JP2002207137A - Method for manufacturing optical part and optical part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To adjust a polarization direction with high precision and further to reduce even a manufacturing cost. SOLUTION: Light L1 having a shorter wavelength than the wavelength in use is made incident on an optical fiber 12 from a white light source 54, for example, the optical fiber 12 is relatively rotated to a second array 18 while observing the image of light L2 exited from the end face (the end face of the second array 18 side) of the optical fiber 12, for example, the direction of the major axis of the elliptic spot 70 of an LP01 linear polarizing mode and the arraying direction of two spots in an LP11, linear polarizing mode are matched to the direction of the basic axis for mounting, for example, the horizontal axis 86 displayed on a monitor 62.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for manufacturing an optical component using a polarization maintaining optical fiber and the optical component itself.

[0002]

2. Description of the Related Art Recently, as an optical component using a polarization maintaining optical fiber, for example, an optical component in which an optical waveguide chip and a polarization maintaining optical fiber are connected is known.

This optical waveguide chip includes a GaAs type, I
An oxide film is formed on an nP-based semiconductor chip or Si,
Dielectric (glass) waveguide chip using glass substrate, L
There are many types, such as a ferroelectric crystal waveguide chip made of iNbO ₃ or LiTaO ₃ crystal.

Applications of the above optical components include, for example, sensors and measurement related to optical fiber gyros, optical fiber communication related to high-speed modulators, optical information processing related to A / D converters, laser diode arrays and the like. A wide variety of applications related to light sources and light conversion are being studied.

In the above-mentioned optical parts, an optical fiber array is generally used to connect the optical waveguide chip and the optical fiber. For example, when a polarization maintaining optical fiber is used as an optical fiber, a polarization maintaining optical fiber array is used to connect the optical fiber to an optical waveguide chip while maintaining the polarization plane of the optical fiber in a fixed direction.

A polarization maintaining optical fiber is an optical fiber that can maintain the polarization state of incident light. As shown in FIG. 7, the polarization axis of linearly polarized light is set to the unique axis of the optical fiber 100. When they are incident together, they propagate through the optical fiber 100 while maintaining the polarization state, and can extract linearly polarized light even at the output end.

[0007] In order to obtain a polarization maintaining optical fiber, birefringence (polarization in the X-axis direction and polarization in the Y-axis direction) is imparted to the cross section of the optical fiber 100 by applying different stresses in the orthogonal X-axis direction and Y-axis direction. (A phenomenon in which the refractive index for polarized light is different).

As shown in FIG. 8A, the structure of the polarization maintaining optical fiber is an elliptical cladding type in which a stress applying portion 104 formed around a core 102 has an elliptical shape, or FIG.
As shown in the figure, a PANDA type in which a circular stress applying portion 104 is formed on the left and right with the core 102 as a center,
As shown in FIG. 8C, a Bow-T in which fan-shaped stress applying portions 104 are formed on the left and right with the core 102 as the center, respectively.
In each case, a non-axisymmetric stress applying portion 104 is provided in the cross section of the optical fiber 100. The stress applying unit 104 increases the thermal expansion coefficient by adding, for example, B ₂ O ₃ or the like to the surrounding clad unit 106, and generates a non-axially symmetric residual stress in the core 102 in a cooling process during drawing. It is formed.

On the other hand, the polarization maintaining optical fiber array is composed of, for example, two substrates. A groove is formed in one of the two substrates, and the optical fiber 10 is formed in the groove.
0 is mounted so that its polarization plane is held in a fixed direction, and then the two substrates are overlaid. Thereafter, an adhesive is applied to the gap between the groove and the optical fiber 100 to apply the adhesive to the optical fiber 1.
00 in the groove, the optical fiber 100
To the polarization-maintaining optical fiber array (hereinafter simply referred to as an array) is completed.

[0010]

By the way, when mounting the optical fiber 100 in the groove of the substrate, the optical fiber 100
Is maintained in a fixed direction, that is, the polarization direction is adjusted and mounted.

