JPH0659168A - Optical array link module - Google Patents

Abstract

PURPOSE:To reduce the cost of the optical array link module which transmits plural light signals in parallel. CONSTITUTION:This optical array module is equipped with an LD array 4 constituted by successively providing plural LDs 4A while the number of defectives is considered in the necessary number of channels, an optical fiber array cable 6 constituted by successively providing optical fibers 6A corresponding to the respective LDs 4A of the LD array 4, and a lens array 5 which is constituted by successively providing lenses 5A corresponding to the respective LDs 4A of the LD array 4 and interposed between the LD array and optical fiber cable 6 to optically couple the LD array 4 and optical fiber array cable 6 as desired; and optical fibers of the optical fiber cable 6 corresponding to defective LDs of the LD array 4 are disconnected as desired and then optical fibers 6A as many as desired channels are arrayed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical array link module for transmitting a plurality of optical signals in parallel.

An optical array link module in which an electric / optical conversion element array and an optical fiber array are optically coupled is used in a network between optical communication systems and a wide band ISD (Integrated Servi).
cesDegital Network) Practical application is desired as an in-device interface.

At this time, in order to transmit an optical signal at high speed,
A semiconductor laser (hereinafter abbreviated as LD) is used as the electro-optical conversion element. On the other hand, as the LD array, one in which LDs, the number of which is equal to the number of channels for optically transmitting, are arranged in a horizontal row on an elongated wafer are widely used.

[0004]

2. Description of the Related Art A conventional optical array link module is shown in FIG.
Shown in. In the figure, 2 is a number of input terminals equal to the required number of channels, 300 is a driving circuit equal to the required number of channels driven by the input electric signals from the respective input terminals 2, and formed in parallel on a substrate (not shown). This is an LD drive circuit array that is formed.

[0005] 400 is the number of L equal to the required number of channels
LD array in which D is arranged in a horizontal row at equal pitch, 500 is L
This is a lens array in which a number of lenses equal to the required number of channels are arranged at a pitch equal to the arrangement pitch of LDs of the D array 400.

Reference numeral 600 denotes an optical fiber array cable in which a number of optical fibers equal in number to the required number of channels are arranged at a pitch equal to the arrangement pitch of the lenses of the lens array 500. I am wearing 7.

The input terminal 2, the LD drive circuit array 300, the LD array 400, the lens array 500 and the optical fiber array cable 600 as described above are arranged on the base 1 in this order.

The optical axes of the LD array 400, the lens array 500, and the optical fiber array cable 600 are the same, and the LD drive circuit array 300 and the LD drive circuit respectively
It is connected to the corresponding LD of the array 400 via a connecting line.

[0009]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
The number of LDs, which is equal to the number of channels for optical transmission, that is, the required number of channels, is formed in a row on a long and narrow wafer. On the other hand, it is very difficult to manufacture an LD array so that all LDs satisfy the characteristics.

Therefore, there is a high probability that a defective LD exists in the arranged LDs. Therefore, even if there is one defective LD, the LD array cannot be adopted in the optical array link module having the required number of channels.
Another new LD array was manufactured and incorporated into the optical array link module.

That is, the conventional optical array link module has a problem that the cost is high due to the low yield of the LD array. The present invention has been made in view of the above points, and an object thereof is to provide a low-cost optical array link module.

[0012]

In order to achieve the above-mentioned object, the present invention is an LD in which a plurality of LDs 4A, each of which has an expected number of defects with respect to the required number of channels, are arranged in series, as illustrated in FIG. An optical fiber array cable 6 in which the number of optical fibers 6A corresponding to the required number of channels and the number of defective LDs corresponding to the array 4 and the respective LDs 4A of the LD array 4 are consecutively arranged on the same plane. Have.

Corresponding to the respective LDs 4A of the LD array 4, a number of lenses 5A corresponding to the required number of channels, the number of which includes the number of defective LDs, are continuously arranged on the same plane, and the LD array 4 and the optical fiber array are arranged. LD between the cables 6
It has a lens array 5 for optically coupling the array 4 and the optical fiber array cable 6 as desired.

Then, the optical fiber array cable 6
It is assumed that the optical fiber corresponding to the defective LD of the LD array 4 is cut as desired, and the number of optical fibers 6A equal to the desired number of channels is arranged.

