JPH1051382A - Optical cross connector and add/drop device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain cross-connect an optional wavelength among a plurality of optional inputs and outputs. SOLUTION: Input optical fibers 30a-30d are respectively connected to input ports #1, #5 and #13 of a 16×16 array guide path grating 32 at an interval of 4 wavelength bands. Output ports #1-#16 of the array guide path grating 32 are distributed into four and connected to input ports of optical switches corresponding to each wavelength among 6 sets of 4×4 optical switches 34-1-34-16. In total 64 (=4×16) output ports of the optical switches 34-1-34-16 are connected to input ports corresponding to each wavelength in the 16×16 array guide path grating 36. Output optical fibers 38a, 38b, 38c, 38d are connected to the output ports #1-#4 of the array waveguide grating 36.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical cross-connect device and an add / drop device, and more particularly to an optical cross-connect device and an add / drop device. Optical cross-connecting optical signals of different optical wavelengths to another arbitrary optical fiber
The present invention relates to a connect device and an add / drop device.

[0002]

2. Description of the Related Art In recent years, research on optical fiber communication networks using optical wavelength division multiplexing transmission technology has been actively conducted. An arrayed waveguide grating is known as an element for collectively separating wavelength-multiplexed optical signals. For example, when _n wavelength-multiplexed optical signals of _n wavelengths λ _{1 to} λ n at equal wavelength intervals are input to each input port of an array waveguide grating having n input ports and n output ports as shown in FIG. n output ports # 1 to #
n, the respective wavelengths λ ₁ to λ _n are separated and output. In addition, the wavelength output from each of the output ports # 1 to #n is sequentially shifted according to the input port to be input due to the periodicity of the arrayed waveguide grating.

For example, if the wavelength-multiplexed optical signal of the wavelength lambda ₁ to [lambda] _n to the input port # 1 is input, that wavelength lambda ₁ is outputted from the output port # 1, the wavelength lambda ₂ from the output port # 2 The wavelength λ _n is output from the output port #n. Assuming that a wavelength multiplexed optical signal having wavelengths λ ₁ to λ _n is input to the input port # 2, the wavelength λ ₁ is output from the output port #n, and the wavelength λ ₂ is output from the output port # 1. λ _n is output from output port # (n−1). Generally, when an optical signal of wavelength λ _i input to input port #k is denoted as λ _i (k), this optical signal is output from output port #m. Here, m is obtained when m = ik + 1 + nik + 1 + 1 and m = ik + 1 + ni-k + 1 <1.

[0004] In order for a wavelength division multiplexing optical communication network to use only optical signals except for its input part and output part, an optical signal from an arbitrary input optical fiber among a plurality of input optical fibers is transmitted. An optical cross-connect device for connecting to any one of the plurality of output optical fibers is required. In the case of the wavelength division multiplexing transmission method, it is necessary to be able to connect any input optical fiber to any output optical fiber for each wavelength. Conventionally, a configuration has been proposed in which a plurality of wavelength division multiplexed optical signals are individually wavelength-separated, and each wavelength is switched by an optical switch and connected to another optical fiber (for example, GR Hill et al., "A Transp").
ort Network LayerBased on
Optical Network Element
s ", IEEE-LT Vo.11, No. 5/6, 1
993)).

FIG. 9 shows an optical cross-connect device for connecting an optical signal of an arbitrary wavelength from three input optical fibers to an arbitrary optical fiber among three output optical fibers in a four-wavelength multiplex system. 1 shows a schematic block diagram of a conventional example. Wavelength-division multiplexed optical signals of wavelengths λ _{1 to} λ ₄ propagate to the three input optical fibers 10a, 10b, and 10c, respectively, and are input to input ports # 1 of 4 × 4 arrayed waveguide gratings 12a, 12b, and 12c. I do. Array waveguide gratings 12a, 12b, 1
2c functions as an element for wavelength separating the WDM optical signal of the wavelength lambda ₁ to [lambda] _4, the wavelengths lambda ₁ to [lambda] ₄ four output ports #
Output from # 1 to # 4.

