JPH09261206A - Optical wavelength multiplex signal receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a receiver for an optical wavelength multiplex signal by correcting automatically a branching circuit of a branching means so as to obtain an excellent reception characteristic. SOLUTION: Two output electric signals from a photoelectric converter 3-1 to receive an optical signal λ1 with a shortest wavelength and an optical signal λ4 with a longest wavelength are monitored among plural photoelectric converters (3-1, 3-2, 3-3, 3-4) receiving respectively optical signals (λ1, λ2, λ3, λ4) demultiplexed and outputted from a demultiplexer means 2. Then the demultiplexer means 2 is adjusted by demultiplexer automatically control means 4 so that the two signals of the shortest wavelength λ1 and the longest wavelength λ4 or either of them are given respectively to the prescribed photoelectric converters 3-1, 3-4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical wavelength division multiplexing signal receiving apparatus, and more specifically to an optical wavelength division multiplexing signal receiving apparatus for separating and receiving an optical wavelength division multiplexing signal transmitted by multiplexing a plurality of optical signals having different wavelengths. Regarding

[0002]

2. Description of the Related Art In the optical wavelength division multiplex transmission system, optical carriers having different wavelengths are respectively modulated by individual information signals, and a plurality of these optical modulation signals (hereinafter simply referred to as optical signals) are multiplexed in a wavelength range to obtain 1 It is an optical communication system that transmits all at once using a single fiber. For example, an optical signal in which optical signals of four wavelengths λ1, λ2, λ3, and λ4 (hereinafter, λi (i = 1,2,3,4) are used to distinguish optical signals and also serve as wavelengths) are multiplexed at equal wavelength intervals. A general receiver for a WDM transmission system is H. Nakano.
Others, "10 Gb / s, 4-Channel Wavelength Division Multi
plexing Fiber Transmission Using Semiconductor Opt
ical Amplifier Mudules "(issued in April 1993 IEEE Journal
l of Lightwave Technology, Vol. 11, No. 4, pp. 612 to 617, in particular Fig. 2), the configuration is as shown in Fig. 3. The optical wavelength multiplexed signals λ1, λ2, λ3, λ4 input from the optical fiber 1 to the demultiplexing unit 2 are demultiplexed by the demultiplexing unit 2 for each wavelength. The four demultiplexed optical signals [lambda] 1, [lambda] 2, [lambda] 3, [lambda] 4 are input to photoelectric conversion means 3-1, 3-2, 3-3, 3-4, respectively.

However, the demultiplexing in the demultiplexing means 2 is not properly performed, and the respective optical signals λ1, λ2, λ3 and λ4 are respectively converted into predetermined photoelectric conversion means 3-1, 3-2, 3-3 ,.
If it is not input to 3-4, reception failure will occur. For example, the demultiplexing means 2 outputs the optical signal λ1 and the optical signal λ2.
If both are input to the photoelectric conversion means 3-1 without being separated, crosstalk between signals will occur. Further, for example, although the demultiplexing characteristic of the demultiplexing means 2 is uniformly shifted in the wavelength direction to separate the respective optical signals λ1, λ2, λ3, λ4, each of them is input to an appropriate photoelectric conversion means. Without, the optical signal λ1 is transferred to the photoelectric conversion means 3-2, and the optical signal λ2 is converted to the photoelectric conversion means 3-3.
When the optical signal λ3 is input to the photoelectric conversion means 3-4, the optical signal λ4 cannot be received. Therefore, if the initial setting value of the demultiplexing characteristic of the demultiplexing means 2 is not appropriate, or if the demultiplexing characteristic of the demultiplexing means 2 changes during the operation of the receiving device, reception failure will occur. There was a problem.

[0004]

SUMMARY OF THE INVENTION The present invention overcomes the above problems, and the initial setting value of the demultiplexing characteristic of the demultiplexing means is not appropriate, or the demultiplexing characteristic of the demultiplexing means is in operation during the operation of the receiving device. It is an object of the present invention to provide a receiving apparatus for an optical wavelength division multiplexed signal that can obtain good reception characteristics by automatically correcting the demultiplexing characteristics of the demultiplexing means even when is changed.