As illustrated in FIG. 2, the LD array 4 in which a plurality of LDs 4A, each of which has an expected number of defects with respect to the required number of channels, are arranged in series, and the number of optical fibers 6A equal to the required number of channels are on the same plane. And an optical fiber array cable 60 continuously provided on the top.

Lenses 5A corresponding to the respective LDs 4A of the LD array 4 are arranged in series on the same plane.
L between the array 4 and the optical fiber array cable 60
A lens array 5 for optically coupling the D array 4 and the optical fiber array cable 60 to each other is provided.

The lens array 5 has reflection films 5H inclined at 45 degrees with respect to the optical axis on the selected plurality of lenses 5A, and the normal LD 4A is output to the optical fiber 6A corresponding to the defective LD. The incident light shall be shifted.

As illustrated in FIG. 3, the LD array 4 in which a plurality of LDs 4A, each of which has an expected number of defects with respect to the required number of channels, are arranged in series, and each LD 4A of the LD array 4 corresponds to each LD 4A. It has a flat optical fiber array 10 in which an input side optical fiber 9A for receiving the emitted light of the LD 4A is connected in series.

The output side end of each input side optical fiber 9A is an input side tubular fiber array 20 in which the output side optical fibers 9B are arranged on the circumference at an equal pitch, and the number of output side optical fibers 9B is equal to the required number of channels. The light-receiving-side terminal has an output-side tubular fiber array 25 optically coupled to the input-side tubular fiber array 20 arranged at a pitch equal to the arrangement pitch of the optical fibers of the input-side tubular fiber array 20.

Then, the output side tubular fiber array 25 is
The optical fiber cutout portion 25 is provided at the output side end of the input side optical fiber 9A corresponding to the defective LD of the input side tubular fiber array 20.
It is assumed that the fiber is fixed so as to face the input side tubular fiber array 20 with K corresponding thereto.

Alternatively, as illustrated in FIG. 5, the input side cylinder, in which the lenses 30A are arranged at a pitch equal to the arrangement pitch of the input side optical fibers 9A, which is disposed on the exit side of the input side cylindrical fiber array 20. -Type lens array 30 and output-side tubular lens that is arranged on the incident side of the output-side tubular fiber array 25 and that has lenses 35A arranged at a pitch equal to the arrangement pitch of the lenses of the input-side tubular lens array 30 With array 35.

The input side tubular fiber array 20 and the output side tubular fiber array 25 are optically coupled via the input side tubular lens array 30 and the output side tubular lens array 35.

Alternatively, as illustrated in FIG. 6, the input side optical fiber 9A of the input side tubular fiber array and the lens of the input side tubular lens array have the same tubular transparent body.
An input side cylindrical fiber / lens integrated array 40 is provided at 41.

The output side optical fiber 9B of the output side cylindrical lens array and the lens of the output side cylindrical lens array are arranged in the same cylindrical transparent body 46, and the output side cylindrical fiber lens is integrated. It is configured to include the array 45.

Further, as illustrated in FIG. 7, between the input side tubular lens array 30 and the output side tubular lens array 35,
Alternatively, the common electrode 51 is formed in the center between the input side cylindrical fiber / lens integrated array 40 and the output side cylindrical fiber / lens integrated array 45, and the light transmission paths are formed in the outer peripheral parts.
The damping plate 50, in which the individual electrodes 52 corresponding to 53 are arranged,
It is configured to intervene.

[0026]

The number of LDs in the LD array of the present invention is a number in which the number of defectives is expected with respect to the required number of channels.

Therefore, even if there are defective LDs that do not satisfy the characteristics in the LD array, since the number of non-defective LDs equal to the required number of channels is secured, the LD array is provided with an optical fiber having an equal number of required channels. It is optically coupled to a fiber array cable or an output side cylindrical fiber array having output optical fibers equal in number to the required channels.

On the other hand, the ratio of the LD array cost in the total cost of the optical array link module is much higher than the cost of other components. That is, since the expensive LD array is saved and the yield is improved, the total cost of the optical array link module is reduced.

Further, the invention according to claim 6 is provided with an attenuating plate in which a common electrode is formed in a central portion and individual electrodes 52 corresponding to respective light transmission paths are arranged in an outer peripheral portion. Therefore, by selecting an individual electrode corresponding to the light transmission path of an LD having particularly strong optical power and applying a desired voltage, the optical power transmitted to the output side optical fiber of the LD can be weakened as desired. it can.

That is, since the outputs of the respective output side optical fibers can be made uniform, the output quality of the optical array link module is improved.