[0006] Arrayed waveguide gratings 12a, 12b, 12c
The optical signal of the wavelength λ ₁ is separated by the optical switch 14 into the optical switch 14 of 3 × 3, the optical signal of the wavelength λ ₂ is supplied to the optical switch 16 of 3 × 3, and the optical signal of the wavelength λ ₃ is supplied to the optical switch of 3 × 3. 18
The optical signal having the wavelength λ ₄ is applied to the 3 × 3 optical switch 20. Obviously, the optical switches 14, 16,
18 and 20 requires only the number of wavelengths to be wavelength-multiplexed, the optical switch 14 is a wavelength lambda ₁ and the cross-connect, an optical switch 16 is a wavelength lambda ₂ to cross-connect, an optical switch 18 is a wavelength lambda ₃ Cross・ Connect and optical switch 20
Cross-connects wavelength λ ₄ .

The three outputs of the optical switch 14 are respectively
Input to the input port # 1 of the 4 × 4 arrayed waveguide gratings 22a, 22b, and 22c, the three outputs of the optical switch 16 are respectively connected to the 4 × 4 arrayed waveguide gratings 22a, 22b, and 22c.
Input to the input port # 2 of the optical switch 18c,
The two outputs are each a 4 × 4 arrayed waveguide grating 22
a, 22b, and 22c are input to input ports # 3, and the three outputs of the optical switch 20 are respectively input to input ports # 4 of 4 × 4 arrayed waveguide gratings 22a, 22b, and 22c. The arrayed waveguide gratings 22a, 22b, and 22c correspond to the wavelengths λ _{1 to} λ ₄ from the optical switches 14, 16, 18, and 20, respectively.
Function as an optical element for wavelength multiplexing the optical signals of the above. Output light from the arrayed waveguide gratings 22a, 22b, 22c is supplied to output optical fibers 24a, 24b, 24c.

With such a configuration, the optical switches 14, 1
By switching the input / output connections at 6, 18, and 20, arbitrary input optical fibers 10a, 10b, 10c
Of the arbitrary wavelengths λ _{1 to} λ ₄
a, 24b, and 24c.
Of course, the optical switches 14, 16, 18 do not connect two of the four inputs to the same output port, so that optical signals of the same wavelength propagating through different input optical fibers 10a, 10b, 10c can be output to the same output optical fiber. 24a, 24b, 24c
Do not connect to When the time division multiplexing method is applied, the optical switches 14 and 1 are switched according to the timing of the time axis.
6, 18, and 20 are controlled.

[0009]

In the conventional example shown in FIG. 9, the number of the array type waveguide elements 12a to 12c, 22 is twice the number corresponding to the number of optical fibers to be cross-connected.
a and 22c are required, and optical switches having input ports and output ports corresponding to the number of optical fibers to be cross-connected must be prepared by the number corresponding to the number of wavelengths to be optically multiplexed.

An object of the present invention is to provide an optical cross-connect device which realizes a similar function with fewer optical elements.

It is another object of the present invention to provide an add / drop device having a simple structure capable of adding an arbitrary wavelength and dropping an arbitrary wavelength.

[0012]

An optical cross according to the present invention is provided.
The connecting device includes an n-input / n-output first and second arrayed waveguide grating capable of periodically and repeatedly outputting n wavelengths at wavelengths at fixed intervals, and the first and second arrayed waveguides. M inputs and m outputs connected between grids (where m × m
.Ltoreq.n). Then, the input light transmitting means is connected to each of the m input ports at m intervals among the n input ports of the first arrayed waveguide grating.

[0013] The n output ports of the first arrayed waveguide grating are connected to the input ports of the optical switch means corresponding to the wavelengths that can be output from each of the output ports. Output light transmitting means is connected to each of the predetermined m output ports of the second arrayed waveguide grating. A second arrayed waveguide, wherein each of the m output ports of the optical switch means outputs a wavelength corresponding to the optical switch means from the m output ports of the second arrayed waveguide grating. Connect to the input port of the grid.

Some of the plurality of input light transmitting means include:
An add / drop device can be realized by inputting an optical signal to be added and extracting an optical signal to be dropped from any of the plurality of output light transmitting means.

In this way, it is possible to cross-connect any wavelength between a plurality of inputs and a plurality of outputs with a small number of optical elements. Since it can be realized with a small number of optical elements, the scale can be reduced and the manufacturing cost can be reduced.

