JPH11167043A - Optical wavguide component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide constitution which precisely positions and adjusts a thin- film optical filter in a cut groove of an optical waveguide and easily couples and assembles the optical waveguide and an optical fiber. SOLUTION: This component consists of a waveguide substrate 11 which has an optical waveguide 16 coupled with optical fibers 18 and 19 and also has the cut groove 17 formed across the optical waveguide 16, an array member 22 which holds end parts of the optical fibers 18 and 19, and a fitting block 25 where the thin-film optical filter 24 having its tip part inserted into the cut groove 17 is fixed and which is arranged in contact with both the waveguide substrate 11 and array member 22; and the thin-film optical filter 24 can precisely be positioned and adjusted, optical waveguides 14 and 15 and optical fibers 18 and 19 are easily coupled and adjusted to greatly shorten the assembly time, and further the waveguide substrate 11 and array member can be fixed tightly.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical waveguide component used for optical fiber communication in which communication is performed using an optical fiber.

[0002]

2. Description of the Related Art In recent years, with the expansion of optical fiber communication networks,
For the purpose of integration and cost reduction of optical communication components, introduction of optical waveguide components having an optical demultiplexing function in which a thin film optical filter is inserted into a waveguide substrate has been advanced.

An optical waveguide component having an optical demultiplexing function has a thickness of about 15 to 30 μm in a cutting groove traversing the optical waveguide.
For example, light having a wavelength of 1.5 μm that has propagated in the optical waveguide is reflected by the thin film optical filter, and light having a wavelength of 1.3 μm passes through the filter and is separately formed. Therefore, the position accuracy of the thin-film optical filter that crosses the optical waveguide is very important.

However, the width of the cut groove crossing the optical waveguide wave is larger than the thickness of the thin film optical filter, and since this cut groove is generally processed by a dicing saw, the width of the entrance is smaller than the width of the cut groove. Tend to be wider. For this reason, there has been a problem that much time is required for an assembling operation such as providing the thin film optical filter perpendicular to the optical axis of the optical waveguide or adjusting the position of the thin film optical filter accurately in the cut groove.

[0005] As a device which has improved such a disadvantage, for example, a device described in JP-A-9-159855 is known.

In the above publication, as shown in FIGS. 8A and 8B, an optical waveguide 2 is provided on the upper surface of a waveguide substrate 1.
The cutting groove 4 is cut so as to traverse the groove, and the thin film optical filter 3 is inserted into the cutting groove 4.
A buckling load is applied from the upper end of the thin film optical filter 3 via the arm 5 and the position in the cut groove 4 is adjusted by the deformation of the thin film optical filter 3. Since the adjustment can be performed well and the assembling adjustment time can be shortened, there are advantages such as high productivity.

[0007]

However, in the optical waveguide component disclosed in the above publication, a buckling load is applied to the thin-film optical filter and the thin-film optical filter is fixed. , There is a possibility that optical characteristics such as wavelength characteristics and polarization characteristics of the thin film optical filter may change from the design values.

In the case of optical waveguide components used for optical fiber communication, the coupling between the optical fiber and the optical waveguide is indispensable. Even if the assembly is completed in a short time, there is a problem that much time is required for connection with the optical fiber.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional disadvantages, and can adjust the position of a thin-film optical filter accurately in a cut groove of an optical waveguide without applying a load to the thin-film optical filter. It is an object of the present invention to provide an optical waveguide component having an optical demultiplexing function that enables easy coupling between the optical waveguide and an optical fiber.

[0010]

According to the present invention, in order to achieve the above object, a thin film optical filter is fixed to a mounting block, and the tip of the thin film optical filter is provided in a direction crossing the optical waveguide on the waveguide substrate. With the mounting block and the waveguide substrate being in contact with each other while being inserted into the cutting groove, the alignment member holding the optical fiber to be coupled to the end face of the optical waveguide is fixed to each other so that the mounting block is in contact with the alignment member. By doing so, it constitutes an optical waveguide component having an optical demultiplexing function, and it is possible to accurately adjust the position without applying a load to the thin film optical filter and arrange the mounting block so as to be in contact with the alignment member of the optical fiber. Therefore, the bonding surface when fixing the alignment member is widened, whereby an optical waveguide component having a strong structure can be provided.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is directed to a waveguide substrate having an optical waveguide coupled to an optical fiber and having a cut groove formed so as to cross the optical waveguide. An alignment member holding an end of an optical fiber coupled to an optical waveguide, a thin film optical filter for inserting a tip into the cut groove are fixed, and are arranged so as to be in contact with both the waveguide substrate and the alignment member. And a mounting block.