[0005]

To achieve the above object, the present invention provides a plurality of opto-electric conversion means for receiving each of a plurality of optical signals demultiplexed and output by a demultiplexing means for a received wavelength division multiplexed signal. In the optical wavelength division multiplexing signal receiver having the above-mentioned wavelength division means, the demultiplexing means is provided with wavelength shifting means for shifting the demultiplexing characteristics in the wavelength direction, and at least one output of the plurality of photoelectric conversion means is input to the wavelength shifting means. A demultiplexing characteristic control means for controlling the means is provided.

In a preferred embodiment of the present invention, among the opto-electric conversion means, at least an opto-electric conversion means for receiving an optical signal of the shortest wavelength and an opto-electric conversion means for receiving an optical signal of the longest wavelength. From the optical wavelength division multiplexed signal, and at least one of a plurality of optical signals of the shortest wavelength optical signal and the longest wavelength optical signal or a plurality of optical signals are respectively inputted to the predetermined photoelectric conversion means. The relative wavelength arrangement relationship of the center wavelengths of the respective wavelength bands that are input and output from the demultiplexing means is equal to the relative wavelength arrangement relationship of the respective wavelengths of the optical wavelength division multiplexed signal. The demultiplexing characteristic control means is configured to shift the demultiplexing characteristic of the demultiplexing means in the wavelength direction.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION

<First Embodiment> FIG. 1 is a block diagram showing a basic configuration of a first embodiment of an optical wavelength division multiplexing signal receiving apparatus according to the present invention.

A plurality of optical signals λ1, λ2, λ3 having different wavelengths
And λ4 (where λ1 <λ2 <λ3 <λ4) are multiplexed into the demultiplexing means 2 via the optical fiber 1. The optical wavelength division multiplexed signals λ1, λ2, λ3 and λ4 are demultiplexed by the demultiplexing means 2 into a plurality of wavelength bands and output to a plurality of optical fibers 5-1 5-2 5-3 and 5-4, respectively. It The demultiplexed optical signals λ1, λ2, λ3 and λ4 are respectively converted into a plurality of opto-electric converters 3-1, 3-2,
It is added to 3-3 and 3-4 and converted into an electric signal.
Of the electric converters 3-1, 3-2, 3-3 and 3-4,
Optoelectric converter 3-1 for receiving the shortest wavelength optical signal λ1
And the two output electrical signals from the opto-electrical converter 3-4 for receiving the longest wavelength optical signal λ4 are applied to the demultiplexing characteristic control means 4. The demultiplexing characteristic control means 4 shifts the demultiplexing characteristic of the demultiplexing means 2 in the wavelength direction by the two output electric signals. Among the optical wavelength division multiplexed signals λ1, λ2, λ3 and λ4, two signals of the optical signal λ1 of the shortest wavelength and the optical signal of the longest wavelength λ4 are input to predetermined photoelectric converters 3-1, 3-4. Further, the relative wavelength arrangement relationship of the center wavelengths of the respective wavelength bands output from the demultiplexing means 2 is equal to the relative wavelength arrangement relationship of the respective wavelengths of the optical wavelength division multiplexed signal,
The demultiplexing characteristic of the demultiplexing means 2 is controlled by the demultiplexing characteristic control means 4.

Although not shown in the figure, the outputs of the plurality of photoelectric converters 3-1, 3-2, 3-3 and 3-4 are, of course, for demodulation. It is added to the signal processing circuit. This also applies to the other embodiments.

According to the first embodiment, the relative wavelength allocation relationship of the center wavelengths of the respective wavelength bands output from the demultiplexing means 2 is always the relative wavelength allocation of the respective wavelengths of the optical wavelength division multiplexed signal. It is adjusted to be equal to the relationship. That is,
If the central wavelengths of the respective wavelength bands output from the demultiplexing means 2 are λa, λb, λc, and λd from the shortwave side, respectively, and the wavelength interval Δλxy is defined by Δλxy = λy−λx, then λab = λ1
2, the relationship of λbc = λ23 and λcd = λ34 is satisfied.

