JP4898640B2 - Optical device package and manufacturing method thereof - Google Patents

Description

  The present invention relates to an optical element package and a method for manufacturing the same, and more particularly to an optical element package for drawing an optical fiber out of the package airtightly and a method for manufacturing the same.

  In recent years, high-speed and large-capacity optical communication systems have been put into practical use, and development of high-speed and small-sized optical elements such as light-emitting elements, light-receiving elements, and modulation elements to be incorporated into such optical communication systems has been actively promoted. ing. In an optical communication system, an optical element is required to operate stably over a period exceeding 20 years. For this reason, in order to suppress deterioration of the optical element, the optical element needs to be hermetically sealed.

  A conventional optical element package having a housing for accommodating an optical element and drawing out (or drawing into) the optical fiber coupled with the optical element from the inside of the casing through the optical fiber insertion pipe includes an optical fiber insertion pipe There is one that hermetically seals the inside of a package including an optical fiber inside (for example, see Patent Document 1). FIG. 9 shows the structure of the optical fiber lead-out sealing portion of the conventional optical element package.

  As shown in FIG. 9A, the sealing portion includes (1) a step of bonding and fixing the optical element 101 inside the housing 102 to which the optical fiber insertion pipe 104 is fixed in advance by welding or the like, and (2) An optical fiber 103 having an optical fiber strand portion made of an optical fiber strand 103b partially coated with a metal coat 103a and an optical fiber sheath portion formed by coating the optical fiber strand 103b with a coating 103c, A step of bonding the optical fiber 103b of the optical fiber 103 and the optical element 101 with the adhesive 105 on the optical fiber alignment device, and (3) on the optical fiber alignment device. The step of hermetically sealing the housing 102 with the solder 106 between the optical fiber insertion pipe 104 and the metal coat 103a, and (4) the optical fiber 103 on the optical fiber alignment device. In order to reinforce the strength against tension and bending, the step of fitting the outer pipe 107 into the optical fiber insertion pipe 104 and fixing with the reinforcing adhesive 108, and (5) the lid member (not shown) by seam welding or the like It is formed through a process of fixing to the housing 102.

  For example, when an LN modulator that is a waveguide type electro-optic element is adopted as the optical element 101, the optical coupling efficiency between the optical waveguide formed on the surface of the optical element and the optical fiber is increased (that is, the optical waveguide and 9 (b), the optical waveguide 101b formed in the optical element 101 and the end face of the optical fiber 103 are angled as shown in FIG. In general, an oblique incident coupling method is employed. In this case, as shown in FIG. 9C, the optical fiber is inserted obliquely with respect to the axis of the optical fiber insertion pipe 104.

Conventionally, in order to obtain an optical fiber coupling angle necessary for optical coupling between an optical fiber and an optical element, a method has been adopted in which the position of the optical fiber insertion pipe 104 is set to a predetermined angle (for example, , See Patent Document 2).
JP-A-3-259105 Japanese Patent Laid-Open No. 7-199003

  However, in the conventional optical element package disclosed in Patent Document 1, the hermetic sealing operation after bonding the optical fiber and the optical element (the above operation (3)), and further the strength outside the hermetic sealing portion are reinforced. Is manufactured by performing the work of fitting and bonding the outer pipe (the above work (4)) for each housing on the optical fiber aligning device. There existed a subject that work and sealing work could not be performed collectively to a plurality of cases.

  Further, in the conventional optical element package disclosed in Patent Document 2, it is necessary to change the design of the optical element package itself in order to obtain an optical fiber coupling angle necessary for optical coupling between the optical fiber and the optical element. In addition, there is a problem that the degree of freedom in the component arrangement design of the external device on which the optical element package is mounted is reduced.

  The present invention has been made to solve the conventional problems, and can improve the workability of the hermetic sealing operation and can easily adjust the optical fiber coupling angle. And it aims at providing the manufacturing method.

