KR100487216B1 - Athermal wavelength division multiplexer/demultiplexer with aligning improvement and aligning method thereof - Google Patents

Abstract

Disclosed is a configuration of a temperature independent wavelength division multiplexing / demultiplexing device having improved alignment. The disclosed wavelength division multiplexing / demultiplexing device includes an optical signal input port 610a, which is an end of a first slab waveguide positioned on a first surface 601, and a second surface 602 adjacent to the first surface 601. A planar waveguide type optical circuit (PLC) including optical signal output ports 614b positioned at ()); And an input / output optical fiber block (660,670) for connecting the optical signal input / output ports (610a, 614b) to the optical fiber, respectively. (1) contacting the first surface (601) and A first input alignment port 604a provided on the first alignment surface 603 spaced apart from and opposed to the second surface 602 and provided with a first output alignment port 604b on the second surface 602. A single alignment waveguide 620; (2) a second alignment waveguide sharing the single input alignment port 604a and provided with a second output alignment port 630b provided on the second side 602 and spaced apart from the first output alignment port 604b. 630; And (3) a 1 × 2 splitter 600 for dividing the optical signal incident through the single input alignment port 604a into the first and second alignment waveguides 620 and 630, respectively.

Description

Temperature-independent wavelength division multiplexing / demultiplexing device with improved alignment and alignment method {ATHERMAL WAVELENGTH DIVISION MULTIPLEXER / DEMULTIPLEXER WITH ALIGNING IMPROVEMENT AND ALIGNING METHOD THEREOF}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temperature independent optical device employed in an optical transmission system and used for wavelength division multiplexing / demultiplexing of optical signals, and in particular, a planar waveguide optical device (PLC). In a process of aligning and bonding an optical fiber block to a circuit), the present invention relates to a temperature-independent wavelength division multiplexing / demultiplexing device that seeks to improve alignment using an alignment waveguide, and an alignment method thereof. .

In general, in a wavelength division multiplexing / demultiplexing communication system used to transmit a large amount of information, an optical signal having N wavelengths is simultaneously transmitted using one strand of optical fiber. The receiving end of a wavelength division multiplexing / demultiplexing communication system based on a single mode optical fiber is mainly used an arrayed waveguide grating (AWG) to separate optical signals having multiple wavelengths.

The operation of a planar waveguide type optical device using a known optical waveguide grating can be described using a known grating equation, considering the optical waveguide grating as a diffraction grating, and dispersing characteristics due to diffraction of incident light. .

In particular, in recent years, a lot of researches have been made on the integration of planar waveguide optical devices for fabricating optical waveguides on planar silicon substrates using planar waveguide technology for the purpose of optical signal processing such as optical signal branching, modulation, switching, and signal multiplexing. have. In order to manufacture such a planar waveguide optical device, a waveguide design, fabrication, alignment, and packaging may be mentioned. A general optical waveguide is an optical transmission path that traps input light and propagates less loss in the longitudinal direction. The optical waveguide includes a core having a large refractive index and a cladding having a small refractive index surrounding the core. In addition, the optical waveguide device splits light by depositing multiple layers of silica or polymer thin films on a silicon or quartz substrate using a difference in refractive index between cores and claddings surrounding the cores, Changes or adjusts the light intensity. The optical waveguide type optical circuit will be easily understood by those skilled in the art.

A configuration of a wavelength division multiplexing / demultiplexing apparatus using a conventional planar waveguide optical circuit will be described with reference to FIGS. 1 to 5.

1 is a perspective view illustrating a configuration of a wavelength division multiplexing / demultiplexing apparatus according to a conventional embodiment. As shown in FIG. 1, each of the input / output optical fiber blocks 12 and 14 serves to connect the planar waveguide optical circuit PLC to each single optical fiber F1 and the ribbon optical fiber F2. N wavelengths are input to an input port of a planar waveguide optical circuit (PLC) through the single optical fiber F1, and the input optical signal is input waveguide 110, first slab waveguide 112, and an optical waveguide thermal grating. (AWG), the second slab waveguide 114 and the output waveguide 116 proceed to the ribbon optical fiber F2. The above-described configuration of the input waveguide 110, the first slab waveguide 112, the optical waveguide grating (AWG), the second slab waveguide 114 and the output waveguide 116 are those of ordinary skill in the art. If you can easily understand.