In this case, the optical signal λ of the shortest wavelength and the longest wavelength
1 and λ4 are predetermined photoelectric conversion means 3-1, 3-4
Input to, the relationship of λa = λ1 and λd = λ4 holds, but the wavelength intervals Δλ12, Δλ23, Δ of the optical wavelength division multiplexed signal are
Intervals between λ34 and the output wavelength bands of the demultiplexing means 2 Δλab, Δλ
Since bc and Δλcd are equal, λb = λ2 and λ
The relationship of c = λ3 is also established, and the optical signals λ2 and λ4 are automatically input to the predetermined photoelectric converters 3-2 and 3-3.

Therefore, when the receiver is started up, the demultiplexing means 2 is so arranged that the optical signals λ1 and λ4 having the shortest wavelength and the longest wavelength are input to the predetermined opto-electric converters 3-1 and 3-4, respectively. By controlling the demultiplexing characteristic, the demultiplexing characteristic of the demultiplexing means is set appropriately. Once the demultiplexing characteristic of the demultiplexing means 2 is properly set, if only one wavelength is input to a predetermined photoelectric converter after that, λab = λ12 and λbc = λ.
23, and as long as the relationship of λcd = λ34 is satisfied, all the optical signals λ1, λ2, λ3, and λ4 have predetermined photoelectric conversion means 3-1 and 3
-Continue to be input to 2, 3-3, 3-4. Therefore, while the receiving device is receiving, the demultiplexing characteristic of the demultiplexing means 2 is set so that the optical signal of the shortest wavelength λ1 (or the longest wavelength λ4) is input to the predetermined opto-electric converter 3-1 or 3-4. By controlling, the appropriate demultiplexing characteristic of the demultiplexing means 2 is maintained.

<Second Embodiment> FIG. 2 is a block diagram showing a basic configuration of a second embodiment of the optical wavelength division multiplexing signal receiver according to the present invention. Multiple optical signals with different wavelengths λ
An optical wavelength multiplexed signal obtained by multiplexing 1, λ2, λ3 and λ4 is input to the demultiplexing means 2 via the optical fiber 1. The optical wavelength multiplexed signals λ1, λ2, λ3 and λ4 are demultiplexed by the demultiplexing means 2 into a plurality of wavelength bands, and a plurality of optical fibers 5 are respectively provided.
-1, 5-2, 5-3 and 5-4. The demultiplexed optical signals λ1, λ2, λ3 and λ4 are added to the plurality of opto-electric converters 3-1, 3-2, 3-3 and 3-4, respectively, and converted into electric signals. The demultiplexing characteristic control means 4 receives the output electric signals from the photoelectric converters 3-1, 3-2, 3-3 and 3-4 as input, and shifts the demultiplexing characteristic of the demultiplexing means 2 in the wavelength direction. Configured to let. That is, the demultiplexing characteristic control means 4 causes the demultiplexed optical wavelength division multiplexed signals λ1, λ2,
λ3 and λ4 are predetermined photoelectric converters 3-1 and 3-, respectively.
2, 3-3 and 3-4 so as to be input to the demultiplexing means 2
Control the demultiplexing characteristics of.

According to the second embodiment, each optical signal λ
1, λ2, λ3 and λ4 photoelectric converters 3-1, 3-2,
Since the input state to 3-3 and 3-4 is fed back to change the demultiplexing characteristic of the demultiplexing means 2, each optical signal λ1, λ2, λ3 and λ4 is always a predetermined photoelectric converter 3-1. Three
2, 3-3 and 3-4. Therefore, even if the initial setting value of the demultiplexing characteristic of the demultiplexing means 2 is not appropriate or the demultiplexing characteristic of the demultiplexing means 2 changes during the receiving operation of the receiving apparatus, the demultiplexing means of the demultiplexing means 2 It is possible to automatically correct the characteristics and obtain good reception characteristics.