As the method of adjusting the polarization direction, the following two types of methods have been used. First, the first method is
As shown in FIG. 9, a substrate 112 forming the array 110
A state in which the optical fiber 100 is set in the groove portion (before fixing with an adhesive) (hereinafter simply referred to as a work W) is set in an adjustment jig (not shown). Then, a light source 120 to which a laser diode 116 and an optical fiber 118 are connected, and a light L11 from the light source 120 are used as an incident system 114 for making the light L11 incident on the work W.
Light adjusting means 1 for extracting linearly polarized light in a predetermined direction from
22, a second light adjusting means 126 for extracting linearly polarized light in a predetermined direction from the light L12 from the work W as a detection system 124 for the light L12 emitted from the work W, and the second light adjusting means A light receiving element 128 for receiving the light L12 from 126 and converting it to an electric signal corresponding to the amount of received light is prepared.

The first light adjusting means 122 is, for example, a polarizer 130, a lens 132 for converging the light L11 emitted from the optical fiber 118 of the light source 120 to the polarizer 130, and emitted from the polarizer 130. A lens 134 for converging light to the optical fiber 100 of the work W. On the other hand, the second light adjusting means 126 includes, for example, a polarizer 140 and the optical fiber 100 of the work W.
And a lens 142 for converging the light L12 emitted from the polarizer 140 onto the polarizer 140.

Then, light having the same wavelength as the used wavelength is emitted from the laser diode 116 in the light source 120. At this time, the light L11 from the light source 120 passes through the first light adjusting unit 122, and the light L11 having linear polarization
11 is incident on the workpiece W. At this time, the work W is rotated while rotating the end face of the optical fiber 100.
The intensity of the light L12 emitted from the second light adjusting means 12
The measurement in the light receiving element 128 via 6 is performed to adjust the polarization direction. That is, the optical fiber 100 is fixed to the substrate 112 of the array 110 at a point where the intensity of the light L12 becomes the highest.

Next, as shown in FIG. 10, a CCD camera 150 for taking an image of an end face of the optical fiber 100 set in a groove of a substrate 112 constituting the array 110, A monitor 152 for displaying an image taken at 150 as a video,
The direction of the polarization is adjusted by determining the end face of the optical fiber 100 set on the ten substrates 112, in particular, the direction of the stress applying section 104 by image processing, and adjusting the direction of the stress applying section 104.

However, in the first method described above, although the adjustment accuracy is very high, the position adjustment of each member constituting the incident system 114 and the position adjustment of each member constituting the detection system 124 are complicated, and therefore, In addition, the process tact time increases, and as a result, the manufacturing cost tends to increase.

In the second method, since it is not necessary to make the light L11 incident on the work W, there is no problem that it takes time as in the first method, but it depends on the shape of the stress applying portion 104 of the optical fiber 100. When the stress applying unit 104 is deformed, an error is likely to occur in the image processing, and the direction of the stress applying unit 104 may not completely match the polarization direction. There is a problem with the adjustment accuracy.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and is intended to manufacture an optical component capable of adjusting the polarization direction with high accuracy and reducing the manufacturing cost. It is an object to provide a method and an optical component.

[0018]

According to the present invention, there is provided a method of manufacturing an optical component using a polarization maintaining optical fiber, wherein light having a wavelength shorter than a wavelength used is incident on the optical fiber. The optical component is manufactured by mounting an optical fiber on a component while comparing an image of light emitted from the end face with a basic axis on mounting.

In this case, the light having a wavelength shorter than the working wavelength incident on the optical fiber is a wavelength at which the spot shape of the light emitted from the optical fiber when the light is incident becomes a multimode. Of light.

The optical fiber is a polarization-maintaining optical fiber, the polarization direction of the optical fiber is determined from the image of the light, and the polarization direction is compared with the basic axis on the mounting. An optical fiber may be mounted.

Accordingly, when light having a wavelength shorter than the wavelength used is incident on the optical fiber, the spot shape of the light emitted from the optical fiber becomes multimode, for example, two spots arranged in parallel or an elliptical spot. Becomes

[0022] In this case, the cutoff wavelength is polarization maintaining optical fiber, specifically, and the wavelength of LP ₁₁ mode begins to be excited, other wavelengths each mode begins to be excited of,
It depends on the birefringence axis, that is, the two orthogonal polarization maintaining axes. Therefore, when light having a wavelength slightly shorter than the cutoff wavelength or the wavelength at which each mode starts to be excited, specifically, a light having a wavelength at which the next mode is induced only in one direction of the polarization plane maintaining direction, two light beams are introduced. The spot shapes are different from each other in the polarization plane holding direction, and are, for example, elliptical in one polarization plane holding direction or two parallel spots.