[0031]

The present invention will be described in detail with reference to the drawings. The same reference numerals denote the same objects throughout the drawings.

FIG. 1 is a plan view of the first embodiment of the present invention,
FIG. 2 is a plan view of the second embodiment of the present invention, FIG. 3 is a configuration diagram of the third embodiment of the present invention, and FIG. 4 is a diagram showing essential points of the third embodiment.

FIG. 5 is a diagram of a fourth embodiment of the present invention, in which (A)
Is a cross-sectional view of a main part, (B) is a perspective view of the input side cylindrical lens array, FIG. 6 is a cross-sectional view of the fifth embodiment of the present invention, and FIG. 7 is a view of the sixth embodiment of the present invention. (A) is a cross-sectional view of a main part and (B) is a plan view of a damping plate.

In FIG. 1, 3 is a drive circuit which is driven by an input electric signal from each input terminal 2 and is equal in number to the required number of channels (4 channels in the figure) formed in parallel on a substrate (not shown). This is an LD drive circuit array that is formed.

Reference numeral 4 denotes an LD array in which a plurality (5 in the figure) of LD4A are arranged in a horizontal row at an equal pitch in anticipation of the number of defective channels with respect to the required number of channels. Reference numeral 5 denotes a lens array in which a plurality of (5 in the figure) lenses 5A are arranged at a pitch equal to the arrangement pitch of the LDs 4A of the LD array 4 in consideration of the number of required channels.

This lens array 5 is one in which focusing lenses are pushed into holes formed at equal pitches in a lens holder, cylindrical lenses are fixed in parallel in a row on a base, or one side of an elongated rectangular parallelepiped. It is a so-called plastic lens or the like in which hemispherical emission surfaces are molded on both sides at an equal pitch.

Reference numeral 6 denotes an optical fiber array cable in which a plurality of (5 in the figure) optical fibers 6A are arranged at a pitch equal to the arrangement pitch of the lenses 5A of the lens array 5 in anticipation of the number of defects with respect to the required number of channels. The optical connector 7 is attached to the end of the optical fiber array cable 6 on the emitting side.

The input terminal 2, the LD drive circuit array 3, the LD array 4, the lens array 5 and the optical fiber array cable 6 as described above are arranged in this order on the base 1. The LD array 4, the lens array 5, and the optical fiber array cable 6 have the same optical axis.

A characteristic test of the LD array 4 was conducted. As a result, for example, when the third LD 4-3A was found to be defective as shown in the figure, the third LD 4-3A of the LD array 4 was removed. The respective LDs 4A and the respective drive circuits of the LD drive circuit array 3 are connected via connection lines.

On the other hand, the third optical fiber 6-3A of the optical fiber array cable 6 is cut. Therefore, the required number of channels (4 in the figure) is attached to the optical connector 7 attached to the output end of the optical fiber array cable 6.
The optical fiber 6A equal to is parallel.

As described above, the present invention corresponds to the defective LD array by manufacturing the LD array in which the LDs of (the required number of channels + the defective number) are arranged in anticipation of the yield of the individual LDs forming the LD array. The optical fiber array cable 6 is used so that the lens and the optical fiber are not used.

Therefore, if the number of defective LDs in the LD array 4 is within the expected number, the LD array can be repaired, and the yield of the LD array 4 is improved. Therefore, the total cost of the optical array link module can be reduced.

The embodiment shown in FIG. 2 is an example in which measures are taken in the lens array portion. An LD array 4 in which a plurality of LDs 4A that are expected to be defective with respect to the required number of channels are connected in series,
Corresponding to the optical fiber array cable 60 in which the same number of optical fibers 6A as the required number of channels are arranged on the same plane and the respective LD 4A of the LD array 4, the number of defective LDs is estimated with respect to the required number of channels. Number of lenses 5A
However, the lens array 5 is continuously provided on the same plane.

Then, the lens array 5 includes a reflecting film 5H inclined at 45 degrees with respect to the optical axis on the selected plurality of lenses 5A.
Is provided, and a normal L is added to the optical fiber 6A corresponding to the defective LD.
The emitted light of D4A is shifted.

More specifically, when the characteristic test of the LD array 4 reveals that the third LD 4-3A is defective, the LD
Each LD4A except the third LD4-3A of array 4
And the LD drive circuit array 3 are connected to the respective drive circuits via connection lines.