<Third Embodiment> FIG. 4 is a block diagram showing the configuration of the third embodiment of the optical wavelength division multiplexing signal receiver according to the present invention. Four wavelengths λ1, λ2, λ3 and λ4 (where λ1 <λ2 <λ3 <λ4) are equal wavelength intervals Δλ
The optical wavelength division multiplexed signal is input to the demultiplexer 12 via the input port 15 by the optical fiber 11. As will be described in detail below, in the demultiplexer 12, the optical wavelength division multiplexed signal is demultiplexed for each wavelength λ1, λ2, λ3, and λ4, and the photodiodes 13-
1, 13-2, 13-3 and 13-4.

The demultiplexer 12 is a diffraction grating type demultiplexer,
The optical wavelength division multiplexed signal input from the input port 15 passes through the optical lens 16, is reflected by the diffraction grating plate 17 at a reflection angle according to the wavelength, passes through the optical lens 16 again, and has a short wavelength λ.
Output ports 19-1 and 19- in order from the output band on the 1st side
2, 19-3 and 19-4. The intervals of the center wavelengths of the respective wavelength bands output from the adjacent output ports (for example, 19-1 and 19-2) are designed to be equal intervals Δλ, and the angle θ of the diffraction grating plate 17 is set.
Is varied by the rotation driving device 18, so that each wavelength band is uniformly shifted in the short wavelength direction or the long wavelength direction. Therefore, if the central wavelength of the wavelength band output from the output port 19-1 is λ0, the central wavelengths of the wavelength bands output from the output ports 19-2, 19-3 and 19-4 are λ0 + Δλ and λ0 + 2Δλ, respectively.
And λ0 + 3Δλ.

Photodiodes 13-1, 13-2, 1
Two monitor signals output from the photodiode 13-1 for receiving the optical signal λ1 of the shortest wavelength and the photodiode 13-4 for receiving the optical signal λ4 of the longest wavelength of 3-3 and 13-4 Is input to the demultiplexing characteristic control circuit 14. The demultiplexing characteristic control circuit 14 controls the angle θ of the diffraction grating plate 17 in the demultiplexer 12 according to the monitor signals from the photodiodes 13-1 and 13-4.

In the receiving apparatus of FIG. 4, when the receiving apparatus is started up, the demultiplexing characteristic control circuit 14 is operated by the following algorithm to initially adjust the demultiplexing characteristic of the demultiplexer 12. First, the angle (θ) of the diffraction grating plate 17 is arbitrarily changed so that the optical signal is input to at least one of the photodiodes 13-1 and 13-4. Photodiode 13-
When the optical signal λ1 is input to 1, the photodiode 13
An optical signal having a wavelength of λ1 + 3Δλ, that is, an optical signal λ4 is input to -4. Therefore, the photodiode 13-1
And 13-4, the optical signals are input to both of them, and at this time, the optical signals whose wavelengths are (λ1 + Δλ) and (λ1 + 2Δλ) are input to the photodiodes 13-2 and 13-3, respectively.
That is, the optical signals λ2 and λ3 are input. Therefore, when an optical signal is input to both the photodiodes 13-1 and 13-4, the demultiplexing characteristic of the demultiplexer 12 becomes appropriate.

When an optical signal is input only to the photodiode 13-1, since the optical signal is either λ2, λ3 or λ4, the diffraction grating plate 17 in the direction in which the demultiplexing characteristic shifts to the short wavelength side. Is rotated to input another optical signal to the photodiode 13-1. Conversely, the photodiode 13-
When the optical signal is input only to 4, the optical signal is λ1 or λ2
Either .lambda.3 or .lambda.3, the diffraction grating plate 17 is rotated in the direction in which the demultiplexing characteristic shifts to the long wavelength side. By repeating the above process until an optical signal is input to both the photodiodes 13-1 and 13-4, the demultiplexing characteristic of the demultiplexer 12 becomes appropriate. By controlling the demultiplexing characteristic of the demultiplexer 12 by the above algorithm, the respective optical signals λ1, λ2, λ3, λ4 are respectively converted into predetermined photodiodes 13-1, 13-2, 13-3 and 13-. 4 is input, and the initial adjustment when the receiving device is started up is completed.