Therefore, the polarization direction of the optical fiber can be easily determined from the multi-mode spot shape without being affected by the deformation of the stress applying portion, etc., and the adjustment of the polarization direction can be performed easily and with high precision. Can be done.

Moreover, when the light is incident on the optical fiber, it is not necessary to consider the polarization direction, so that the light incident system on the optical fiber has a simple configuration, and the detection system is also a CC.
Since a D camera and a monitor are sufficient, the structure is simple and the tact time is greatly reduced.

The comparison between the polarization direction and the basic axis on mounting is performed by image processing, so that the polarization direction can be adjusted more easily and with high accuracy.

Next, in the optical component according to the present invention, light having a wavelength shorter than the wavelength used is incident on the polarization-maintaining optical fiber, and an image of the light emitted from the end face of the optical fiber and a mounting It is configured by mounting an optical fiber while comparing with the basic axis.

Thus, the polarization direction can be adjusted with high accuracy, and the manufacturing cost can be reduced.

[0028]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a method for manufacturing an optical component according to the present invention; FIG.

As shown in FIG. 1, the optical component 1 according to the present embodiment has first and second arrays in which the optical fibers 10 and 12 and the optical waveguide chip 14 are fixed so as to regulate the joining direction. 16 and 18. The optical waveguide chip 14 is formed by forming an optical waveguide (for example, a Y-shaped optical waveguide) 22 having a predetermined shape on, for example, a LiNbO ₃ substrate 20, and a phase modulator 24 and a polarizer 26 are provided on the optical waveguide 22. Are arranged.

As shown in FIG. 1, two ends of an optical fiber 10 (for example, a start end 10a and an end 10b connected to a fiber coil of an optical fiber gyro: see FIG. 2).
Is fixed to a first array 16 that regulates the joining direction with the optical waveguide chip 14, and one end of the optical fiber 12 (for example, the end 12 a of the optical fiber 12 connected to the light source: FIG. 3). ) Are fixed to a second array 18 that regulates the joining direction with the optical waveguide chip 14,
And respective ends 10a and 10b and 12a of the optical fibers 10 and 12 are optically coupled to the optical waveguide chip 14 through the second arrays 16 and 18.

More specifically, as shown in FIG. 2, the first array 16 has two V-shaped grooves (hereinafter, referred to as V grooves) extending on one principal surface toward one end surface. 30a and 30
b and a substrate 16A in which a wide counterbore portion (an escape groove for bonding) 32 extending toward the other end surface is formed continuously.
It is composed of the V-grooves 30a and 30b of the substrate 16A and a lid substrate 16B for closing the counterbore 32. The interval between the two V grooves 30a and 30b is the same as the interval that matches the optical axis of the two branch paths in the optical waveguide 22 shown in FIG.

When assembling the first array 16, first, as shown in FIG. 2, the two ends 10a of the optical fiber 10 are inserted into the V-grooves 30a and 30b of the substrate 16A.
After that, the polarization preserving surface of the optical fiber 10 is adjusted to the direction of the polarization plane of the light propagating through the optical waveguide 22. Thereafter, a cover substrate 16B is placed from above to fill the gap between the V-grooves 30a and 30b and the optical fiber 10 with epoxy resin, and the two are bonded and fixed by heating at an adhesive curing temperature. By fixing the free end side end face 16a of the optical fiber 10 in the end face of the optical fiber 10, the work of fixing the first array 16 to the optical fiber 10 is completed.

The second array 18, as shown in FIG.
One V-shaped groove (hereinafter simply referred to as V-groove) 34 extending toward one end surface of one main surface and a wide counterbore portion (escape groove for bonding) 36 extending toward the other end surface. Are formed continuously, and a lid substrate 18B for closing the V-groove 34 and the countersunk portion 36 of the substrate 18A.

When assembling the second array 18, first, one end 12a of the optical fiber 12 is laid in the V groove 34 of the substrate 18A, and then the optical fiber 1
The two polarization preserving surfaces are aligned with the direction of the polarization plane of the light propagating through the optical waveguide 22. Thereafter, a cover substrate 18B is placed from above and bonded with an adhesive, and the free end side end surface 18a of the optical fiber 12 in the end surface of the second array 18 is polished, thereby forming the second array 18 on the optical fiber 12. Is completed.