According to the above configuration, since the mounting block to which the thin-film optical filter is fixed is arranged in contact with the waveguide substrate, the position of the thin-film optical filter can be precisely adjusted in the cut groove. In addition, since the mounting block is arranged so as to be in contact with the alignment member of the optical fiber, the position adjustment between the optical waveguide and the optical fiber is easy, and the waveguide substrate and the alignment member can be firmly fixed.

According to a second aspect of the present invention, there is provided a waveguide substrate having an optical waveguide coupled to an optical fiber, wherein a cut groove is formed so as to cross the optical waveguide, and a tip in the cut groove. A holding portion to which the thin film optical filter for inserting the portion is fixed, and a fiber attachment portion in which the ends of the optical fibers coupled to the optical waveguide are aligned or held, are integrally formed,
And a mounting block arranged so that at least one surface thereof is in contact with the waveguide substrate.

According to the above construction, the mounting block holding the thin-film optical filter and the optical fiber is disposed in contact with the waveguide substrate, so that the position of the thin-film optical filter can be adjusted and fixed in the cut groove, and the optical waveguide and the optical fiber can be adjusted. Can be performed at the same time, and the assembling time of the optical waveguide component can be greatly reduced.

According to a third aspect of the present invention, a V-groove for aligning optical fibers is formed on a mounting block.

According to the above configuration, members requiring high dimensional accuracy for holding the thin-film optical filter and the optical fiber can be concentrated on one member, so that the processing cost and the material cost can be reduced.

According to a fourth aspect of the present invention, an optical fiber is aligned with a V-groove provided in a waveguide substrate, and a fiber mounting portion of a mounting block is arranged so as to contact the optical fiber.

According to the above configuration, the V-groove is formed on the waveguide substrate with high precision in correspondence with the position of the optical waveguide.
It is not necessary to adjust the position of the optical fiber and the optical waveguide, and the productivity is improved.

According to a fifth aspect of the present invention, the notch or slit provided in the mounting block is a holding portion for fixing the thin-film optical filter.

With the above configuration, the mounting position of the thin-film optical filter can be regulated by the notch or the slit, so that a high positional accuracy with respect to the optical waveguide can be obtained.

According to a sixth aspect of the present invention, a single mounting block is provided with a plurality of thin-film optical filters and a plurality of holding portions for fixing the thin-film optical filters.

According to the above configuration, when a plurality of thin film optical filters are fixed to the respective cutting grooves, one mounting block may be adjusted in position with respect to the waveguide substrate, and the assembly is greatly simplified. realizable.

According to a seventh aspect of the present invention, a concave portion for storing an adhesive is provided near a holding portion for fixing the thin-film optical filter to the mounting block.

With the above configuration, the adhesive for fixing the thin-film optical filter is prevented from adhering to the end face of the mounting block in contact with the waveguide substrate, so that the waveguide substrate and the mounting block are accurately contacted and arranged. can do.

According to the invention described in claim 8 of the present invention, the surface where the mounting block and the waveguide substrate or the alignment member are in contact with each other,
A plurality of concave portions and convex portions are respectively formed, and the concave portions and convex portions are fitted to each other, whereby the mounting block and the waveguide substrate or the alignment member are aligned.

According to the above-described structure, the positioning between the mounting block and the waveguide substrate or the alignment member can be realized without performing fine position adjustment only by accurately fitting the concave portion and the convex portion. Can improve productivity.

According to a ninth aspect of the present invention, the mounting block is formed of a material having substantially the same coefficient of thermal expansion as the waveguide substrate or the alignment member.

With the above configuration, even if a temperature change is applied,
Since the expansion coefficients are equal, there is no shift in the relative position between the mounting block and the waveguide substrate or the alignment member, and a highly reliable optical waveguide component can be provided.

According to a tenth aspect of the present invention, the mounting block is made of a press-formed product made of glass or resin.

According to the above configuration, a mounting block having high optical and material affinity with a glass or resin waveguide substrate and excellent mass productivity by press molding can be obtained.

According to an eleventh aspect of the present invention, there is provided a thin film optical filter for guiding reflected light reflected by a thin film optical filter into a mounting block, and extracting the reflected light from an arbitrary end surface of the mounting block. Are arranged obliquely with respect to the optical axis of the optical waveguide.