The input / output optical fiber blocks 12 and 14 fix an alignment state of the optical fibers F1 and F2 using an adhesive B, for example, an adhesive such as an epoxy resin. In addition, glass covers G1 and G2 are attached to the input / output side of the planar waveguide optical circuit to improve assembling. The input / output optical fiber blocks 12 and 14 also support a single optical fiber F1 or a ribbon optical fiber F2 with glass covers G3 and G4 attached thereto, respectively. Although not shown in the figure, the input and output optical fiber blocks 12 and 14 are provided with known V-grooves (not shown in the drawing), respectively, to place bare fibers.

After the planar waveguide optical circuit (PLC) and the input / output optical fiber blocks 12 and 14 are aligned, a wideband laser signal is input to a single optical fiber F1, and an optical signal output from the ribbon optical fiber F2 is input. The alignment is checked by measuring with an optical power meter (not shown). That is, the optical signal emitted by the optical power meter is monitored.

In this case, when fabricating a temperature-independent wavelength division multiplexing / demultiplexing device, a planar waveguide optical circuit (PLC) must have a characteristic that does not change with temperature and divide the wavelength determined by the ITU (International Telecommunication Union). It must have two characteristics.

However, in the conventional wavelength division multiplexing / demultiplexing apparatus, it is very difficult to simultaneously satisfy two characteristics in terms of process reproducibility, and has a problem of low yield. A wavelength division multiplexing / demultiplexing apparatus that solves some of these problems is illustrated in FIGS. 2 and 3. 2 and 3 show the configuration of a conventional temperature independent wavelength division multiplexing / demultiplexing apparatus.

2 and 3, the conventional temperature independent wavelength division multiplexing / demultiplexing apparatus cuts and polishes the input terminal 201 (optical signal input port) of the first slab waveguide 210 to be input by cutting and polishing. By moving the optical fiber block 22, a method of matching the ITU wavelength is selected. The input / output optical fiber blocks 22 and 24 of the conventional wavelength division multiplexing / demultiplexing device serve to connect the planar waveguide optical circuit PLC to each single optical fiber F1 and the ribbon optical fiber F2. N wavelengths are input to an input port of a planar waveguide optical circuit (PLC) through the single optical fiber F1, and the input optical signal is a first slab waveguide 210, an optical waveguide grating, and a second waveguide. Progress to the ribbon optical fiber F2 via the slab waveguide 212 and the output waveguides 214. The configuration of the first slab waveguide 210, the optical waveguide grating (AWG), the second slab waveguide 212 and the output waveguide 214 will be readily understood by those skilled in the art.

In addition, the glass cover (G2) is attached to the output side of the planar waveguide optical circuit (PLC) to improve the assembly. The input / output optical fiber blocks 22 and 24 also support a single optical fiber F1 or a ribbon optical fiber F2 with glass covers G3 and G4 attached thereto, respectively. Although not shown in the figure, the input and output optical fiber blocks 22 and 24 are provided with known V-grooves, respectively, to place bare fibers.

However, the conventional temperature-independent wavelength division multiplexing / demultiplexing apparatus adjusts the alignment state by moving the input optical fiber block 22 in an oblique direction with respect to the output optical fiber block 24, thereby adjusting the precision alignment using the conventional alignment bonding apparatus. There is a problem that the process becomes difficult.

In order to solve this problem, a method of manufacturing an optical device such that an input optical fiber blur and an output optical fiber block are placed in a 90 ° direction to each other is illustrated in FIG. 4.