In this embodiment, for example, in the second array 18, the polarization direction is adjusted by adjusting the polarization preserving surface of the optical fiber 12 to the direction of the polarization plane of the light propagating through the optical waveguide 22. Do.

That is, as shown in FIG. 4, for example, a state in which the end 12a of the optical fiber 12 is set in the V-groove 34 of the substrate 18A constituting the second array 18 (before fixing with the adhesive). An object (hereinafter simply referred to as a work W) is set on the adjustment jig 50.

A white light source 54 and a lens 56 for converging the light L1 from the white light source 54 to the end face of the optical fiber 12 of the work W are prepared as an incident system 52 for making the light L1 incident on the work W. A CCD camera 60 that captures an image of the end face of the optical fiber 12 set in the second array 18 as a detection system 58 for the light L2 emitted from W
And a monitor 62 for displaying an image captured by the CCD camera 60 as a video. Note that an optical filter is attached to the light emitting surface of the white light source 54.

When the polarization direction is adjusted, light L1 having a wavelength shorter than the wavelength used is incident on the optical fiber 12 from the white light source 54, and the end face of the optical fiber 12 (the side of the second array 18). While observing the image of the light L2 emitted from the end surface of the light source L2 and the basic axis for mounting on the screen 64 of the monitor 62, for example, the optical fiber 12 is rotated relative to the second array 18, The polarization preserving surface of the optical fiber 12 is aligned with the direction of the polarization plane of the light propagating through the optical waveguide 22.

Here, the light L incident on the optical fiber 12
It is preferable that the spot number 1 of the light L2 emitted from the optical fiber 12 when the light L1 is incident includes the light L1 having a wavelength that becomes a multimode.

Here, the light L1 having a wavelength at which the spot shape of the light L2 emitted from the optical fiber 12 is multimode is obtained.
Will be described.

First, as shown in FIG.
Is smaller than 2.405, the optical fiber 1
Single-mode (in this case, LP ₀₁ linear polarization mode) to 2 only propagate. FIG. 6A shows the spot shape in this case.
Shown in

Here, the V number indicates the amount when the electromagnetic field mode is determined by the optical fiber 12, and indicates the characteristic waveguide parameter (characteristic waveguid) of the optical fiber 12.
de parameter) or normalized wave number (normalized wavenumbe)
r), which is represented by the following relational expression.

V number = K _f · a · NA K _f is a wave number in a vacuum and is expressed by 2π / λ, a is the radius of the core, and NA is the numerical aperture of the optical fiber 12.

If the V number is greater than 2.405, the other
Mode can also be propagated. That is, multi-mode
Of light can propagate. Specifically, the number of V is 2.405
In the region spanning ~ 3.832, LP₀₁Linearly polarized light
Mode and LP₁₁The light in the linear polarization mode propagates and the V number is
In a region larger than 3.832, the LP₀₁straight
Linear polarization mode and LP₁₁In addition to linear polarization mode, LP₀₂
Linear polarization mode and LP _{twenty one}Light in linear polarization mode propagates
You.

Looking at the spot shape in each mode,
In FIG. 5, high-order LP _{01 in the} region indicated by oblique line A
In the linear polarization mode, as shown in FIG.
0 shape becomes elliptical, in the region indicated by slanting lines B (LP ₁₁ linear polarization mode), as shown in FIG. 6B, the form of two spots 70a and 70b appeared. In the region indicated by the oblique line C ( _LP02 linear polarization mode), as shown in FIG. 6C, a ring-shaped spot 70d appears around the circular spot 70c. Becomes an ellipse. Further, in the region indicated by oblique lines D (LP ₂₁ linear polarization mode), as shown in FIG. 6D, a shape such as four petal shaped spot 70e~70h was spread evenly.

Since the refractive index distribution around the core in the optical fiber 12 matches the direction (polarization direction) of the polarization preserving surface of the optical fiber 12 due to the stress applying portion in the optical fiber 12, the _LP01 straight line is used. for example, the long axis direction of the elliptical spot 70 in high-order mode polarization mode, the arrangement direction of the two spots 70a and 70b in the LP ₁₁ linear polarization mode (direction connecting the centers of the two spots 70a and 70b)
Will coincide with the polarization direction of the optical fiber 12.