According to the above configuration, the inclined portion for fixing the thin-film optical filter and the portion for extracting the reflected light are arranged in the same mounting block, so that the light propagating through the optical waveguide can be transmitted with a simple configuration. It can be easily taken out.

According to a twelfth aspect of the present invention, a condenser lens is provided on an end face of a mounting block for extracting reflected light, and the condenser lens and the mounting block are integrally formed.

According to the above configuration, the reflected light can be condensed and efficiently coupled to, for example, a light receiving element, and the condensing lens and the mounting block are integrally formed, so that the size of the optical waveguide component can be reduced.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings shown in FIGS.

In FIGS. 1 to 7, the same reference numerals denote the same parts, and a duplicate description will be omitted in the description of each drawing.

FIG. 1 is a diagram showing the structure of an optical waveguide component according to a first embodiment of the present invention.
A waveguide substrate having a waveguide layer 13 formed on a substrate 12;
4, 15 and 16 have a width of about 7 μm formed in the waveguide layer 13.
And arranged in a Y-branch structure. Reference numeral 17 denotes a cut groove having a width of about 30 μm and a depth of about 100 μm, which is provided in a direction crossing the vicinity of the intersection of the optical waveguides 14, 15, and 16.
8, 19 are optical fibers coupled to the tips 20, 21 of the optical waveguides 14, 15, and 22 and 23 are optical fibers 1 between them.
It is an alignment member that holds it between 8, 19. Reference numeral 24 denotes a thin film optical filter having a thickness of about 15 μm, which reflects light having a wavelength of 1.5 μm and transmits light having a wavelength of 1.3 μm.
Reference numeral 5 denotes a mounting block for fixing the thin film optical filter 24 to the holding portion 26. The lower end of the thin film optical filter 24 is inserted into the cutting groove 17 from above, and propagates through the optical waveguide 14 to the thin film optical filter 24. Of the incident light, light having a wavelength of 1.5 μm is reflected and coupled to the optical waveguide 15, and light having a wavelength of 1.3 μm is transmitted and coupled to the optical waveguide 16. The lower surface 27 and the end surface 28 of the mounting block 25 are respectively aligned with the upper surface 29 of the waveguide substrate 11 and the alignment member 2.
2 and is fixed in contact with the end face 30.

According to the configuration of the first embodiment, since the mounting block 25 to which the thin-film optical filter 24 is fixed is disposed in contact with the upper surface 29 of the waveguide substrate 11, the thin-film optical filter 24 is Can be adjusted with high accuracy,
An excellent optical waveguide component having an optical demultiplexing function can be obtained. Further, since the mounting block 25 is disposed so as to be in contact with the alignment member 22 of the optical fibers 18 and 19, the positions of the optical waveguides 20, 19 and the optical fibers 18, 19 can be easily adjusted. Substrate 11 and alignment member 22,
23 can be firmly fixed.

Although the description of the tip of the optical waveguide 16 is omitted here, any member such as another optical fiber or a light receiving / emitting element may be connected to the tip. Furthermore, although the description has been made using the Y-branch optical waveguide, it goes without saying that a multi-branch structure or any other waveguide structure may be used.

FIG. 2 is a diagram showing the configuration of an optical waveguide component according to a second embodiment of the present invention.
Reference numeral 1 denotes a mounting block in which a holding portion 26 for fixing the thin-film optical filter 24 and a fiber mounting portion 33 are integrally formed.
The optical fibers 18 and 19 are aligned and held between the fiber attachment portion 33 and the alignment member 32. This mounting block 3
An optical waveguide component is constructed by assembling at least one of the lower surface 27 or the end surface 34 of the first substrate 1 so as to be in contact with the upper surface 29 or the end surface 35 of the waveguide substrate 11.

According to the configuration of the second embodiment, the mounting block 31 holding the thin-film optical filter 24 and the optical fibers 18 and 19 is fixed to the waveguide substrate 11 with at least one surface in contact. The position adjustment and fixing of the thin-film optical filter 24 in the cut groove 17 and the optical coupling between the optical waveguides 14 and 15 and the optical fibers 18 and 19 can be performed at the same time, and the assembling time of the optical waveguide components can be greatly reduced. The effect is obtained.

In this embodiment, the mounting block 3
At least one of the lower surface 27 or the end surface 34 of the first substrate 1 is assembled in contact with the waveguide substrate 11, but the position where the mounting block 31 and the waveguide substrate 11 are in contact is not particularly limited.