As shown in FIG. 4, each of the input / output optical fiber blocks 42 and 44 of the temperature-independent wavelength division multiplexing / demultiplexing device according to another embodiment of the present invention may respectively input and output ports of a planar waveguide optical circuit (PLC). It is responsible for the function of connecting to the ribbon optical fiber (F3) and ribbon optical fiber (F4). N wavelengths are input to the input port of the first slab waveguide 410 of the planar waveguide optical circuit through the ribbon optical fiber F3, and the input optical signal is the first slab waveguide 410 and the optical waveguide thermal grating ( AWG), second slab waveguide 412 and output waveguides 414 to the ribbon optical fiber F4. The above-mentioned configuration of the first slab waveguide 410, the optical waveguide grating (AWG), the second slab waveguide 412 and the output waveguides 414 can be easily understood by those skilled in the art. There will be. In this case, the optical signal input port and the optical signal output port are provided on the first surface 401 and the second surface 402 which are adjacent to each other, and the first and second surfaces 401 and 402 face in the vertical direction, respectively. .

The input / output optical fiber blocks 42 and 44 fix an alignment state of the optical fibers F3 and F4 by using an adhesive such as an epoxy resin. In addition, the input / output optical fiber blocks 42 and 44 also support the ribbon optical fibers F3 and F4 to which the glass covers G3 and G4 are attached. Although not shown in the figure, the input and output optical fiber blocks 42 and 44 are provided with known V-grooves, respectively, to place bare fibers. At this time, after the planar waveguide optical circuit PLC and the input / output optical fiber blocks 42 and 44 are aligned, a wideband laser signal is input to the ribbon optical fiber F3 and output from the ribbon optical fiber F4. By measuring the optical signal with the optical power meter to monitor the optical power, the alignment of the input and output optical fiber block is checked.

However, in order to fabricate the device of FIG. 4, when the alignment equipment uses an arrangement in which an input and an output are arranged at 90 °, and an existing alignment device, that is, an input structure in which the input and output axes are arranged on the same axis, the input shaft of the alignment equipment The problem is that the cost increases due to the change required to rotate by 90 ° or to add a new input shaft.

Accordingly, it is an object of the present invention to provide a wavelength division multiplexing / demultiplexing apparatus and an alignment method thereof in pursuit of improving alignment.

Another object of the present invention is to provide a wavelength division multiplexing / demultiplexing device having at least one alignment waveguide to improve alignment.

In order to achieve the above objects, the present invention provides an optical signal input port 610a, which is an end of a first slab waveguide positioned on a first surface 601, and a second surface adjacent to and adjacent to the first surface 601. A planar waveguide type optical circuit (PLC) including optical signal output ports 614b located at 602; And an input / output optical fiber block (660,670) for connecting the optical signal input / output ports (610a, 614b) to the optical fiber, respectively. (1) contacting the first surface (601) and A first input alignment port 604a provided on the first alignment surface 603 spaced apart from and opposed to the second surface 602 and provided with a first output alignment port 604b on the second surface 602. A single alignment waveguide 620; (2) a second alignment waveguide sharing the single input alignment port 604a and provided with a second output alignment port 630b provided on the second side 602 and spaced apart from the first output alignment port 604b. 630; And (3) a 1 × 2 splitter 600 for dividing the optical signal incident through the single input alignment port 604a into the first and second alignment waveguides 620 and 630, respectively.