  In order to solve the above-described problems, an optical element package according to the present invention includes a casing that accommodates an optical element, an optical fiber element portion that includes an optical fiber element, and a coating applied to the optical fiber element. An optical fiber comprising: an optical fiber covering portion; and an optical fiber that is optically coupled to the optical element; and an optical fiber insertion pipe that extends from at least one side surface of the casing and allows the optical fiber to pass through the casing. In the element package, the optical fiber insertion pipe includes a cylindrical part and a semi-cylindrical part partly cut away, and the optical fiber coating part of the optical fiber is connected to the optical fiber insertion pipe. The casing is fixed by a cylindrical portion, and the casing is hermetically sealed between the optical fiber portion and the cylindrical portion of the optical fiber.

  With this configuration, the workability of the hermetic sealing operation can be improved, and the optical fiber coupling angle can be easily adjusted.

  Further, the optical element package of the present invention has a configuration in which a ratio M / L between the total length L of the optical fiber insertion pipe and the length M of the semi-cylindrical portion is 0.5 or more and 0.9 or less. ing.

  With this configuration, the optical fiber can be temporarily fixed and fixed with sufficient strength.

  Further, the optical element package of the present invention has a configuration in which a ratio M / L between the total length L of the optical fiber insertion pipe and the length M of the semi-cylindrical portion is 0.1 or more and less than 0.5. ing.

  With this configuration, bending or bending of the optical fiber insertion pipe can be suppressed.

  In the optical element package of the present invention, the semi-cylindrical portion includes a first semi-cylindrical portion having a first cross-sectional area perpendicular to the axis of the optical fiber insertion pipe, and the first cross-sectional area. And a second semi-cylindrical portion having a second cross-sectional area perpendicular to the axis of the optical fiber insertion pipe.

  With this configuration, since heat conduction to the first semi-cylindrical portion is suppressed, it is possible to effectively heat the optical fiber insertion pipe during melting of the solder, and the second semi-cylindrical portion is sufficient. The optical fiber can be temporarily fixed with sufficient strength.

  Moreover, the optical element package of this invention has the structure where the said semi-cylindrical part has a slit.

  With this configuration, it is possible to effectively heat the optical fiber insertion pipe when melting the solder.

  The optical element package manufacturing method of the present invention includes an optical fiber insertion pipe that includes a cylindrical portion and a semi-cylindrical semi-cylindrical portion that is partially cut out, extending from at least one side surface of the housing. An optical fiber including an optical fiber strand portion made of an optical fiber strand and an optical fiber coating portion formed by coating the optical fiber strand, and the optical fiber strand of the optical fiber is inserted. Optical fiber adhering step for adhering the optical element housed in the housing and the optical element, and a temporary fixing step for temporarily fixing and fixing the optical fiber coating portion of the optical fiber to the semi-cylindrical portion of the optical fiber insertion pipe A sealing step of hermetically sealing the housing between the optical fiber strand portion of the optical fiber and the cylindrical portion of the optical fiber insertion pipe, and the optical fiber insertion pipe and the optical fiber. Wrapped with outer pipe In has a structure comprising an outer pipe bonding step of bonding.

  By this method, it is possible to improve the workability of the hermetic sealing work and to manufacture an optical element package that can easily adjust the optical fiber coupling angle.

  In the method of manufacturing an optical element package according to the present invention, the optical fiber bonding step and the temporary fixing step are performed on an optical fiber alignment device, and the sealing step and the outer pipe bonding step are performed on the optical fiber alignment device. It's something you do outside.

  By this method, an optical element package capable of improving the workability of the hermetic sealing work can be manufactured.

  The present invention relates to a cylindrical portion for hermetically sealing a housing between an optical fiber insertion pipe and an optical fiber strand portion of the optical fiber, and a half tube for fixing the optical fiber coating portion of the optical fiber. By having a multi-stage configuration with the shape portion, it is not necessary to perform the work of fitting and bonding the outer pipe on the optical fiber aligning device, and the workability of the hermetic sealing work can be improved. Furthermore, since the optical fiber coupling angle can be increased, the coupling angle between the optical element and the optical fiber can be easily adjusted to a suitable angle.