FIG. 3 is a view showing the construction of a mounting block 31 of an optical waveguide component according to a third embodiment of the present invention, in which precision processing for aligning the optical fibers 18 and 19 on a fiber mounting portion 33 is performed. The mounting block 31 of the optical waveguide component shown in FIG.
It is what constituted.

With the above configuration, the holding section 26 for holding the thin film optical filter 24, both of which require high dimensional accuracy.
And the V-groove 36 holding the optical fibers 18 and 19 can be formed as a single member by precision processing, so that the processing cost and material cost can be reduced. In addition, since the thin-film optical filter 24 and the optical fibers 18 and 19 are held by one mounting block 31, an effect of simplifying the assembly of the optical waveguide component can be obtained.

FIG. 4 is a view showing the configuration of an optical waveguide component according to a fourth embodiment of the present invention. A precision processed V-groove 37 is formed on a waveguide substrate 11 provided with a cutting groove 17.
The optical fibers 18 and 19 are aligned in the V groove 37. After the position of the thin-film optical filter 24 is precisely adjusted in the cutting groove 17, the fiber mounting surface 32 of the mounting block 31 is adjusted.
Are fixed to the waveguide substrate 11 so that the optical fibers 18 and 19 are in contact with each other to form an optical waveguide component.

With the above structure, the V-groove 37 is formed in the optical waveguide 1
Since it is formed on the waveguide substrate 11 with high accuracy corresponding to the positions of 4 and 15, the position adjustment between the optical fibers 18 and 19 and the optical waveguides 14 and 15 becomes unnecessary, and the productivity of optical waveguide components is reduced. Further enhanced effects are obtained.

FIG. 5 is a view showing the configuration of an optical waveguide component according to a fifth embodiment of the present invention. In the fifth embodiment, the holding portion 26 of the thin-film optical filter 24 shown in FIG. A notch 38 and a slit 39 are provided in the mounting block 25, and the thin film optical filters 24, 4
0 is inserted and then fixed using adhesives 41 and 42, respectively.

According to the above configuration, the displacement of the mounting positions of the thin film optical filters 24 and 40 can be regulated by the dimensional accuracy of the cutout portion 38 and the slit portion 39, respectively, so that a high positional accuracy with respect to the optical waveguide can be obtained. Notch 3
The thin film optical filters 24 and 40 can be firmly fixed by filling the adhesives 41 and 42 in the slits 8 or the slit portions 39.

In the fifth embodiment, a plurality of thin film optical filters 24 and 40 and a plurality of holding portions 38 and 39 for fixing the same are provided in a single mounting block 25. When the thin film optical filters 24 and 40 are fixed in the respective cutting grooves 17 on the waveguide substrate 11,
What is necessary is just to arrange and arrange one mounting block 25 with respect to the waveguide board 11, and the effect that the simplification of assembling can be realized is obtained.

Further, in the fifth embodiment, each of the thin-film optical filters 24, 4
0 is fixed to the holding portion 26 of the mounting block 25,
Since the concave portions 43 and 44 for storing the adhesive overflowing during bonding are provided, excess adhesive generated when the thin film optical filters 24 and 40 are fixed is removed from the surface 2 of the waveguide substrate 11.
Since the flow is prevented from flowing into the lower surface 27 of the mounting block 25 in contact with the mounting block 9, the effect that the waveguide substrate 11 and the mounting block 25 can be accurately contacted and arranged can be obtained.

FIG. 6 is a view showing the configuration of an optical waveguide component according to a sixth embodiment of the present invention.
The lower surface 27 of the mounting substrate 25 and the upper surface 29 of the waveguide substrate 11 contact each other, or the end surface 28 of the mounting block 25 and the alignment member 2
A plurality of convex portions 45 are provided on the surface where the end surfaces 30
And the concave portion 46 are formed, and the mounting block 25 and the waveguide substrate 11 and the mounting block 25 and the alignment member 22 are aligned with each other by fitting the convex portion 45 and the concave portion 46. is there.

With the above configuration, the positioning between the mounting block 25 and the waveguide substrate 11 or the alignment member 22 can be realized without performing fine position adjustment only by accurately fitting the convex portion 45 and the concave portion 46. Therefore, it is possible to obtain an effect that the assembling is easy and the productivity can be improved.

The mounting block 25 is connected to the waveguide substrate 1.
1 or a material having substantially the same coefficient of thermal expansion as the alignment members 22 and 23, even if the temperature changes, the relative position between the mounting block 25 and the waveguide substrate 11 or the alignment members 22 and 23 is shifted. Since it does not occur, a highly reliable optical waveguide component can be provided.

