface of a plate or rod. The end of the waveguide is connected with an optical fiber exiting the housing protecting the component.
    The part is so brittle that it must be effectively protected from mechanical stresses and stresses that can destroy it and other physical or chemical phenomena that can damage it, including temperature changes or contact with water by moist air. For this reason, the part is generally placed in a rigid container sealed by filling the remaining space between the part and the housing with a photocurable or thermosetting resin to prevent contact with wet air or other air containing damaging components. As can be seen by standard tests applicable to these components, a set of integrally connected materials can destroy components located inside the housing under stress and pressure caused by differential thermal expansion over a wide range of temperature changes. have.
    In order to solve this problem, EP 106 116 is made of a material having the same coefficient of thermal expansion as glass, such as an iron-nickel alloy known as INVAR ™ , on a support attached to a tubular screen made of the same material. It has been proposed to insert the part inside the housing. As a result, a suitable composite protective structure comprising a plurality of parts that can be assembled was obtained.
    It is an object of the present invention to provide a protective housing for an integrated optical component, said housing being designed to prevent damage or destruction of these components under the influence of stresses and pressures caused by various factors, in particular the differential thermal expansion coefficient, and a simple structure It is automatically assembled (assembled) and sealed.
    The above and other objects can be achieved through the housing for an optical component of the present invention. The housing for an optical component of the invention consists of a substrate made of a material having at least one integrated waveguide extending beyond the substrate by an optical fiber exiting the housing defining a closed inner pupil in which the optical component is located, said The pupil is dimensioned to hold the part in an amount of play that prevents effective transfer of stress, strain or pressure between the housing and the part.
    Because of this amount of operation, the housing is disconnected from the optical component by transfer of any mechanical stress applied to the housing by manipulation, support vibration, adhesive straps, or the like, or by differential thermal expansion. Thus, this unbonding protects the fragile components from the application of such stresses, which can break or damage them.
    According to a preferred embodiment of the present invention, the housing is at least one flow unit that is somewhat pressed between the two surfaces of the component and the pupil in the housing to prevent any potential vibration of the component in the pupil. It includes.
    Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.
    1 is a partial longitudinal sectional view of a housing according to the invention in which an integrated optical component to be protected is fixed.
    FIG. 2 is a cross-sectional view illustrating the housing cut along the cutting line II-II in FIG. 1.
    3 is a perspective view of a waterproof joint forming a part of a housing according to the invention.
    4 and 5 are cross-sectional views showing before and after assembly of the housing according to the present invention, respectively.
    Reference is made to the accompanying figures 1 and 2, which are cross sectional views of the housing according to the invention. As shown in the figure, two housings are shown since the housing is generally bilaterally symmetrical with respect to plane P.
    The housing essentially comprises a base 1 comprising a generally parallelepiped pupil 2 sealed by a lid 3. The lid comprises a recess 3 1 to which a label indicating a part contained in the housing can be attached. The pupil 2 in the base is shaped to accommodate the integrated optical component 4 and is generally complementary to the optical component. Such parts are traditionally made of an aid to a substrate made of optical or crystalline materials, such as glass. Waveguides 6 1 , 6 2 , 6 3 , etc., produced by ion diffusion, for example, are inserted below the upper surface 5 of the part (see FIG. 2). Each end of the waveguide is connected to one end of an exposed optical fiber 7 1 (7 2 ) (7 3 ) and the like, the fiber being between the two waterproof joints 9 1 and 9 2 . It is covered by a protective jacket (8 1 ) (8 2 ) (8 3 ) and the like before exiting.
    The connection of each fiber to the end of the corresponding waveguide can be ensured by a trace amount of adhesive 10 1 , while another large amount of adhesive 11 ensures a mechanical bond between the substrate and the fiber set.
    Such integrated optical components are well known, for example, from French patent application No. 2 674 033 filed by the applicant. In the case where the number of fibers exiting one end of the housing is generally different from the number of fibers exiting the other end of the same housing, such components may consist of couplers with M inputs and N outputs, or multiplexers.
    According to a feature of the invention, the pupil 2 formed in the housing has a mechanical action which prevents all effective transfer of stress between the base 1 and the cover 3 of the housing on the one hand and the integrated optical component on the other. Dimensioned to keep the part with quantity. Thus, since the part is simply located within the pupil 2 without attachment by an adhesive, the part does not form an integral part of the housing, after which each of these factors extends to another if the temperature changes. And thus restricts all applications to stressed parts 4 caused by parallax expansion which can damage or destroy the parts.