Hereinafter, embodiments of an optical element package according to the present invention will be described with reference to the drawings.
(First embodiment)
FIG. 1 shows a first embodiment of an optical element package according to the present invention. 1A is a cross-sectional view of the optical element package, and FIG. 1B is an exploded perspective view showing the configuration of the optical element package.

  That is, as shown in FIGS. 1A and 1B, the optical element package 1 according to the first embodiment includes a housing 12 that accommodates the optical element 11, and light that is partially coated with a metal coat 13a. An optical fiber 13 comprising a fiber strand 13b, and an optical fiber sheathing portion formed by coating the optical fiber strand 13b with a coating 13c. An optical fiber insertion pipe 14 is provided that extends from at least one side surface and allows the optical fiber 13 to be inserted into the housing 12.

  Furthermore, as shown in FIG. 2, the optical fiber insertion pipe 14 includes a cylindrical portion 14a and a semi-cylindrical portion 14b partially cut away. As will be described in detail later, the housing 12 is hermetically sealed by the solder 15 between the cylindrical portion 14a and the metal coat 13a of the optical fiber 13, and the coating 13c of the optical fiber 13 is formed in the semi-cylindrical portion 14b. Temporarily fixed.

The optical element 11 shown in FIG. 1 is, for example, a waveguide type LN optical modulator chip. The LN optical modulator chip thermally diffuses Ti or the like on a LiNbO ₃ (lithium niobate) substrate, which is a ferroelectric material having an electro-optic effect, to form an optical waveguide having a relatively high refractive index on the substrate surface. This is an optical element in which a microwave propagation waveguide (for example, a coplanar line) for propagating microwaves is formed on a substrate, and an electric field caused by the microwaves is applied to the light waves propagating through the optical waveguide to modulate by the electrooptic effect.

  The casing 12 is made of a metal material such as stainless steel (SUS) or Kovar, and fixes the optical element 11 such as a waveguide type LN optical modulator chip inside.

  The optical fiber 13 includes an optical fiber strand 13b having a core for confining and propagating a light wave, and nylon for enclosing the optical fiber strand 13b to protect scratches on the strand and reinforcing the strength of the optical fiber itself. Coating 13c. The covering 13c is bonded to the optical fiber insertion pipe 14 and the outer pipe 16 with a reinforcing adhesive 17 in order to reinforce the strength of the portion of the optical fiber 13 that is hermetically sealed with solder.

  Further, as the metal coat 13a of the optical fiber 13, a metal coat such as Au formed by a plating method or a vapor deposition method is used in order to improve the wettability of the solder.

  A method for manufacturing an optical element package according to the present invention will be described below with reference to the drawings.

  As shown in FIGS. 3 to 5, the method for manufacturing an optical element package according to the present invention includes (1) an optical element bonding step for bonding and fixing the optical element 11 inside the housing 12, and (2) optical fiber adjustment. The optical fiber 13 is inserted into the optical fiber insertion pipe 14 fixed to the housing 12 on the core device, and the optical fiber strand 13b of the optical fiber 13 and the optical element 11 fixed to the housing 12 are bonded to the adhesive 18. (3) a temporary fixing step of temporarily fixing and fixing the coating 13c of the optical fiber 13 to the semi-cylindrical portion 14b of the optical fiber insertion pipe 14, and (4) a cylinder of the optical fiber insertion pipe 14. A sealing step of hermetically sealing the housing 12 by pouring molten solder between the shape portion 14a and the metal coat 13a of the optical fiber 13, and (5) the optical fiber insertion pipe 14 and the optical fiber 13 are connected to the outer pipe 16 And an outer pipe adhering step of adhering wrap.

  That is, in the optical element bonding step (1), the optical element 11 is bonded and fixed inside the housing 12 to which the optical fiber insertion pipe 14 is fixed in advance by welding or the like (FIG. 3 (1)).

  In the optical fiber bonding step (2), the casing 12 to which the optical element 11 is bonded and fixed is fixed to the optical fiber aligning device, and the optical fiber 13 is inserted into the optical fiber insertion pipe 14 and drawn into the casing 12. To be close to the end face 11 a of the optical element 11. The optical axis is aligned and the end face 11a and the optical fiber 13b of the optical fiber 13 are adjusted to a position where sufficient optical coupling can be obtained. In this state, the optical fiber 13b and the end face 11a are bonded with the adhesive 18. Fix (Fig. 3 (2)).