Further, if the mounting block 25 is formed by press molding using glass or resin as a material, the optical and material affinity with the glass or resin waveguide substrate 11 is increased, and the mounting block 25 is formed by press molding. An optical waveguide component excellent in mass productivity can be obtained.

FIG. 7 is a view showing the configuration of an optical waveguide component according to a seventh embodiment of the present invention. In the seventh embodiment, the thin film optical filter 24 is inclined with respect to the optical waveguide 14. The reflected light 48 reflected by the thin-film optical filter 24 among the propagating light 47 incident on the optical waveguide 14
The optical waveguide component is configured so that the light enters from the lower surface 27 of the mounting block 31 and exits from the upper surface 49 of the mounting block 31.

According to the above configuration, the inclined portion 50 for fixing the thin-film optical filter 24, the lower surface 27 for inputting and outputting the reflected light 48, and the upper surface 49 are formed in the same mounting block 31, so that the light guide can be formed with a simple configuration. The effect that the propagation light 47 of the wave path 14 can be easily taken out of the waveguide substrate 11 is obtained.

In the seventh embodiment of the present invention, a condensing lens 51 for condensing the reflected light 48 emitted is provided on the upper surface 49 of the mounting block 31, and the light is condensed by the condensing lens 51. The condenser lens 51 and the mounting block 31 are integrally formed by, for example, press molding, while being arranged so that light is coupled to the light receiving element 52.

According to the above configuration, the reflected light 48 can be efficiently coupled to the light receiving element 52, and at the same time, the condensing lens 51 and the mounting block 31 for fixing the thin film optical filter 24 are integrally formed, so that the assembly is easy. Thus, an effect that the productivity is high and the size of the optical waveguide component can be reduced can be obtained.

Although the seventh embodiment has been described using a spherical lens as the condenser lens 51, any lens that condenses light may be an aspheric lens, a Fresnel lens, a refractive index distribution lens, or the like. Anything may be used. Further, the light condensed on the light receiving element 52 is coupled, but the optical member coupled before the condenser lens 51 is not particularly limited.

[0060]

According to the present invention, as described in detail above, the mounting block to which the thin film optical filter is fixed is arranged in contact with the waveguide substrate and the optical fiber alignment member. The position of the filter can be adjusted with high accuracy and the filter can be attached. The position of the optical waveguide and the optical fiber can be easily adjusted, and the waveguide substrate and the alignment member can be firmly fixed.

Further, since the thin film optical filter and the optical fiber are held in the mounting block and are arranged in contact with the waveguide substrate, the position adjustment and fixing of the thin film optical filter in the cut groove, the light guide, and the like can be achieved. Since the optical path and the optical fiber can be simultaneously coupled, the assembling time can be greatly reduced.

Further, by forming the V-groove for aligning the optical fibers on the mounting block for fixing the thin-film optical filter, members requiring high dimensional accuracy can be integrated into one, so that the processing cost and the material cost are reduced. The reduction can be achieved.

Further, since the V-groove for aligning the optical fibers is formed on the waveguide substrate with high precision corresponding to the position of the optical waveguide, the position adjustment between the optical fiber and the optical waveguide becomes unnecessary. By improving the productivity and fixing the thin-film optical filter to the slit and notch provided in the mounting block, a high positional accuracy of the thin-film optical filter with respect to the optical waveguide can be obtained, and the inside of the slit and notch can be obtained. In addition, the thin film optical filter can be firmly fixed.

Further, even when a plurality of thin film optical filters are fixed on a waveguide substrate, the assembly is greatly simplified by providing a plurality of thin film optical filters and a holding portion on a single mounting block. And a recess that stores excess adhesive when bonding the thin-film optical filter.
By providing the mounting block on the mounting block, it is possible to prevent the adhesive from adhering to the mounting block end face, so that the waveguide substrate and the mounting block can be arranged in accurate contact with each other.

Further, a plurality of concave portions and convex portions are formed on the surfaces of the mounting block and the waveguide substrate or the alignment member which are in contact with each other, and the concave portions and the convex portions are fitted to each other with high precision, thereby forming Since the alignment with the waveguide substrate or the alignment member can be performed, the assembly is easy, the production yield can be improved, and the inclined portion for fixing the thin film optical filter obliquely, and the portion for extracting the reflected light from the thin film optical filter. Are arranged in the same mounting block, the propagation light in the optical waveguide can be easily taken out of the waveguide substrate.