[0016]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a block diagram showing a schematic configuration of an embodiment of the present invention. In this embodiment, 16 wavelengths are optically multiplexed, and the number of input optical fibers and the number of output optical fibers are four. Reference numerals 30a, 30b, 30c, and 30d denote input optical fibers, whose output lights are input ports # 1 and # 5 of a 16 × 16 arrayed waveguide grating 32 at every four wavelengths, respectively.
And # 13. The output ports # 1 to # 16 of the arrayed waveguide grating 32 are branched into four,
It is connected to a predetermined input port of an optical switch device 34 composed of 4 × 4 optical switches 34-1 to 34-16. A total of 64 (= 4 × 16) optical switches 34-1 to 34-16
Output ports are 16 × that function as wavelength multiplexing elements.
Connected to predetermined input ports of 16 arrayed waveguide gratings 36. The array waveguide grating 36 has its output ports # 1 to # 1.
Using only # 4, the output optical fibers 38a,
38b, 38c, 38d are connected.

FIG. 2 shows input / output characteristics of a 16 × 16 arrayed waveguide grating used as the arrayed waveguide gratings 32 and 36. FIG. 2 corresponds to the case where n = 16 in FIG. As can be seen from this figure, the arrayed waveguide grating has both a wavelength separating function and a wavelength multiplexing function. For example, wavelength λ ₄
Note that when input is made to input port # 1, output is made from output port # 4, when input is made to input port # 5, output is made from output port # 16, and input port # 9
Is input from output port # 12, and input to input port # 13 is output from output port # 8.

When the wavelengths λ _{1 to} λ ₁₆ are input to the input ports # 1 to # 16, respectively, the wavelength multiplexed light is output from the output port # 1, and the input ports # 1 to # 16 are output.
When wavelengths λ _{2 to} λ ₁₆ and λ ₁ are input to the respective ports, the wavelength multiplexed light is output from output port # 2, and wavelengths λ _{3 to} λ ₁₆ , λ ₁ and λ ₂ , the wavelength multiplexed light is output from the output port # 3, and the wavelength λ is input to each of the input ports # 1 to # 16.
_{When 4 to} λ ₁₆ and λ _{1 to} λ ₃ are input, those wavelength-multiplexed lights are output from the output port # 4.

In the arrayed waveguide grating 36, the output port #
5 to # 16 are not used. Thus, for example, if you enter the input port # optical signal having a wavelength other than the lambda ₁ to [lambda] ₄ to 1 of the arrayed waveguide grating 36, not output from any of the output ports # 1 through # 4. This means that input light of unnecessary wavelengths is blocked.

[0021] Each optical switch 34-1～34-16 in accordance with external control signals, a switch element for connecting the optical signals input to the four input ports to any one of the respective four output ports, the wavelength lambda ₁ ~ It is provided according to lambda _16. That is, the optical switches the optical switch 34-1 is provided with respect to the wavelength lambda _1, the optical switch optical switch 34-2 provided with respect to the wavelength lambda _2, hereinafter the same, an optical switch 34-16 wavelength lambda _This is an optical switch provided for ₁₆ .

FIG. 3 shows the wiring of the output ports of the arrayed waveguide grating 32, the optical switches 34-1 to 34-16, and the input ports of the arrayed waveguide grating 36. In order to facilitate understanding, the optical switches 34-1, 34-5, 34-9, 34
Only -13 is shown. Array waveguide grating 32
The wavelength output from each output port is added to the output port, and the wavelength to be input to each input port is added to the input port of the arrayed waveguide grating 36. The output optical fibers 38a to 38d can be selected depending on which of the four input ports of the arrayed waveguide grating 36 to which the same wavelength is added, an optical signal of that wavelength is input.

The four input ports of the optical switch 34-1, the arrayed waveguide grating 32, the output port # 1 to output the wavelength lambda _1, # 5, and connected to the # 9 and # 13,
Four output ports of the optical switch 34-1, the arrayed waveguide grating 36, the input ports # 1 to be input to the wavelength lambda _1,
Connect to # 16, # 15 and # 14 respectively. Generally, the four input ports of the optical switch 34-i are output ports # of the arrayed waveguide grating 32 that output the wavelength λ _i.
i, # (i + 4), # (i + 8) and # (i + 12)
(However, if the port number exceeds 16, 16 is subtracted.)
One output port is the wavelength λ _i of the arrayed waveguide grating 36.
Input ports #i, # (i-1), # (i-
2) and # (i-3) (however, if the port number is 0 or less, add 16).

As can be seen from FIG. 3, each output port of the arrayed waveguide grating 32 is branched into four and connected to the inputs of predetermined optical switches 34-1 to 34-16. A predetermined optical switch 34 is connected to the input port.
Four outputs -1 to 34-16 are connected.