  Usually, in order to increase the connection area between the optical fiber strand 13b and the end face 11a, a glass bead-shaped reinforcing member (not shown) is attached to the tip of the optical fiber strand 13b. In addition, a metal coat such as Au may be applied in advance to a portion that is hermetically sealed with solder in the sealing step (4) described later inside the cylindrical portion 14a of the optical fiber insertion pipe 14.

  In the temporary fixing step (3), the coating 13c of the optical fiber 13 is temporarily fixed to the semi-cylindrical portion 14b of the optical fiber insertion pipe 14 with an adhesive 19 such as a UV curable adhesive (FIG. 4 (3)). When the housing 12 has a plurality of optical fiber insertion pipes, the optical fiber bonding step (2) and the temporary fixing step (3) are repeated for each optical fiber insertion pipe. And the housing | casing 12 after passing through all the optical fiber adhesion processes (2) and temporary fixing processes (3) is removed from an optical fiber aligning apparatus.

  The connection point between the end face 11a of the optical element 11 and the optical fiber 13b of the optical fiber 13, and the temporarily fixed fixing position between the semi-cylindrical portion 14b of the optical fiber insertion pipe 14 and the coating 13c of the optical fiber 13 are as follows. In the meantime, it is possible to give the optical fiber 13 an extra length. In this case, the optical element 11 and the optical fiber 13 can be coupled so that the coupling characteristics of the optical element 11 and the optical fiber 13 are not affected by the change in the environmental temperature, and the usable environmental temperature range of the optical element package. Is no longer restricted.

  In the sealing step (4), the solder is melted using a soldering iron, a high-frequency heater, a laser, or the like, and the housing is formed between the metal coat 13a of the optical fiber 13 and the cylindrical portion 14a of the optical fiber insertion pipe 14. The body 12 is hermetically sealed (FIG. 4 (4)).

  At this time, it is necessary to heat the optical fiber insertion pipe 14 in order to melt the solder as the sealing material. However, in the conventional optical element package, the optical fiber strand 13b of the optical fiber 13 is damaged by this heating. There was a problem that the coating 13c such as nylon was melted.

  However, since the structure of the optical fiber insertion pipe 14 of this embodiment is a multi-stage configuration of the cylindrical portion 14a and the semi-cylindrical portion 14b, the heat applied to the cylindrical portion 14a is a half-cylinder having a relatively small cross-sectional area. It is difficult to conduct heat to the shape portion 14b.

  Therefore, the cylindrical portion 14a hermetically sealed by the solder 15 is effectively heated, the solder as the sealing material is easily melted, workability is improved, and damage to the optical fiber 13b and the coating 13c is caused. However, it has the advantage of being less than the conventional structure.

  Furthermore, since the semi-cylindrical portion 14b acts as a receiving tray for the molten solder, there is a problem that the molten solder material droops compared to the conventional structure in which the solder material is poured into the inside from the end surface of the cylindrical portion 14a. However, since it easily penetrates into the cylindrical portion 14a, the sealing can be surely performed.

  In the outer pipe bonding step (5), in order to reinforce the strength of the optical fiber 13 against pulling or bending, the outer pipe 16 is fitted into the optical fiber insertion pipe 14 and fixed with a reinforcing adhesive 17 (FIG. 5 ( 5)).

  Finally, the lid member 20 shown in FIG. 1B is fixed to the housing 12 by seam welding or the like, and the optical element package 1 is completed.

  Here, a setting criterion for the ratio M / L of the length M of the semi-cylindrical portion 14b to the total length L of the total length L of the cylindrical portion 14a and the semi-cylindrical portion 14b of the optical fiber insertion pipe 14 will be described. By increasing M / L, the coupling angle between the optical fiber 13 and the optical element 11 can be increased. However, if M / L becomes too large, sufficient strength cannot be obtained when the outer pipe 16 is fitted. Problems such as bending and bending of the optical fiber insertion pipe 14 occur.