In addition, the present invention provides a first slab waveguide 610 having optical signal input ports 610a positioned on a first surface 601, and an optical waveguide thermal grating AWG connected to the first slab waveguide 610. ), A second slab waveguide 612 connected to the optical waveguide grating (AWG), and a second surface 602 connected to the second slab waveguide 612 and adjacent to the first surface 601. A planar waveguide type optical circuit (PLC) composed of output waveguides 614 at which optical signal output ports 614b are located; And an input / output optical fiber block (660,670) for connecting the optical signal input / output ports (610a, 614b) to the optical fiber, respectively. (1) contacting the first surface (601) and A first input alignment port 604a provided on the first alignment surface 603 spaced apart from and opposed to the second surface 602 and provided with a first output alignment port 604b on the second surface 602. A single alignment waveguide 620; (2) a second output alignment port 630b sharing the single input alignment port 604a and provided spaced apart from the first output alignment port 604b on the second surface 602, wherein the second A second alignment waveguide 630 via the one slab waveguide 610; And (3) a 1 × 2 splitter 600 for dividing the optical signal incident through the single input alignment port 604a into the first and second alignment waveguides 620 and 630, respectively.

In addition, the present invention provides optical signal input ports 610a positioned on the first surface 601 and optical signal output ports 614b provided on the second surface 602 adjacent to the first surface 601. A wavelength division multiplexing / demultiplexing device for aligning and bonding the input / output optical fiber blocks 660 and 670 to the optical signal input ports 610a and the optical signal output ports 614b, respectively, in a planar waveguide optical circuit (PLC) composed of (1) a single input alignment port 604a provided on a first alignment surface 603 which is in contact with the first surface 601 and spaced apart from and opposed to the second surface 602, A first step of preparing a planar waveguide optical circuit (PLC) provided with alignment waveguides (620, 630) each having output alignment ports (604b, 630b) provided on the second surface (602); (2) a second step of aligning the input optical fiber block 660 with the single input alignment port 604a; (3) a third process of outputting the optical signal from the input optical fiber block 660 and then aligning and bonding the output optical fiber block 670 using the optical signals emitted from the output alignment ports 604b and 630b; (4) a fourth step of rotating the planar waveguide optical circuit (PLC) to which the output optical fiber block 670 is bonded at a predetermined angle about a center; And (5) a fifth process of moving the input optical fiber block 660 along the first surface 601 to align the optical signal input ports 610a of the rotated planar waveguide optical circuit PLC.

In addition, the present invention provides optical signal input ports 610a positioned on the first surface 601 and optical signal output ports 614b provided on the second surface 602 adjacent to the first surface 601. A wavelength division multiplexing / demultiplexing device for aligning and bonding the input / output optical fiber blocks 660 and 670 to the optical signal input ports 610a and the optical signal output ports 614b, respectively, in a planar waveguide optical circuit (PLC) composed of In the alignment method of (1), the first slab waveguide 610 having optical signal input ports 610a located on the first surface 601, and the optical waveguide connected to the first slab waveguide 610 A thermal grating AWG, a second slab waveguide 612 connected to the optical waveguide thermal grating AWG, and a second slab waveguide 612 and adjacent to the first surface 601. To prepare a planar waveguide type optical circuit (PLC) composed of output waveguides 614 in which optical signal output ports 614b are located on two sides 602. 1 process; (2) A single input provided to the first alignment surface 603 in contact with the first surface 601 and spaced apart from the second surface 602 in contact with the planar waveguide optical circuit prepared by the first process. To prepare a planar waveguide optical circuit (PLC) further provided with alignment waveguides 620 and 630 each having an alignment port 604a and output alignment ports 604b and 630b provided on the second surface 602, respectively. Second process; (3) a third step of aligning the input optical fiber block 660 with the single input alignment port 604a; (4) a fourth step of aligning and bonding the output optical fiber block 670 using the optical signals emitted from the output alignment ports 604b and 630b after emitting the optical signal from the input optical fiber block 660; (5) a fifth step of rotating the planar waveguide optical circuit (PLC) to which the output optical fiber block 670 is bonded at a predetermined angle about a center; And (6) a sixth process of moving and arranging the input optical fiber block 660 along the first surface 601 to the optical signal input ports 610a of the rotated planar waveguide optical circuit PLC.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention. In describing the present invention, detailed descriptions of related well-known functions or configurations are omitted in order not to obscure the subject matter of the present invention.