On the other hand, in the lens array 5, the third lens 5-3A, the fourth lens 5-4A, and the fifth lens 5-
As 5A, each lens is provided with a reflection film 5H that is inclined by 45 degrees with respect to the optical axis.

By doing this, the fourth LD4-4A
The output light of goes straight and enters the fourth lens 5-4A, and its reflection film 5H changes its course in the direction of 90 degrees and the third lens
The light enters the optical fiber 5-3A, changes its course in the direction of 90 degrees by the reflecting film 5H, and enters the third optical fiber 6-3A.

Similarly, the light emitted from the fifth LD 4-5A is incident on the fourth optical fiber 6-4A via the fifth lens 5-5A and the fourth lens 5-4A. It should be noted that the lens of such a lens array has a central portion with a 45 degree inclined end surface.
It is conceivable that the reflective film 5H is formed by vapor deposition, sputtering, or the like on this 45-degree inclined end face by using a combination of a pair of divided cylindrical lenses.

In FIGS. 3 and 4, reference numeral 3 indicates the number of defects (one in the figures) with respect to the required number of channels (the number of channels in the figures is 11) driven by the input electric signals from the respective input terminals. A plurality of (12 in the figure) drive circuits are formed in parallel on a substrate (not shown).
It is a drive circuit array.

4 is a defective LD for the required number of channels
A large number (12 in the figure) of LD4A are LD arrays arranged in a horizontal row at equal pitches. 10 is a plurality (12 in the figure) corresponding to each LD 4A of the LD array 4 in anticipation of the number of defective LDs with respect to the required number of channels.
The input side optical fiber 9A is a flat optical fiber array arranged in parallel in a row.

This flat optical fiber array 10 has a ferrule attached to the incident side end of the input side optical fiber 9A in each of the holes of an elongated rectangular metal block in which holes are arranged at a pitch equal to the parallel pitch of the LD 4A. It is conceivable that one is inserted and fixed.

Alternatively, it is conceivable that the ferrule mounted on the incident side end of the input side optical fiber 9A is insert-molded in a long and narrow rectangular parallelepiped plastic block at a pitch equal to the parallel pitch of the LD 4A.

The flat type optical fiber array 10 has its incident side end face close to the emitting side of the LD array 4, and after aligning the optical axis of each input side optical fiber 9A with the optical axis of LD4A,
Laser welding to the base 1 (when the block is metal),
Glued with adhesive (if block is plastic)
Then, it is optically coupled to the LD array 4.

Reference numeral 20 denotes an input side in which the output side terminals of the respective input side optical fibers 9A of the flat optical fiber array 10 are embedded in a cylindrical or cylindrical body on the circumference at an equal pitch. It is a cylindrical fiber array.

This input-side tubular fiber array 20 also has
It is conceivable that the input side optical fiber 9A is embedded in a cylindrical or cylindrical metal body or plastic body as desired.

The reference numeral 25 indicates that the number of the optical receiving side terminals of the output side optical fibers 9B equal to the number of required channels (11 in the figure) is within the cylindrical or cylindrical body, and the optical fibers of the input side tubular fiber array 20 are provided. The output side tubular fiber array is embedded and arranged at a pitch equal to the arrangement pitch.

As described above, the output side tubular fiber array 25
The number of output side optical fibers 9B is less than the number of input side optical fibers 9A of the input side tubular fiber array 20.
Therefore, at the position of the output side tubular fiber array 25 corresponding to the 12th input side optical fiber 9A of the input side tubular fiber array 20, there is no output side optical fiber 9B as shown in detail in FIG. The removed part is 25K.

On the other hand, the optical connector 7 is attached to the output side end of each output side optical fiber 9B of the output side tubular fiber array 25. The input side tubular fiber array 20
And the outer diameter of the output side tubular fiber array 25 are equal.

The input side tubular fiber array 20 and the output side tubular fiber array 25 are inserted into the sleeve 15 so as to face each other, and the output side end face of the input side tubular fiber array 20 and the output side tubular fiber array 20. Abut with the incident side end surface of 25,
After that, one of the input side optical fibers 9A corresponding to the defective LD of the input side tubular fiber array 20 is rotated and adjusted so that the cutout portion 25K of the optical fiber corresponds.