Moreover, a condensing lens is provided on the surface of the mounting block to efficiently couple the reflected light to a light receiving element and the like, and downsizing can be realized by integrally forming the condensing lens and the mounting block. Is obtained, and an optical waveguide component having an excellent light demultiplexing function as compared with the related art can be provided.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an optical waveguide component according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram of an optical waveguide component according to a second embodiment of the present invention.

FIG. 3 is a configuration diagram of a mounting block portion of an optical waveguide component according to a third embodiment of the present invention.

FIG. 4 is a configuration diagram of an optical waveguide component according to a fourth embodiment of the present invention.

FIG. 5 is a configuration diagram of an optical waveguide component according to a fifth embodiment of the present invention.

FIG. 6 is a configuration diagram of an optical waveguide component according to a sixth embodiment of the present invention.

FIG. 7 is a configuration diagram of an optical waveguide component according to a seventh embodiment of the present invention.

8A and 8B are cross-sectional views illustrating a configuration of a conventional optical waveguide component.

[Explanation of symbols]

 Reference Signs List 11 waveguide substrate 12 Si substrate 13 waveguide layer 14, 15, 16 optical waveguide 17 cutting groove 18, 19 optical fiber 20, 21 tip of optical waveguide 22, 23, 32 alignment member 24, 40 thin film optical filter 25, 31 mounting Block 26 Holder 27 Lower surface of mounting block 28, 34 End surface of mounting block 29 Upper surface of waveguide substrate 30 End surface of alignment member 33 Fiber mounting portion 35 End surface of waveguide substrate 36, 37 V-groove 38 Notch 39 Slit 41 42, adhesive 43, 44 concave portion 45 convex portion 46 concave portion 47 propagated light 48 reflected light 50 inclined portion 51 condensing lens 52 light receiving element

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI H04B 10/12

Claims (12)

[Claims] An optical waveguide coupled to the optical fiber;
A waveguide substrate having a cut groove formed so as to cross the optical waveguide, an alignment member holding an end of an optical fiber coupled to the optical waveguide, and a thin film optical filter for inserting a tip into the cut groove. An optical waveguide component, comprising: a mounting block fixed and arranged so as to be in contact with both the waveguide substrate and the alignment member. 2. An optical waveguide coupled to an optical fiber,
A waveguide substrate in which a cut groove is formed so as to cross the optical waveguide, a holding portion to which a thin film optical filter for inserting a tip into the cut groove is fixed, and an end portion of an optical fiber coupled to the optical waveguide Are integrally formed, and at least one fiber mounting portion is formed on the waveguide substrate.
An optical waveguide component comprising: a mounting block disposed so that two surfaces thereof are in contact with each other. 3. The optical waveguide component according to claim 2, wherein a V-groove for aligning the optical fibers is formed on the mounting block. 4. The optical waveguide component according to claim 2, wherein the optical fiber is aligned with a V-groove provided in the waveguide substrate, and the fiber mounting portion of the mounting block is arranged to be in contact with the optical fiber. 5. The optical waveguide component according to claim 1, wherein the notch or the slit provided in the mounting block serves as a holding portion for fixing the thin-film optical filter. 6. The optical waveguide component according to claim 1, wherein a single mounting block is provided with a plurality of thin film optical filters and a plurality of holding portions for fixing the thin film optical filters. 7. The optical waveguide component according to claim 1, wherein a concave portion for storing an adhesive is provided near a holding portion for fixing the thin-film optical filter to the mounting block. 8. A plurality of concave portions and convex portions are respectively formed on a surface where the mounting block and the waveguide substrate or the alignment member are in contact with each other, and the concave portion and the convex portion are fitted to each other to thereby form a connection between the mounting block and the alignment member. 3. The optical waveguide component according to claim 1, wherein the positioning of the waveguide substrate or the alignment member is performed. 9. The optical waveguide component according to claim 1, wherein the mounting block is formed of a material having substantially the same coefficient of thermal expansion as the waveguide substrate or the alignment member. 10. The optical waveguide component according to claim 1, wherein the mounting block is made of a press-formed product made of glass or resin. 11. The thin-film optical filter is inclined with respect to the optical axis of the optical waveguide so that the reflected light reflected by the thin-film optical filter is guided into a mounting block, and the reflected light is extracted from an arbitrary end surface of the mounting block. Claim 1.
Alternatively, the optical waveguide component according to claim 2. 12. The optical waveguide component according to claim 11, wherein a condenser lens is provided on an end face of the mounting block for extracting the reflected light, and the condenser lens and the mounting block are integrally formed.