Accordingly, an image of the end face of the optical fiber 12 set in the second array 18 is picked up by the CCD camera 60 and displayed on the monitor 62, thereby forming the image on the substrate 18A as shown in FIG. The image 80 of the V groove 34 and the V
Image 8 of end face of optical fiber 12 fitted in groove 34
2 is projected.

Then, for example, the driving mechanism 84 for rotating the optical fiber 12 relatively to the second array 18 is driven to rotate the optical fiber 12 relatively to the second array 18. , for example, the long axis direction of the elliptical spot 70 in higher mode LP ₀₁ linear polarization mode,
LP ₁₁ fundamental axis on implementing arrangement direction of the two spots 70a and 70b in the linear polarization mode, for example, the substrate 18
The direction of the upper surface of A and the horizontal axis 8 displayed on the monitor 62
Adjust to the direction of 6.

As a result, the polarization preserving surface of the optical fiber 12 matches the direction of the polarization plane of the light propagating through the optical waveguide 22. At this stage, the optical fiber 12 is fixed to the second array 18 by covering the substrate 18A with the lid substrate 18B and bonding them with an adhesive.

As described above, since the axial direction of the spot shape in the multimode coincides with the polarization direction of the optical fiber 12 without depending on the outer shape of the stress applying section, it is not influenced by the deformation of the stress applying section. In addition, the polarization direction of the optical fiber 12 can be easily determined from the multi-mode spot shape, and the polarization direction can be adjusted easily and with high accuracy.

In addition, when the light L1 is incident on the optical fiber 12, it is not necessary to consider the polarization direction thereof, so that the incident system 52 of the light L1 on the optical fiber 12 has a simple configuration, and the detection system 58 Also CCD camera 60 and monitor 62
Therefore, the structure is simple and the tact time is greatly reduced.

In particular, in the present embodiment, the comparison between the polarization direction and the basic axis on mounting is performed by image processing, so that the polarization direction can be adjusted more easily and with high accuracy. It can be carried out.

In the above example, the adjustment of the polarization direction of the optical fiber 12 with respect to the second array 18 has been described.
The present invention can be applied to adjustment of the polarization direction of the optical fiber 10 with respect to the first array 16.

On the other hand, the optical waveguide chip 14 is manufactured as follows. First, an optical waveguide 22 having a predetermined shape is formed on one main surface (functional surface) of, for example, a _3- inch wafer (for example, a LiNbO ₃ substrate) by, for example, vacuum evaporation or the like, and a polarizer 26 and a phase modulator are formed on the optical waveguide 22. Forming a plurality of optical IC patterns on one wafer (not shown).

Next, the optical IC patterns are cut out from the wafer in sets by using, for example, a dicing apparatus having a diamond cutter, and then the end faces of each set, especially the first and second optical IC patterns, are cut out. Array 1 of 2
The surface where 6 and 18 are joined is polished.

Thereafter, each optical IC pattern is cut from each group by using the same dicing apparatus to separate it into a number of optical waveguide chips, and one optical waveguide chip 14 which is individually separated is obtained (see FIG. 1). ).

Then, the first and second arrays 16 and 18 to which the optical fibers 10 and 12 have already been fixed are bonded to one optical waveguide chip 14, respectively. Of the two end faces of the optical waveguide chip 14, the second array 18 is joined to the end face near the polarizer 26, and the first array 16 is joined to the end face near the phase modulator 24 with their optical axes aligned. In joining the arrays 16 and 18, bonding with an adhesive is performed while adjusting the optical axis so that the light output is the strongest.

More specifically, first, the second array 18 is bonded to one end face of the optical waveguide chip 14 with, for example, an adhesive. At this time, a light source is provided on the open end side of the optical fiber 12, while a photodetector (not shown) is provided on the other end side of the optical waveguide 22, and the light is output through two branch paths of the optical waveguide 22. While the light from the light source to be measured is measured by the photodetector, the polarization maintaining surface of the optical fiber 12 is
In FIG. 1, the optical axis is adjusted in three directions orthogonal to XYZ in FIG. When the optical axis adjustment is completed, the second array 18 and the optical waveguide chip 1
4 are joined by an adhesive.