  On the other hand, if M / L is too small, the area for temporarily fixing the coating 13c of the optical fiber 13 is narrowed, and the adhesive strength between the coating 13c and the semi-cylindrical portion 14b of the optical fiber insertion pipe 14 is reduced. When the optical element package 1 is removed from the optical fiber aligning device after being temporarily fixed, there is a problem that the optical fiber 13 is detached from the optical element package 1.

  According to the results of experiments conducted by the present inventors, when an optical fiber insertion pipe 14 having a normal inner diameter of 1.5 mm and a length of 10 mm is used, if M / L is 0.5 or more and 0.9 or less, It is known that the cover 13c is temporarily fixed with sufficient strength, and if it is 0.1 or more and less than 0.5, sufficient strength as the optical fiber insertion pipe 14 of the optical element package 1 can be obtained.

  Further, since the cylindrical portion 14a of the optical fiber insertion pipe 14 is an area that hermetically seals the inside and outside of the optical element package, the length of this portion is taken into account when problems such as moisture permeability are taken into consideration. Affects the lifetime of optical elements. Therefore, M / L may be set according to the optical element housed in the optical element package, the actual usage method of the optical element package, and the purpose of use.

  Next, in the optical coupling between the optical fiber 13 and the optical waveguide 11b at the end surface 11a of the optical element 11, when performing oblique incident optical coupling in which the optical fiber 13 and the end surface 11a are coupled at an angle, It will be described with reference to FIG. 6 that the problem that the required optical fiber coupling angle cannot be obtained is improved by the present invention.

  FIG. 6A is a view corresponding to the stage of the optical fiber bonding step (2) shown in FIG. In FIG. 6A, L is the total length of the cylindrical portion 14a and the semi-cylindrical portion 14b of the optical fiber insertion pipe 14, M is the length of the semi-cylindrical portion 14b, and N is the casing 12. Is the distance from the end of the optical element 11 to the end surface 11a of the optical element 11, Φ is the inner diameter of the cylindrical portion 14a of the optical fiber insertion pipe 14, and θ is the angle formed by the optical fiber 13 and the central axis of the optical fiber insertion pipe 14. Represents the bond angle. At this time, the optical fiber insertion pipe 14 is fixed to a certain length L, the length M of the semi-cylindrical portion 14b is changed, and the length of the semi-cylindrical portion 14b with respect to the length of the optical fiber insertion pipe 14 is changed. FIG. 6B shows the calculation result of the optical fiber coupling angle θ that can be set when the ratio M / L is changed.

  In this graph, the case where the horizontal axis is 0 is the optical fiber coupling angle θ that can be set when the conventional optical fiber drawing pipe structure is used. However, since the optical fiber operating range at the time of optical fiber alignment is actually required, the settable angle range is shallower than the calculation result.

  Since the optical fiber insertion pipe 14 of the optical element package 1 according to the present invention has a multistage configuration of the cylindrical portion 14a and the semi-cylindrical portion 14b, the total length L of the cylindrical portion 14a and the semi-cylindrical portion 14b is combined. However, since the pipe length (5 to 30 mm) necessary for fitting the outer pipe 16 as described above can be obtained, an optical fiber coupling angle θ larger than that of the conventional structure can be obtained. An angle of about 5 to 10 ° required as an oblique incidence method for reducing the amount of light reflection at the optical coupling portion between the optical waveguide 11b and the optical waveguide 11b can be easily obtained.

  In the description using FIG. 6 above, the optical fiber coupling angle θ is taken as an example in which a necessary angle can be obtained in the horizontal direction with respect to the paper surface. However, the position of the semi-cylindrical portion 14b of the optical fiber insertion pipe 14 It is also possible to obtain a necessary angle in an arbitrary direction with respect to the paper surface by rotating and attaching to the housing 12.