5 is a plan view illustrating a configuration of a wavelength division multiplexing / demultiplexing apparatus according to an exemplary embodiment of the present invention. As shown in FIG. 5, the wavelength division multiplexing / demultiplexing apparatus according to the present invention further includes at least one or more alignment waveguides 620 and 630, a splitter 600, and a combiner 640. It is equipped with the improved device in the alignment process. That is, the present invention further includes the alignment waveguides 620 and 630, the divider 600, and the combiner 640 to connect and support a planar waveguide optical circuit (PLC) to the optical fiber. 660,670) in pursuit of improved alignment.

Specifically, the wavelength division multiplexing / demultiplexing apparatus according to the present invention is a chip type optical device, and includes a first surface 601 and a second surface 602, and the first surface 601 is an input to which optical signals are input. The second surface 602 is an output surface to which incident optical signals are output. The input surface 601 and the output surface 60 are adjacent to each other and perpendicular to each other. The planar waveguide optical circuit (PLC) includes a first slab waveguide (610), an arrayed waveguide grating (AWG), and a second to multiplex or demultiplex the incident optical signals. Slab waveguide 612 and output waveguides 614.

Input ports 610a of the first slab waveguide 610 are disposed on the input surface 601, and output ports 614b of the output waveguides 614 are disposed on the output surface 602. Accordingly, the optical signals incident through the input ports 610a of the first slab waveguide may include a first slab waveguide 610, an optical waveguide grating (AWG), a second slab waveguide 612, and output waveguides ( Output to output ports 614b via 614. The detailed configuration of the above-mentioned first slab waveguide 610, optical waveguide grating (AWG), second slab waveguide 612, output waveguides 614 can be easily understood by those skilled in the art. Detailed description thereof is omitted.

Preferably, the first alignment surface 603 is positioned in an opposite direction to the output surface 602 in which the plurality of output ports 614b of the output waveguides 614 are disposed. That is, the first alignment surface 603 and the output surface 601 are surfaces facing each other. In addition, the second alignment surface 604 is positioned in a direction opposite to the input surface 601 where the optical signal input ports 610a of the first slab waveguide are located. The second alignment surface 604 and the input surface 601 are surfaces facing each other. Since the input surface 601 and the second alignment surface 604 are parallel, and the output surface 602 and the first alignment surface 603 are parallel, the first and second alignment surfaces 603 and 604 are adjacent to each other. Contact

A wavelength division multiplexing / demultiplexing apparatus according to the present invention is provided with a single input port 604a at the first alignment surface 603 and a first output alignment port 604b at the output surface 602. A second output alignment port 630b which shares an alignment waveguide 620 with the single input alignment port 604a and is provided on the output surface 602 to be spaced apart from the first output alignment port 604b. A two alignment waveguide 630 is provided. The apparatus further includes a divider 600 for dividing the optical signals incident through the single input alignment port 604a into the first and second alignment waveguides 620 and 630, respectively. The divider 600 is preferably configured as a 1 × 2 divider to divide the incident optical signals into the first and second alignment waveguides 620 and 630.

The first alignment waveguide 620 is a linear waveguide parallel to the second alignment surface 604 and is divided by the divider 600 among the optical signals incident from the single input alignment port 604a. A waveguide through which an optical signal travels. The single input alignment port 604a of the first alignment waveguide 620 is disposed at the first alignment surface 603 and its output alignment port 604b is disposed at the output surface 602.

The second alignment waveguide 630 is a waveguide through which the second optical signal divided by the divider 600 travels, and includes a linear waveguide and a curved waveguide. The second optical signal propagated through the second alignment waveguide 630 is emitted to the combiner 640 via the first slab waveguide 610. The coupler 640 is preferably composed of N × 1 coupler. The second optical signals via the combiner 640 are emitted to the output optical fiber 670 through the output alignment port 630b. In this case, optical signal output ports 614b are disposed between the first and second output alignment ports 604b and 630b. An alignment process of aligning the planar waveguide optical circuit having the above-described configuration with the input / output optical fiber blocks 660 and 670 using the alignment device not shown will be described with reference to FIGS. 6A and 6B.