As described above, the arrayed waveguide grating 3
6 is an optical signal input to the input ports # 1 to # 16,
Optical signals other than the wavelength assigned to each input port are not output from any of the output ports # 1 to # 4. Therefore,
For example, the output port # 1 of the arrayed waveguide grating 32
Wavelength lambda ₁ from the input port # 1, the wavelength lambda ₅ from the input port # 5, the optical signal of wavelength lambda ₁₃ from the wavelength lambda ₉ and the input port # 13 from the input port # 9 can be present, the optical switch 34-1 is an output port # 1 of the arrayed waveguide grating 32
Even as it connected to the input port # 1 of the arrayed waveguide grating 36, substantially only the wavelength lambda ₁ of the output port # 1 of the arrayed waveguide grating 32 to the input port # 1 of the arrayed waveguide grating 36 Input.

Here, paying attention to the wavelength λ ₅ , the input optical fibers 30 a to 30 d to the output optical fibers 38 a to 38 d
And how they are connected. The optical signals of wavelength λ ₅ propagating through the input optical fibers 30 a, 30 b, 30 c and 30 d respectively enter the input ports # 1, # 5, # 9 and # 13 of the arrayed waveguide grating 32 and output the signals. Output from ports # 5, # 1, # 13 and # 9. Output ports # 1, # 5, # of arrayed waveguide grating 32
9 and # 13 can output wavelengths λ ₁ , λ ₅ , λ
It is ₉ and λ _13. Therefore, the output ports # 1, # 5, # 9 and # 13 of the arrayed waveguide grating 32 are connected to the optical switch 3
4-1, 34-5, 34-9 and 34-13.

The four output ports of the optical switch 34-5 are input ports # 2 and # 2 of the arrayed waveguide grating 36, respectively.
3, # 4 and # 5. Optical switch 34-9-4
The four output ports are respectively connected to the input ports # 6, # 7, # 8 and # 9 of the array waveguide grating 36, and the four output ports of the optical switches 34-13 are respectively connected to the input ports of the array waveguide grating 36. The four output ports of the optical switch 34-1 are connected to # 10, # 11, # 12 and # 13, respectively.
1, # 16, # 15 and # 14. However, the input ports # 6 to # 6 of the arrayed waveguide grating 36 to which the output ports of the optical switches 34-9, 34-13 and 34-1 are connected.
Since the wavelengths λ ₅ are not assigned to any of # 16 and # 1, the optical switches 34-9, 34-13 and 34-
In any connection state, 1 is invalid as an input to the arrayed waveguide grating 36, and only an input from the optical switch 34-5 is valid for the arrayed waveguide grating 36.

Optical signals of wavelengths λ ₁ , λ ₉ and λ ₁₃ are input to the four input ports of the optical switch 34-5 in addition to the wavelength λ ₅ , but the four output ports of the optical switch 34-5 are Each of the wavelengths λ ₁ , λ ₉ and λ
Input ports # 2, # 3, # 4 not assigned ₁₃
And # 5, the optical signals of wavelengths λ ₁ , λ ₉ and λ ₁₃ input to the optical switch 34-5 are
5 is ignored or blocked by the arrayed waveguide grating 36 in any connected state.

Thus, only the wavelength λ ₅ needs to be considered for the optical switch 34-5. The four input ports of the optical switch 34-5 correspond to the input optical fibers 30a, 30b, 30c and 30d, respectively. When the optical switch 34-5 connects the first input port to the first output port, the input optical fiber 30a
Wavelength lambda ₅ of the optical signal from the input to the input port # 5 of the arrayed waveguide grating 36, is output from the output port # 1 of the arrayed waveguide grating 36 to the output optical fiber 38a. When the optical switch 34-5 connects the first input port to the second output port, an optical signal having the wavelength λ ₅ from the input optical fiber 30a is input to the input port # 4 of the arrayed waveguide grating 36, and The light is output from the output port # 2 of the waveguide grating 36 to the output optical fiber 38b. Hereinafter, similarly, the wavelength λ from the input optical fiber 30a is set by the optical switch 34-5.
_{The five} optical signals can be supplied to the output optical fibers 38c or 38d. That is, the four output ports of the optical switch 34-5 are output optical fibers 38a to 38d, respectively.
Corresponding to Input optical fibers 30b, 30c and 30d
The same applies to the wavelength lambda ₅ of the optical signal from.

As described above, in the present embodiment, the optical signals of any wavelengths from the four input optical fibers 30a to 30d are connected to any one of the four output optical fibers 38a to 38d. it can. Moreover, the combination of the input optical fiber and the output optical fiber to be connected can be freely selected for each wavelength.