  As described above, in the optical element package of the first embodiment, the optical fiber insertion pipe has a cylindrical portion for hermetically sealing the housing with the optical fiber strand portion of the optical fiber, The multi-stage configuration with the semi-cylindrical part for fixing the optical fiber coating part of the fiber enables the housing after the alignment work to be removed from the optical fiber alignment apparatus, so that hermetic sealing The workability of the work can be improved.

  Specifically, for example, after performing a temporary fixing process on a plurality of optical element packages with an optical fiber alignment device, an optical fiber alignment apparatus is applied to the plurality of optical element packages that have undergone the temporary fixing process. The sealing process and the outer pipe bonding process can be performed together outside, and workability can be improved. In addition, since the optical fiber alignment device is in an empty state during the sealing step and the outer pipe bonding step, the sealing step of the plurality of optical element packages up to a temporary fixing step with respect to another plurality of optical element packages. Etc., and the efficiency of productivity can be improved.

  Furthermore, since the optical fiber insertion pipe has a multi-stage configuration of a cylindrical portion and a semi-cylindrical portion having a smaller cross-sectional area than the cylindrical portion, the optical fiber coupling angle can be easily adjusted. When performing hermetic sealing with solder, the cylindrical portion is effectively heated, and damage to the optical fiber can be reduced.

(Second Embodiment)
A second embodiment of the optical element package according to the present invention will be described. In this embodiment, the optical fiber insertion pipe has a structure shown in the perspective view of FIG. About another structure, it is the same as that of 1st Embodiment, and it is the same also about a manufacturing process. The optical fiber insertion pipe 24 shown in FIG. 7 includes a cylindrical portion 24a, a first semi-cylindrical portion 24b having a first sectional area perpendicular to the axis of the optical fiber insertion pipe 24, and a first sectional area. It has a configuration that includes a second semi-cylindrical portion 24 c having a second cross-sectional area perpendicular to the axis of the optical fiber insertion pipe 24.

  In this way, the semi-cylindrical part is further divided into multiple stages, and the surface area of the second semi-cylindrical part 24c on which the optical fiber 13 is temporarily fixed is increased, thereby increasing the adhesive fixing strength of the temporary fixing. In addition, it is possible to eliminate the temporary fixing adhesion during the sealing operation and to increase the bonding area between the optical fiber insertion pipe and the outer pipe, so that the adhesive strength between the optical fiber insertion pipe and the outer pipe is also increased. Further, since the cross-sectional area of the first semi-cylindrical part 24b connected to the cylindrical part 24a is narrow, heat conduction to the first semi-cylindrical part 24b is suppressed, and the cylindrical part 24a at the time of solder melting is suppressed. Is more effectively performed.

(Third embodiment)
A third embodiment of the optical element package according to the present invention will be described. In this embodiment, the optical fiber insertion pipe has a structure shown in the perspective view of FIG. About another structure, it is the same as that of 1st Embodiment, and it is the same also about a manufacturing process. The optical fiber insertion pipe 34 shown in FIG. 8 has a configuration including a cylindrical portion 34a and a semi-cylindrical portion 34c provided with a slit 34b.

  Therefore, since the slit 34b is provided in the semi-cylindrical portion 34c, the heat conduction to the semi-cylindrical portion 34c is further suppressed, and the heating to the cylindrical portion 34a at the time of melting the solder is performed more effectively. .

  In the above-described embodiment, the solder sealing method has been described as an example of the sealing method in the optical fiber insertion pipe. However, the present invention is not limited to the solder sealing method, and the glass is used. The effect is the same in the hermetic sealing method. Furthermore, the same effect can be obtained in an airtight sealing method that does not require heating of the optical fiber insertion pipe, such as a resin sealing material such as epoxy or silicon.

  Further, the description has been given by taking the LN modulator, which is a waveguide type electro-optical element, as an optical element, but the optical element accommodated in the optical element package of the present invention is not limited to the LN modulator, and is a semiconductor laser. The present invention can be applied to all optical elements that require coupling with optical fibers such as (LD) and photodiode (PD).