Thereafter, the input side tubular fiber array 20 and the output side tubular fiber array 25 are fixed to the sleeve 15. For example, if the second LD4-2A is defective, 2
The second drive circuit 3-2A and the second LD4-2A are not connected. Therefore, since it is not input to the second input-side optical fiber 9-2A, the output-side cylindrical fiber array 25 is placed at a position corresponding to the second input-side optical fiber 9-2A of the input-side cylindrical fiber array 20. The cutout portion 25K is located.

If all the LDs 4A in the LD array 4 are non-defective, one desired LD 4A is prevented from operating,
The LD drive circuit array and the LD array 4 may be connected. Further, when the number of defective LDs is larger than the number of defectives expected, it goes without saying that the LD array 4 is regarded as defective and another LD array is used.

The optical array link module shown in FIG.
3 is different from that shown in FIG. 3 in that an input side tubular lens array and an output side tubular lens array are interposed between the input side tubular fiber array 20 and the output side tubular fiber array 25. is there.

In FIG. 5, reference numeral 30 denotes an array pitch on the circumference of the input side optical fibers 9A of the input side cylindrical fiber array 20 (that is, the number of optical fibers is the number of required channels plus the number of defective LDs). Is an input side cylindrical lens array in which lenses 30A are arranged on the circumference of the same diameter at a pitch equal to.

Reference numeral 35 denotes a lens of the input side cylindrical lens array 30.
This is an output-side cylindrical lens array in which lenses 35A are arranged at a pitch equal to the arrangement pitch of 30A. The input side tubular lens array 30 and the output side tubular lens array 35 are substantially cylindrical or columnar in shape, the outer diameters of which are equal to the outer diameter of the input side tubular fiber array 20.

The input-side tubular lens array 30 and the output-side tubular lens array 35 are formed by molding hemispherical emission surfaces at equal pitches on one or both sides of a substantially cylindrical or columnar synthetic resin transparent body. A so-called plastic lens or the like can be considered.

The boss portion of the input side tubular lens array 30 is fitted into the hole of the input side tubular fiber array 20, and a pair of positioning protrusions 30a on the boss end surface are provided at the bottom of the hole of the input side tubular fiber array 20. The optical axis of each lens 30A is aligned with the optical axis of the input side optical fiber 9A by fitting into the holes, and the input side tubular fiber array 20 and the input side tubular lens array 30 are integrally coupled. There is.

Further, the boss portion of the output side tubular lens array 35 is fitted into the hole of the output side tubular fiber array 25, and the pair of positioning protrusions 35a on the end face of the boss are fitted to the output side tubular fiber array.
The optical axis of each lens 35A is aligned with the optical axis of the output side optical fiber 9B by fitting it into the positioning hole provided on the bottom of the hole 25, and the output side tubular fiber array 25 and the output side tubular lens array 35 are arranged. And are combined together.

The number of output side optical fibers 9B of the output side tubular fiber array 25 is equal to the required number of channels. The input-side tubular fiber array 20 and the output-side tubular lens array 35 are inserted into the sleeve 15 so that the input-side tubular lens array 35 and the output-side tubular lens array 35 face each other. One of the input side optical fibers 9A corresponding to the defective LD of the array 20 is rotationally adjusted so that the cutout portion 25K of the optical fiber corresponds to the output side end.

Thereafter, the flange of the input side tubular fiber array 20 and the end surface of the sleeve 15 are connected to the output side tubular fiber array.
The flange of 25 and the end surface of the sleeve 15 are fixed to the sleeve 15 by laser welding or bonding with an adhesive, respectively.

Now, the optical array link module in which the end face of the input side tubular fiber array 20 and the output side tubular fiber array 25 shown in FIG. If the degree of accuracy is not high, the optical coupling efficiency between the input side optical fiber and the output side optical fiber varies.

However, the input-side tubular fiber array 20 and the output-side tubular fiber array 25 are connected via the input-side tubular lens array 30 and the output-side tubular lens array 35 shown in FIG.
The optical array link module in which the optical coupling is performed has an advantage that there is little variation in the optical coupling efficiency between the input side optical fiber and the output side optical fiber.

In FIG. 6, an input side cylindrical fiber / lens integrated array 40 is a cylindrical or cylindrical cylindrical transparent body 41.
The lens parts 40A having a hemispherical emission surface are arrayed at equal pitches on the circumference of the end surface of the lens with the desired diameter.
The input side optical fiber 9A is embedded so that it coincides with the optical axis of A.