As shown in FIG. 6A, the input optical fiber block 660 is moved to face the first alignment surface 603 and aligned with the input alignment port 604a. After the output port of the input optical fiber block 660 is aligned with the input alignment port 604a of the first alignment waveguide, and then the optical signals are input through the single optical fiber of the input optical fiber block 660, the input optical The signals proceed and are divided into a first optical signal and a second optical signal by the 1 × 2 divider 600. The first optical signal travels along the first alignment waveguide 620 and exits through the output alignment port 604b. At the same time, the second optical signal passes through the second alignment waveguide 630 and the first slab waveguide. After passing through 610, the Nx1 coupler 640 and the second alignment waveguide 630 continue to be emitted. At this time, the output optical fiber block 670 is aligned through the optical signals emitted through the output alignment ports 604b and 630b of the first and second alignment waveguides 620 and 630. That is, the output alignment ports are used to align the output port 614b of the output waveguide and the input ports of the output optical fiber block 670. In the alignment process of the output optical fiber block 670, the bonding operation is performed using a conventional alignment bonding apparatus. Examples of the adhesive may be an adhesive process through an epoxy resin, an ultraviolet curing epoxy resin or welding.

Next, a state in which the output optical fiber block 670 aligned and bonded to the output surface 602 of the planar waveguide optical circuit is rotated 90 ° clockwise about the center is illustrated in FIG. 6B. As shown in FIG. 6B, the optical signal input ports 610a of the first slab waveguide of the planar waveguide optical circuit move to the position where the input optical fiber block 660 is located. In this state, since the output optical fiber block 670 is aligned and bonded to the output ports, only the process of aligning and contacting only the input optical fiber block 660 remains. That is, the alignment of the input optical fiber block 660 is completed after the alignment of the input optical fiber block 660 by moving the input optical fiber block 660 in the direction of an arrow, that is, along the first alignment surface 603 using an existing alignment bonding device. . At this time, the input optical fiber block 660 may be moved in the direction of the arrow and adjusted to satisfy the criteria of the wavelength determined by the ITU. 6C illustrates a state in which the input / output optical fiber block 660 is aligned and bonded to the input / output ports of the planar waveguide optical circuit in this order.

As described above, the present invention includes two alignment waveguides, a 1 × 2 splitter and an N × 1 coupler, thereby achieving an improvement in the alignment process.

1 is an enlarged perspective view illustrating a configuration of a wavelength division multiplexing / demultiplexing apparatus according to a conventional embodiment.

Fig. 2 is an enlarged perspective view showing the structure of a conventional temperature independent wavelength division multiplexing / demultiplexing apparatus.

3 is a plan view of FIG.

4 is an enlarged plan view illustrating a configuration of a temperature independent wavelength division multiplexing / demultiplexing apparatus according to another exemplary embodiment of the prior art.

5 is an enlarged plan view illustrating a configuration of a temperature independent wavelength division multiplexing / demultiplexing apparatus according to an exemplary embodiment of the present invention.

6A is a plan view illustrating a state for aligning an output optical fiber block using an input optical fiber block in an alignment process of a temperature independent wavelength division multiplexing / demultiplexing apparatus according to an exemplary embodiment of the present invention.

6B is a view illustrating an input optical fiber by rotating a planar waveguide optical circuit 90 ° clockwise after the output optical fiber blocks are aligned and bonded in the alignment process of the temperature independent wavelength division multiplexing / demultiplexing apparatus according to an exemplary embodiment of the present invention. A plan view showing a state for aligning blocks.

FIG. 6C is a plan view illustrating a state in which an alignment bonding process of a temperature independent wavelength division multiplexing / demultiplexing apparatus according to an exemplary embodiment of the present invention is completed. FIG.