  In addition, the same adhesive may be used for bonding and fixing the end face of the optical element and the optical fiber, temporarily fixing and fixing the coating and the optical fiber insertion pipe, and reinforcing and bonding the outer pipe to the optical fiber and the optical fiber insertion pipe. Needless to say, an effective adhesive may be used in an appropriate place.

Sectional drawing and exploded perspective view of the optical element package of the 1st Embodiment of this invention Perspective view of optical fiber insertion pipe Sectional drawing which shows the optical element adhesion process and optical fiber adhesion process of the manufacturing method of the optical element package of this invention Sectional drawing which shows the temporary fix | stop process and sealing process of the manufacturing method of the optical element package of this invention Sectional drawing which shows the outer side pipe adhesion process of the manufacturing method of the optical element package of this invention Sectional drawing which shows the optical fiber adhesion process of the manufacturing method of the optical element package of this invention, and the graph which shows the calculation result of optical fiber coupling angle (theta) The perspective view of the optical fiber penetration pipe of the optical element package of the 2nd Embodiment of this invention The perspective view of the optical fiber penetration pipe of the optical element package of the 3rd Embodiment of this invention Sectional drawing which shows the structure of the optical fiber drawer sealing part of the conventional optical element package

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Optical element package 11 Optical element 12 Case 13 Optical fiber 13b Optical fiber strand 13c Coating | cover 14, 24, 34 Optical fiber penetration pipe 14a, 24a, 34a Cylindrical part 14b, 34c Semi-cylindrical part 16 Outer pipe 24b 1st Semi-cylindrical part 24c Second semi-cylindrical part 34b Slit

Claims (7)

A housing that houses the optical element;
An optical fiber comprising an optical fiber strand portion made of an optical fiber, and an optical fiber coating portion formed by coating the optical fiber strand, and an optical fiber optically coupled to the optical element;
An optical element package that includes an optical fiber insertion pipe that extends from at least one side surface of the casing and allows the optical fiber to pass through the casing;
The optical fiber insertion pipe includes a cylindrical part, and a semi-cylindrical part with a part cut away,
The optical fiber coating portion of the optical fiber is fixed to the optical fiber insertion pipe by the semi-cylindrical portion, and the housing is interposed between the optical fiber strand portion and the cylindrical portion of the optical fiber. An optical element package which is hermetically sealed. 2. The optical element package according to claim 1, wherein a ratio M / L between a total length L of the optical fiber insertion pipe and a length M of the semi-cylindrical portion is 0.5 or more and 0.9 or less. 2. The optical element package according to claim 1, wherein a ratio M / L between a total length L of the optical fiber insertion pipe and a length M of the semi-cylindrical portion is 0.1 or more and less than 0.5. The semi-cylindrical part is
A first semi-cylindrical portion having a first cross-sectional area perpendicular to the axis of the optical fiber insertion pipe;
The optical element package according to claim 1, further comprising: a second semi-cylindrical portion having a second cross-sectional area that is wider than the first cross-sectional area and perpendicular to the axis of the optical fiber insertion pipe. The optical element package according to claim 1, wherein the semi-cylindrical portion has a slit. An optical fiber strand portion comprising an optical fiber strand in an optical fiber insertion pipe extending from at least one side surface of the housing and having a cylindrical portion and a semi-cylindrical half cylindrical portion with a part cut away And an optical fiber provided with an optical fiber coating portion formed by coating the optical fiber strand, and the optical fiber strand portion of the optical fiber and the optical element accommodated in the housing An optical fiber bonding process for bonding;
A temporary fixing step of temporarily fixing the optical fiber coating portion of the optical fiber to the semi-cylindrical portion of the optical fiber insertion pipe;
A sealing step of hermetically sealing the housing between the optical fiber portion of the optical fiber and the cylindrical portion of the optical fiber insertion pipe;
A method of manufacturing an optical element package, comprising: an optical fiber insertion pipe; and an outer pipe bonding step of wrapping and bonding the optical fiber with an outer pipe. The optical element package according to claim 6, wherein the optical fiber bonding step and the temporary fixing step are performed on an optical fiber aligning device, and the sealing step and the outer pipe bonding step are performed outside the optical fiber aligning device. Production method.

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