    The unbonded makes it possible to select the housing material because it can be molded without having to take into account its thermal expansion coefficient, which material is preferably resistant to shock or impact, for example. Thus, the product may be chosen to consist of a liquid crystalline polymer or polycarbonate filled with glass fibers such as, for example, a product named VECTRA A 130 in the catalogs of HOECHST AG and Hoechst Celanese Corporation.
    The amount of operation necessary for the non-combination may be provided to the entire part. For example, a constant operating amount j 1 is provided between the two contact surfaces of the component and the housing, while another operating amount j 2 is provided between the component and the cover 3 (see FIG. 1). , Other operating amounts j 3 and j 4 are provided between the transverse contact surfaces (see FIG. 2). For example, for a part occupying a space of 50 × 5 × 5 mm, each operation amount j 1 may be about 0.3 mm.
    Although it is possible to solve the problem consisting of absorption of differential thermal expansion in the presence of these operating quantities, nevertheless under certain circumstances, they may not be able to Vibration is possible.
    According to one preferred embodiment of the present invention, such vibration is sufficient in such a way that the housing avoids re-forming the transmission passage for exposed mechanical stress, or the stress passage caused by parallax (thermal) expansion. While the amount of force remaining is suppressed through the preparation of at least one flow unit in the cavity of the housing, which is press-formed between one side surface of the part and one side contact wall of the pupil, large enough to suppress any initial vibration of the part. do.
    Such a unit may be advantageous in the form of a flowing lip 12 shaped along the unit with the base 2 of the housing and shaped to extend somewhat into the pupil in the absence of the part 4. As shown in FIG. 2, some such ribs may be provided, for example, in the lateral wall of each pupil. In a modified form, the forces developed by these lips can be different to suppress any resonance that may be caused as a result of vibrations applied to the housing.
    In another variation, these ribs can be replaced by flow ribs 13 formed on two contact lateral walls of the pupil, as shown by the dashed lines in FIG. 1. The rib has a triangular cross section and a chamfer 3 1 in the head to facilitate insertion of the component 4 into the base 1 of the housing.
    3 shows a preferred embodiment of the waterproof joints 9 1 and 9 2 inserted respectively in the recesses of the base 1 and cover 3 of the housing provided for receiving the joints. These joints, which are identically made of a flow material (e.g., an elastomer with very low modulus), are a series of parallel, generally semi-cylindrical, gutters (14 1 ) (14 2 ) (14 3 ) ), Each of which is closely applied with a fiber having a protective sheath 8 1 , 8 2 , 8 3 , etc. in a flat ribbon exiting the housing. The pair of joints holding the ribbons ensure the physical waterproofing of the housing while allowing the fiber in and out. However, due to the nature of the material that holds these joints, if the internal temperature of the housing raises the relative pressure of the water vapor to such an extent that the parts are damaged, the joint cannot prevent the slow movement of water vapor from the inside of the housing to the outside.
    As shown in Figs. 1 and 2, their exits exiting out of the housing are rounded sides 15 1 in the plane of the ribbon (see Fig. 2) and in a plane perpendicular to the back plane (see Fig. 1 ). (15 2 ) (15 3 ). Thus, the fibers exiting the housing can be drawn in a direction diverging in the direction of their axis inside the housing (see the section indicated by the dashed line in FIG. 1), and the change in direction is a constant of the curve which can prevent the breakage of the fibers. Minimum radius r (ie, the radius of the curve of the rounded area on which the fiber is laid). For example, a radius r = 2 mm can be chosen.
    The base 1 and cover 3 of the housing are obtained and assembled as follows during the molding of the plastic material and the assembly of the unit consisting of the optical component and its protective housing.
    After the rod fibers 7 1 are connected by well-known operating means consisting of the deposition of traces of adhesive and the micro-multiplexing of the fibers at the ends of the waveguide forming the integral part of the substrate of the part, the part is connected to the base ( The pupils in the base 1 guaranteeing the fiber portion located in the fiber sheath 8 1 passing through the garter 14 1 at two joints 9 1 and 9 2 located at the two ends of 1 ). 2) is inserted. For example, a waterproof lubricant having silicone in its so-called mechanical form or base component may be used to enhance the resistance of the part against moisture present in the air and other damaging reagents that may be carried by the air. It can be injected into the space separating the parts 4 from each other. This injection is performed taking into account the expansion volume for the lubricant to prevent any overpressure effects associated with the expansion of the lubricant.
    The cover 3 is then inserted into the base 1 in the pre-assembly state shown schematically in FIG. 4. In the figure, some securing tabs 16 1 and 16 2 extend from the cover to the peripheral living 18 to pass into corresponding slots 17 1 and 17 2 formed in the base, which fixing tabs Because of its fluidity, it passes and is then fixed on the base 1 if necessary, for example in a housing where the cover can be easily removed for inspection of the installation of the part.