Claims (17)

Optical signal input ports 610a which are ends of the first slab waveguide located on the first surface 601 and optical signal output ports located on the second surface 602 adjacent to the first surface 601. A planar waveguide optical circuit (PLC) including 614b; And an input / output optical fiber block (660, 670) connecting the optical signal input / output ports (610a, 614b) to an optical fiber, respectively. (1) A single input alignment port 604a is provided on the first alignment surface 603 that is in contact with the first surface 601 and is spaced apart from the second surface 602 to replace the second surface 602. A first alignment waveguide 620 provided with a first output alignment port 604b at 602; (2) a second alignment waveguide sharing the single input alignment port 604a and provided with a second output alignment port 630b provided on the second side 602 and spaced apart from the first output alignment port 604b. 630; And (3) wavelength division multiplexing, characterized in that it consists of a 1x2 splitter 600 for dividing the optical signal incident through the single input alignment port 604a into the first and second alignment waveguides 620 and 630, respectively. / Demultiplexer. The waveguide of claim 1, wherein the first alignment waveguide 620 is configured as a linear waveguide, and is provided in a direction parallel to the first surface 601. The second alignment waveguide 630 is a linear waveguide and a curved waveguide. Wavelength division multiplexing / demultiplexing apparatus characterized in that the configuration. 2. The wavelength division multiplexing / demultiplexing device according to claim 1, wherein the second alignment waveguide (630) further comprises a coupler (640), wherein the coupler (640) is composed of N x 1 couplers. A first slab waveguide 610 having optical signal input ports 610a positioned on a first surface 601, an optical waveguide grating (AWG) connected to the first slab waveguide 610, and the optical Optical signal output to a second slab waveguide 612 connected to a waveguide grating (AWG) and a second surface 602 connected to the second slab waveguide 612 and adjacent to the first surface 601. A planar waveguide type optical circuit (PLC) composed of output waveguides 614 in which ports 614b are located; And an input / output optical fiber block (660, 670) connecting the optical signal input / output ports (610a, 614b) to an optical fiber, respectively. (1) A single input alignment port 604a is provided on the first alignment surface 603 that is in contact with the first surface 601 and is spaced apart from the second surface 602 to replace the second surface 602. A first alignment waveguide 620 provided with a first output alignment port 604b at 602; (2) a second output alignment port 630b sharing the single input alignment port 604a and provided spaced apart from the first output alignment port 604b on the second surface 602, wherein the second A second alignment waveguide 630 via the one slab waveguide 610; And (3) wavelength division multiplexing, characterized in that it consists of a 1x2 splitter 600 for dividing the optical signal incident through the single input alignment port 604a into the first and second alignment waveguides 620 and 630, respectively. / Demultiplexer. 5. The linear waveguide of claim 4, wherein the first alignment waveguide 620 is configured as a linear waveguide and is provided in a direction parallel to the first surface 601. The second alignment waveguide 630 is a linear waveguide and a curved waveguide. Wavelength division multiplexing / demultiplexing apparatus characterized in that the configuration. 5. The wavelength division multiplexing / demultiplexing device according to claim 4, wherein the second alignment waveguide (630) further comprises a coupler (640), wherein the coupler (640) is configured as an Nx1 coupler. 5. The apparatus of claim 4, wherein output ports (614b) of the output waveguide (614) are located between the first and second output alignment ports (604b, 630b). 7. The wavelength division multiplexing / demultiplexing apparatus according to claim 6, wherein the coupler (640) is connected to the first slab waveguide (610). A first slab waveguide 610, optical signal input ports 610a of the first slab waveguide 610 positioned on the first surface 601, and a second surface adjacent to the first surface 601. The planar waveguide type optical circuit (PLC) composed of the optical signal output ports 614b provided on the surface 602 is connected to the optical signal input ports 610a and the optical signal output ports 614b. In the alignment method of the wavelength division multiplexing / demultiplexing device for aligning and bonding each, (1) a single input alignment port 604a provided on the first alignment