Although the optical switches 34-1 to 34-16 cannot connect a plurality of input ports to one output port, generally, any one of the four input ports is connected to four output ports. An optical element that can be connected to any output port among the ports.

As the optical switches 34-1 to 34-16,
By using an optical switch having a more limited switch function, the embodiment shown in FIG. 1 can be operated as an add / drop element of an arbitrary wavelength. FIG. 4 shows a schematic block diagram of the optical switches 34-1 to 34-16 for that purpose.

In FIG. 4, reference numerals 40, 42 and 44 denote 2 × 2 optical switches capable of externally controlling straight connection and cross connection. Of the four input ports a, b, c, and d of the optical switches 34-1 to 34-16, the input ports a and b are connected to the two input ports of the optical switch 40, respectively.
Input ports c and d are connected to two input ports of the optical switch 42, respectively. One output port of the optical switch 40 is connected to one input port of the optical switch 44, and the other output port of the optical switch 40 is connected to the optical switches 34-1 to 34-1.
34-16 output port c. Optical switch 42
Is connected to the other input port of the optical switch 44, and the other output port of the optical switch 42 is connected to the output port d of the optical switches 34-1 to 34-16. One output port of the optical switch 44 is the optical switch 3
4-1 to 34-16, and the other output port of the optical switch 44 is connected to the optical switch 34-1 to 34-34.
Connect to -16 output port b.

The input optical fibers 30b and 30d are used for optical signals to be added, and the output optical fibers 38c and 38d are used for optical signals to be dropped. That is, the input optical fiber 30
b, 30d, an optical signal of an arbitrary wavelength to be added is input. An optical signal having the dropped wavelength is extracted from the output optical fibers 38c and 38d.

As described above, the optical switch 34-1
34-16 correspond to the input optical fibers 30a, 30b, 30c and 30d, respectively, and the output ports a and b of the optical switches 34-1 to 34-16.
b, c and d are output optical fibers 38a and 38b, respectively.
38c and 38d. Optical switches 34-1 to 34
−16 corresponds to the wavelengths λ ₁ to λ ₁₆ to be added / dropped, respectively.

The optical switches 40, 42, and 44 can independently select straight connection or cross connection. Depending on the combination, the optical switches 34-1 to 34-16 can have eight types of connection states.

For example, all the optical switches 40, 42, 4
Assuming that the input port 4 is a straight connection, as shown in FIG. 5, the input light of the input ports a and c passes through as it is and is output from the output ports a and b, respectively, and the input light from the input ports b and d is output port respectively. Output from c and d.

When the optical switches 40 and 44 are connected in a straight line and the optical switches 42 are cross-connected, the input light of the input ports a, b, c, and d is, as shown in FIG.
Output from output ports a, c, d, b. That is, the input light of the input port d is added to the output port b, and the input light of the input port c is dropped from the output port d.

When the optical switches 40 and 44 are cross-connected and the optical switch 42 is connected straight, as shown in FIG. 7, the input light at the input ports a, b, c, and d respectively becomes the output ports c, b, and a. , D. That is, the input light of the input port b is added to the output port b, the input light of the input port a is dropped from the output port c, and the input light of the input port c is added to the output port a.

Thus, the 2 × 2 optical switch 40,
By externally controlling 42 and 44, an arbitrary wavelength on the input optical fibers 30a and 30c can be dropped and an arbitrary wavelength can be added to the output optical fibers 38a and 38b.

[0041]

As can be easily understood from the above description, according to the present invention, an optical signal having an arbitrary wavelength can be freely transmitted between a plurality of input optical fibers and a plurality of output optical fibers with a small number of optical elements. Can be cross-connected. In addition, it can be realized with a small number of optical elements, and the size and cost of the device can be reduced. Further, the present invention can be applied to an optical wavelength division multiplexed signal in which a large number of wavelengths are multiplexed, and can contribute to the realization of a multi-wavelength wavelength division multiplex transmission system.

[Brief description of the drawings]

FIG. 1 is a schematic block diagram of an embodiment of the present invention.

FIG. 2 is an explanatory diagram of wavelength multiplexing / demultiplexing characteristics of arrayed waveguide gratings 32 and 36 of the present embodiment.

FIG. 3 is a detailed diagram of wiring of optical switches 34-1 to 34-16.

FIG. 4 is a schematic configuration block diagram of optical switches 34-1 to 34-16 for forming add / drop elements.