    This pre-assembly step makes it easy to manipulate the final assembly until the cover is welded to the base (not shown), for example ultrasonically welded. In this step, the cover is provided with the VV line of FIG. 1 while transferring appropriate ultrasonic vibrations to the lid to ensure welding of the cover 3 to the base 1 at the location of their outer surface indicated by reference numeral 19 in the drawing. Is maintained by the ultrasonic head placing it in the final welding position shown in FIG.
    All these operations themselves provide for the automation of the process, which consists in the insertion of the part in the housing.
    The present invention relates to a simple structure housing that can be automated in assembly, and it is possible to achieve the above object through the provision of a protective housing for an integrated optical component that is protected from the effects of differential thermal expansion or mechanical stress that the housing can possibly undergo. .
    权利要求:
    Claims (10)
    [1" claim-type="Currently amended] Consisting of a substrate made of a material having at least one integrated waveguide 6 i extending beyond the substrate by an optical fiber 7 i exiting the housing defining an enclosed inner cavity 2 in which the optical component is located. In the protective housing for an optical component 4, the pupil 2 is dimensioned to hold the component at a constant operating amount j i that prevents effective transfer of stress between the housing and the component 4. A protective housing for an optical component.
    [2" claim-type="Currently amended] 2. The housing according to claim 1, wherein the housing is somewhat between the two contact surfaces of the component (4) and the pupil (2) in the housing (1) (3) to prevent potential vibration of the component (4) in the pupil (2). A protective housing for an optical component comprising at least one flowable unit (12) (12 ') (13) pressed.
    [3" claim-type="Currently amended] 3. The lip (12) 12 'according to claim 2, wherein the flowable unit is formed along the unit with the walls of the housing (1) (3) and extends beyond one surface of the pupil (2) formed in the housing. A protective housing for an optical part, characterized in that the form.
    [4" claim-type="Currently amended] 3. Protective housing for an optical component according to claim 2, characterized in that the flowable unit is in the form of a flow living (13) formed on one side wall of the pupil (2) in the housing.
    [5" claim-type="Currently amended] 5. The housing according to claim 1, wherein the housing comprises a base 1 with a pupil 2 formed therein, and a cover 3 adjacent the pupil 2, the cover 3 being a base. Of the cover 3 and the base 1 in a relative position different from that corresponding to their permanent assembly provided with a plurality of fixing tabs 16 1 designed to cooperate with complementary living 18 within (1). Protective housing for an optical component, characterized by instantaneous pre-assembly.
    [6" claim-type="Currently amended] 6. A protective housing for an optical component as recited in claim 5, wherein the cover has a suitable recess for attaching a label on the outer surface.
    [7" claim-type="Currently amended] 7. The base (1) and cover (3) according to claim 5 or 6, in which the housing (1) (3) is in close contact with the optical fibers (7 1 ) (8 1 ). A protective housing for an optical component, characterized in that it receives a waterproof joint (9 1 ) (9 2 ) suitable for receiving the fibers (7 1 ) (8 1 ) in a complementary passage in form.
    [8" claim-type="Currently amended] 7. The housing according to any one of the preceding claims, wherein the housing has a rounded surface 15 1 at the position at which the optical fiber exits, the rounded surface suitable for the fiber by a predetermined minimum radius of curvature r. The protective housing for an optical component, characterized in that for supporting.
    [9" claim-type="Currently amended] 8. Protective housing according to any one of the preceding claims, characterized in that the housing is provided with an integrated optical component (4).
    [10" claim-type="Currently amended] 10. Protective housing for an optical component according to claim 9, characterized in that a waterproof lubricant is provided in the space separating the component (4) from the wall of the pupil (2).
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    同族专利:
    公开号 | 公开日
    FR2730820A1|1996-08-23|
    WO1996025679A1|1996-08-22|
    CN1176006A|1998-03-11|
    CA2210932A1|1996-08-22|
    FR2730820B1|1997-06-06|
    AU704852B2|1999-05-06|
    AU4979396A|1996-09-04|
    JPH11500239A|1999-01-06|
    EP0821800A4|1998-02-04|
    EP0821800A1|1998-02-04|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    1995-02-17|Priority to FR95/01862
    1995-02-17|Priority to FR9501862A
    1996-02-13|Application filed by 알프레드 엘. 미첼슨, 코닝 인코오포레이티드
    1998-07-15|Publication of KR19980702263A
    优先权:
    申请号 | 申请日 | 专利标题
    FR95/01862|1995-02-17|
    FR9501862A|FR2730820B1|1995-02-17|1995-02-17|Protective housing for integrated optical component|
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