surface 603 which is in contact with the first surface 601 and spaced apart from and opposed to the second surface 602, and the second surface 602. A first step of preparing a planar waveguide optical circuit (PLC) provided with alignment waveguides (620, 630) having output alignment ports (604b, 630b) provided at each of the plurality of waveguides; (2) a second step of aligning the input optical fiber block 660 with the single input alignment port 604a; (3) a third process of outputting the optical signal from the input optical fiber block 660 and then aligning and bonding the output optical fiber block 670 using the optical signals emitted from the output alignment ports 604b and 630b; (4) a fourth step of rotating the planar waveguide optical circuit (PLC) to which the output optical fiber block 670 is bonded at a predetermined angle about a center; And (5) a fifth process of moving the input optical fiber block 660 along the first surface 601 to align the optical signal input ports 610a of the rotated planar waveguide optical circuit PLC. How to sort. 10. The alignment method according to claim 9, wherein the third process further comprises a division process of dividing the optical signals incident through the single input alignment port 604a using the 1x2 splitter 600. . The optical signal passing through the alignment waveguide 630 after the dividing process is combined using an n × 1 combiner 640 and then output through the output alignment port. Sorting method characterized in that. The waveguide of claim 9, wherein the alignment waveguides include first and second alignment waveguides 630 and 640, and the first alignment waveguide 630 comprises a linear waveguide and is provided in a direction parallel to the first surface 601. And the second alignment waveguide (630) comprises a linear waveguide and a curved waveguide. 10. An alignment method according to claim 9, wherein the output alignment ports (604b, 630b) are located at a distance from each other. The method of claim 9, wherein the predetermined angle of the fourth process is 90 °. A planar waveguide comprising optical signal input ports 610a positioned on the first surface 601 and optical signal output ports 614b provided on the second surface 602 adjacent to the first surface 601. In the alignment method of the wavelength division multiplexing / demultiplexing apparatus for aligning and bonding the input / output optical fiber blocks 660 and 670 to the optical signal input ports 610a and the optical signal output ports 614b in the optical circuit PLC, respectively. , (1) a first slab waveguide 610 having optical signal input ports 610a positioned on a first surface 601, and an optical waveguide thermal grating AWG connected to the first slab waveguide 610; And a second slab waveguide 612 connected to the optical waveguide grating (AWG), and a second surface 602 connected to the second slab waveguide 612 and adjacent to the first surface 601. Preparing a planar waveguide type optical circuit (PLC) including output waveguides 614 in which optical signal output ports 614b are located; (2) A single input provided to the first alignment surface 603 in contact with the first surface 601 and spaced apart from the second surface 602 in contact with the planar waveguide optical circuit prepared by the first process. To prepare a planar waveguide optical circuit (PLC) further provided with alignment waveguides 620 and 630 each having an alignment port 604a and output alignment ports 604b and 630b provided on the second surface 602, respectively. Second process; (3) a third step of aligning the input optical fiber block 660 with the single input alignment port 604a; (4) a fourth step of aligning and bonding the output optical fiber block 670 using the optical signals emitted from the output alignment ports 604b and 630b after emitting the optical signal from the input optical fiber block 660; (5) a fifth step of rotating the planar waveguide optical circuit (PLC) to which the output optical fiber block 670 is bonded at a predetermined angle about a center; And (6) a sixth process of shifting and arranging the input optical fiber block 660 along the first surface 601 to the optical signal input ports 610a of the rotated planar waveguide optical circuit PLC. Sorting method by. 16. The alignment method according to claim 15, wherein the fourth process further comprises a division process of dividing the optical signals incident through the single input alignment port 604a using the 1x2 splitter 600. . The method of claim 16, wherein after the dividing process, the optical signals passing through the alignment waveguide 630 pass through the first slab waveguide 610; And combining the optical signals emitted through the first slab waveguide (610) using an n × 1 combiner (640).