The number of lens portions 40A and the number of input side optical fibers 9A are the numbers obtained by adding the expected number of defective LDs to the required number of channels. The output side cylindrical fiber / lens integrated array 45 has a lens portion 45A having a hemispherical emission surface arranged at an equal pitch on the circumference of the desired diameter of the end surface of the cylindrical or cylindrical cylindrical transparent body 46. The number of output side optical fibers 9B equal to the required number of channels is embedded so as to match the optical axis of each lens portion 45A.

The circular diameter of the lens portion 40A of the input side cylindrical fiber / lens integrated array 40 is equal to the circular diameter of the lens portion 45A of the output side cylindrical fiber / lens integrated array 45.

It is considered that the above cylindrical transparent bodies 41 and 46 are molded, and if ferrules are attached to the input side optical fiber 9A and the output side optical fiber 9B and the ferrules are insert-molded, The optical axis of the lens part and the optical axis of the optical fiber easily coincide with each other.

The input side cylindrical fiber / lens integrated array 40 and the output side cylindrical fiber / lens integrated array 45 are fitted into the sleeve 15 so that the respective lens portions 40A and 45A face each other, and the input side cylinder is inserted. Type fiber array 20 defective L
One of the input side optical fibers 9A corresponding to D is rotated and adjusted so that the cutout portion 25K of the optical fiber corresponds to the output side end of the input side optical fiber 9A.

After that, the flange of the input side cylindrical fiber / lens integrated array 40 and the end surface of the sleeve 15 and the flange and sleeve of the output side cylindrical fiber / lens integrated array 45.
Sleeves are made by bonding the 15 end faces with adhesive.
It sticks to 15.

In FIG. 7, reference numeral 50 denotes a disc-shaped attenuation plate made of glass or the like, which is interposed between the input side cylindrical fiber / lens integrated array 40 and the output side cylindrical fiber / lens integrated array 45.

The damping plate 50 has a common electrode 51 at the center of one surface.
Is provided by vapor deposition or the like, and the lead 55-1 is drawn from the common electrode 51. Further, the same number of individual electrodes 52 as the number of input side optical fibers 9A are formed in parallel on the outer periphery of the surface on which the common electrode 51 is provided, and leads 55-2 are drawn from the individual electrodes 52, respectively.

Therefore, the respective light transmission paths 53 for coupling the input side optical fiber 9A and the output side optical fiber 9B are between the common electrode 51 and the arrayed individual electrodes 52. In the attenuating plate 50 described above, among the LDs arranged in parallel in the LD array, the individual electrode 52 corresponding to the light transmission path of the LD having a particularly high optical power is selected and a desired voltage is applied to the LD, thereby applying the voltage to the LD. The optical power transmitted to the corresponding output side optical fiber 9B can be weakened as desired.

That is, since the attenuation factor can be adjusted by the applied voltage, the outputs of the respective output side optical fibers 9B can be made uniform and the output quality of the optical array link module is improved.

[0082]

As described above, according to the present invention, the number of the electro-optical conversion elements of the LD array is set to be the number of defective channels with respect to the required number of channels. An optical array link module capable of securing a good number of good-quality electro-optical conversion elements equal to the required number of channels. An expensive LD array is relieved to improve the yield and reduce the total cost of the optical array link module. Has excellent effect.

By inserting the attenuation plate, the outputs of the respective output side optical fibers can be made uniform, and the output quality of the optical array link module is improved.

[Brief description of drawings]

FIG. 1 is a plan view of a first embodiment of the present invention.

FIG. 2 is a plan view of a second embodiment of the present invention.

FIG. 3 is a configuration diagram of a third embodiment of the present invention.

FIG. 4 is a diagram showing the main points of a third embodiment.

FIG. 5 is a diagram of a fourth embodiment of the present invention, (A) is a cross-sectional view of a main part, and (B) is a perspective view of an input side cylindrical lens array.

FIG. 6 is a sectional view of a fifth embodiment of the present invention.

FIG. 7 is a diagram of a sixth embodiment of the present invention, (A) is a cross-sectional view of a main part, and (B) is a plan view of a damping plate.

FIG. 8 is a plan view of a conventional example.