The second array 18 and the optical waveguide chip 1
When the bonding with the optical waveguide chip 14 is completed,
The first array 16 is adhered to the other end surface of the first member by, for example, an adhesive. At this time, while measuring the light from the light source propagated through the optical waveguide 22 with a photodetector (not shown), the polarization preserving surface of the optical fiber 10 coincides with the polarization direction of the optical waveguide 22. In FIG. 1, the adjustment is performed for the three orthogonal XYZ directions and the rotation direction of the two cores (starting end 10 a and end 10 b) of the optical fiber 10 to adjust the respective end surfaces of the optical waveguide 22 and the end 10 a of the optical fiber 10. 10b so that the amount of light transmitted therethrough is maximized. After the adjustment, the first array 16 and the optical waveguide chip 14
Are bonded by an adhesive. Thereby, the optical component 1 according to the present embodiment is completed.

It should be noted that the optical component manufacturing method and the optical component according to the present invention are not limited to the above-described embodiment, but may adopt various configurations without departing from the gist of the present invention.

[0061]

As described above, according to the method for manufacturing an optical component and the optical component according to the present invention, the polarization direction can be adjusted with high accuracy, and the manufacturing cost can be reduced. be able to.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an optical component according to an embodiment.

FIG. 2 is an exploded perspective view showing a state in which an optical fiber whose end is branched is fixed to an optical fiber array.

FIG. 3 is an exploded perspective view showing a state in which an optical fiber having one end is fixed to an optical fiber array.

FIG. 4 is a configuration diagram showing a polarization adjustment method according to the present embodiment.

FIG. 5 is a characteristic diagram showing a low-order linear polarization mode propagating through an optical fiber.

6A is an explanatory diagram showing a spot shape in the LP ₀₁ linearly polarized light mode, Fig. 6B is an explanatory diagram showing a spot shape in the LP ₁₁ linearly polarized light mode, Fig. 6C is LP ₀₂
It is an explanatory diagram showing a spot shape in the linear polarization mode,
Figure 6D is an explanatory diagram showing a spot shape at LP ₂₁ linear polarization mode.

FIG. 7 is an explanatory diagram illustrating a configuration of a polarization maintaining optical fiber.

8A is a sectional view showing an elliptical cladding type polarization maintaining optical fiber, FIG. 8B is a sectional view showing a PANDA type polarization maintaining optical fiber, and FIG. 8C is Bow-
It is sectional drawing which shows a Tie type polarization maintaining optical fiber.

FIG. 9 is a configuration diagram showing a first method in the related art.

FIG. 10 is a configuration diagram showing a second conventional method.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Optical components 10, 12 ... Optical fiber 14 ... Optical waveguide chip 16 ... First array 18 ... Second array 52 ... Incident system 54 ... White light source 58 ... Detection system 60 ... CCD camera 62 ... Monitor 70, 70a- 70h: Spot 86: Horizontal axis W: Work

Continuation of the front page (72) Inventor Ryoichi Hata 2-56, Suda-cho, Mizuho-ku, Nagoya-shi, Aichi Japan Insulator Co., Ltd. F term (reference) 2H036 JA03 LA03 NA03 NA08 NA12 NA17

Claims (5)

[Claims] 1. A method of manufacturing an optical component using a polarization-maintaining optical fiber, wherein light having a wavelength shorter than a wavelength used is incident on the optical fiber, and an image of light emitted from an end face of the optical fiber is provided. Manufacturing an optical component by mounting an optical fiber while comparing the optical component with a basic axis for mounting. 2. The method of manufacturing an optical component according to claim 1, wherein light having a wavelength shorter than the working wavelength incident on the optical fiber is emitted from the optical fiber when the light is incident. A method for manufacturing an optical component, wherein a spot shape of light includes light having a wavelength that is multimode. 3. The method for manufacturing an optical component according to claim 1, wherein the optical fiber is a polarization-maintaining optical fiber, and a polarization direction of the optical fiber is determined from an image of the light, and the polarization direction is determined. A method of manufacturing an optical component, comprising mounting the optical fiber while comparing a direction with a basic axis on the mounting. 4. The method for manufacturing an optical component according to claim 3, wherein the comparison between the polarization direction and the basic axis on the mounting is performed by image processing. 5. An optical component using an optical fiber, wherein light having a wavelength shorter than a wavelength used is incident on the optical fiber, and an image of light emitted from an end face of the optical fiber and a basic axis on mounting are provided. An optical component comprising an optical fiber mounted while comparing the above.