FIG. 5 is a connection example of optical switches 40, 42, and 44;

FIG. 6 is another connection example of the optical switches 40, 42, and 44;

FIG. 7 is another connection example of the optical switches 40, 42, and 44;

FIG. 8 is an explanatory diagram of a general wavelength multiplexing / demultiplexing characteristic of an arrayed waveguide grating.

FIG. 9 is a schematic block diagram of a conventional example.

[Explanation of symbols]

 10a, 10b, 10c: input optical fiber 12a, 12b, 12c: 4 × 4 arrayed waveguide grating 14, 16, 18, 20: optical switch 22a, 22b, 22c, 22d: arrayed waveguide grating 24a, 24b, 24c : Output optical fiber 30a, 30b, 30c, 30d: input optical fiber 32: arrayed waveguide grating 34-1 to 34-16: 4 × 4 optical switch 34: optical switch device 36: arrayed waveguide grating 38a, 38b, 38c , 38d: output optical fiber 40, 42, 44: 2 × 2 optical switch

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical indication location H04B 10/13 10/12 (72) Inventor Hidenori Tag 2-3-2 Nishishinjuku, Shinjuku-ku, Tokyo (72) Inventor Tetsuya Miyazaki 2-3-2 Nishi-Shinjuku, Shinjuku-ku, Tokyo, Japan Inside (72) Inventor Yukio Horiuchi 2-3-3, Nishi-Shinjuku, Shinjuku-ku, Tokyo No. 2 International Telegraph and Telephone Co., Ltd. (72) Inventor Tetsuyuki Miyagawa 2-3-2 Nishi Shinjuku, Shinjuku-ku, Tokyo (72) Inventor Shigeyuki Akiba 2 Nishi-Shinjuku, Shinjuku-ku, Tokyo 3-3-2 International Telegraph and Telephone Corporation

Claims (8)

[Claims] 1. An n-input / n-output first and second arrayed waveguide grating capable of periodically and repeatedly outputting n wavelengths at wavelengths at fixed intervals, and the first and second array waveguides. M inputs and m outputs connected between waveguide gratings (where m × m
.Ltoreq.n), the input light transmitting means being connected to m input ports at m intervals among the n input ports of the first arrayed waveguide grating. Connecting the n output ports of the first arrayed waveguide grating to the input ports of the optical switch means corresponding to the wavelengths that can be output from each of the output ports; An output light transmitting means is connected to each of the m output ports, and the m output ports of each of the optical switch means are set to the wavelength corresponding to the optical switch means by the wavelength of the second arrayed waveguide grating. An optical cross-connect device connected to an input port of the second arrayed waveguide grating that outputs from m output ports. 2. The optical cross-connect device according to claim 1, wherein an optical signal to be added is input to some of said plurality of input light transmitting means, and said plurality of output light transmitting means is provided. An add / drop device, wherein an optical signal to be dropped is extracted from any of the devices. 3. An arbitrary wavelength of k1 inputs is represented by k
An optical cross-connect device connected to an arbitrary output among two outputs, comprising: k1 input ports and n output ports;
Each wavelength included in the input light, so that the same wavelength from different input ports is not output from the same output port,
Wavelength separating means for distributing the output to n different output ports corresponding to the respective input ports; and n input ports and k2 output ports, each having a predetermined wavelength order corresponding to each of the k2 output ports. Wavelength multiplexing means for multiplexing each wavelength input to the n input ports and outputting from the k2 output ports, and a wavelength multiplexing means provided individually corresponding to the cross-connect wavelength;
Any one of the n output ports of the wavelength demultiplexing means that selects an output port capable of outputting a corresponding wavelength and supplies any of the input ports of the wavelength multiplexing means that supplies the corresponding wavelength to an output to be cross-connected. And an optical switch means for supplying the optical cross-connect to the optical cross-connect device. 4. The optical cross-connect device according to claim 3, wherein k1 = k2. 5. The optical cross-connect device according to claim 3, wherein said wavelength separating means is an arrayed waveguide grating. 6. k1 <n, and said wavelength separation means:
k1 of n inputs of an n-input / n-output array waveguide grating
5. The optical cross-connect device according to claim 3, wherein an input is used. 7. The optical cross multiplexer according to claim 3, wherein said wavelength multiplexing means is an arrayed waveguide grating.
Connect device. 8. k2 <n, and said wavelength multiplexing means:
k2 of n outputs of an array waveguide grating having n inputs and n outputs
The optical cross-connect device according to any one of claims 3 to 7, wherein an output is used.