[Explanation of symbols]

 2 Input terminals 3,300 LD drive circuit array 4,400 LD array 5,500 Lens array 5H Reflective film 6,60,600 Optical fiber array cable 6A Optical fiber 7 Optical connector 9A Input optical fiber 9B Output optical fiber 10 Flat optical Fiber array 15 Sleeve 20 Cylindrical fiber array on input side 25 Cylindrical fiber array on output side 25K notch 30 Cylindrical lens array on input side 35 Cylindrical lens array on output side 40 Cylindrical fiber-lens integrated array on input side 45 Output side cylinder Fiber-lens integrated array 50 Attenuator 51 Common electrode 52 Individual electrode 53 Light transmission path

Claims (6)

[Claims] 1. An LD array (4) comprising a plurality of LDs (4A), each of which has an expected number of defects with respect to the required number of channels, and each LD (4A) of the LD array (4). And an optical fiber array cable consisting of a series of optical fibers (6A)
(6) and the LD (4A) of the LD array (4), the lenses (5A) are connected in series to correspond to the LD array (4) and the optical fiber array cable (6). The LD array (4)
And a lens array (5) for optically coupling the optical fiber array cable (6) with each other as desired, and the optical fiber array cable (6) includes the LD array (4).
An optical array link module in which the optical fibers corresponding to the defective LD are cut as desired, and the number of optical fibers (6A) equal to the required number of channels are arranged. 2. An LD array (4) comprising a plurality of LDs (4A), each of which has an expected number of defects with respect to the required number of channels, and an optical fiber (6A), the number of which is equal to the number of required channels. The optical fiber array cable (60) and the LD (4A) of the LD array (4) are provided with lenses (5A) connected in series, and the LD array (4) and the optical fiber The LD array (4) is interposed between the fiber array cables (60).
And a lens array (5) for optically coupling the optical fiber array cable (60) with each other as desired, and the lens array (5) is provided in the selected plurality of lenses (5A) with respect to the optical axis. Each has a reflective film (5H) inclined at 45 degrees, and a normal LD (4A) is attached to an optical fiber (6A) corresponding to a defective LD.
An optical array link module, characterized in that the emitted light of A) is shifted. 3. An LD array (4) in which a plurality of LDs (4A), each of which has an expected number of defects with respect to the required number of channels, are arranged in series, and each LD (4A) of the LD array (4) is supported. Then, the flat optical fiber array (10) in which the input side optical fibers (9A) for receiving the emitted light of the respective LDs (4A) are connected in series, and the respective input side optical fibers (9A) The input side cylindrical fiber array (20) in which the output side terminals are arranged at equal pitches on the circumference, and the output side optical fibers (9B) in the number equal to the required number of channels
The light-receiving side terminals are arranged at a pitch equal to the arrangement pitch of the optical fibers of the input side tubular fiber array (20), and the output side tubular fiber array (20) is optically coupled to the input side tubular fiber array (20). 25) and the output side tubular fiber array (25) is an input side optical fiber corresponding to a defective LD of the input side tubular fiber array (20).
An optical array characterized in that it is fixed so as to face the input side tubular fiber array (20) in a state where the optical fiber cut-out portion (25K) corresponds to the output side end of (9A). Link module. 4. The lenses (30A) are arranged at a pitch equal to the arrangement pitch of the input side optical fibers (9A) arranged on the output side of the input side cylindrical fiber array (20) according to claim 3. The input side cylindrical lens array (30) and the array pitch of the lenses of the input side cylindrical lens array (30) arranged on the incident side of the output side cylindrical fiber array (25) according to claim 3. And an output side cylindrical fiber array (20) and an output side cylindrical fiber array (25), in which the lenses (35A) are arranged at an equal pitch to the output side cylindrical lens array (35). The optical array link module is characterized in that it is optically coupled via the input side cylindrical lens array (30) and the output side cylindrical lens array (35). 5. The input side optical fiber (9A) of the input side tubular fiber array according to claim 4 and the lens of the input side tubular lens array according to claim 4 are the same tubular transparent body (41). Input side cylindrical fiber / lens integrated array
(40), the output-side optical fiber (9B) of the output-side tubular lens array according to claim 4 and the lens of the output-side tubular lens array according to claim 4 are the same tubular transparent body (46). An optical array link module, comprising: an output side cylindrical fiber / lens integrated array (45), which is disposed in the. 6. The input side cylindrical lens array according to claim 4.
Between the (30) and the output side cylindrical lens / lens array (35) or between the input side cylindrical fiber / lens integrated array (40) and the output side cylindrical fiber / lens integrated array (45) according to claim 5. A common electrode (51) is formed in the portion, and an attenuation plate (50) in which an individual electrode (52) corresponding to each light transmission path (53) is arranged on the outer peripheral portion is interposed. Optical array link module.