Further, once the receiver is started up, the demultiplexing characteristic of the demultiplexer 12 is maintained so that the optical signal of an arbitrary one wavelength is continuously input to the predetermined photodiode 13 during the operation of the receiver thereafter. By continuing the operation, the remaining optical signal is also continuously input to the predetermined photodiode 13.
Therefore, when the receiving device is in operation, the photodiode 13-1
Alternatively, the demultiplexing characteristic of the demultiplexing device 12 may be maintained so that the predetermined optical signal λ1 or λ4 is continuously input to either one of the photodiodes 13-4.

<Fourth Embodiment> FIG. 5 is a block diagram showing the configuration of a fourth embodiment of the optical wavelength division multiplexing signal receiver according to the present invention. In this embodiment, the demultiplexing means is composed of a demultiplexing element composed of a multi-electrode Mach-Zehnder interferometer. In FIG. 5, the same functional parts as those in FIG. 4 are designated by the same reference numerals and detailed description thereof will be omitted. In this embodiment, each electrode 20-
By varying the control signal applied to 1, 20-2, 20-3, each output port 19-1, 19-2, 19-
The wavelength bands output from 3 and 19-4 are adjusted,
Each output port 19-1, 19-2, 19-3 and 19-
By applying the algorithm in FIG. 4 under the condition that the wavelength interval between the wavelength bands output from the optical fiber 4 is always maintained at Δλ, each optical signal can be input to a predetermined photodiode. That is, the central wavelengths of the wavelength bands output from the output ports 19-1, 19-2, 19-3, and 19-4 are (λ0, λ0 + Δλ,
λ0 + 2Δλ, λ0 + 3Δλ) under the control condition that satisfies the relationship of
The duplexer 12 is properly adjusted by monitoring the signal from 4 and adjusting the duplexer 2.

<Fifth Embodiment> FIG. 6 is a block diagram showing the configuration of a fifth embodiment of the optical wavelength division multiplexing signal receiver according to the present invention. The present embodiment is in principle the same as the optical wavelength division multiplexing signal receiver shown in FIG. As shown in the figure, a part of the outputs of all the photodiodes 13-1, 13-2, 13-3 and 13-4 is monitored to control the demultiplexer 12. In this case, the adjustment method is to add identification information for distinguishing each optical signal λ1, λ2, λ3, and λ4 to the signal, and then add each photodiode 13-
1, 13-2, 13-3 and 13-4 are collectively monitored and the control signal applied to each electrode 20-1, 20-2, 20-3 is varied to adjust the demultiplexing characteristic of the demultiplexer 12. And the optical signal is sequentially transmitted individually, and the control signal applied to the corresponding photoelectrode, for example, signal λ1 to 19-1 and 19-2 is changed to change the demultiplexing characteristic of the demultiplexer 12. There is a method of sequentially performing adjustment.

<Sixth Embodiment> FIG. 7 is a block diagram showing the configuration of a sixth embodiment of the optical wavelength division multiplexing signal receiver according to the present invention. In principle, this embodiment is the same as the optical wavelength division multiplexing signal receiver shown in FIG. The present embodiment does not have a configuration in which all optical signals are collectively demultiplexed, but the demultiplexing means 2 is such that the optical wavelength division multiplexed signal is once distributed by the optical coupler 21 as shown in FIG. −
Each of the optical signals is selected and extracted by using 1, 22-2, 22-3 and 22-4. In this case, the center wavelengths of the wavelength bands output from the optical filters 22-1, 22-2, 22-3 and 22-4 are (λ0, λ0 + Δ
[lambda], [lambda] 0 + 2 [Delta] [lambda], [lambda] 0 + 3 [Delta] [lambda]) under the control conditions that satisfy the relationship.
The demultiplexer can be properly adjusted by monitoring the output signal from the device and adjusting the demultiplexer.

<Seventh Embodiment> FIG. 8 is a diagram showing the configuration of a seventh embodiment of an optical wavelength division multiplexing signal receiver according to the present invention. In principle, this embodiment is the same as the optical wavelength division multiplexing signal receiver shown in FIG. As shown in FIG. 8, all the photodiodes 13-1, 13-2, 13-3 and 13-
4 and monitors each optical filter 22-1, 22-2, 22
-3 and 22-4 are individually controlled to adjust the duplexer.

In the above-described embodiment, an example of a signal in which four optical wavelength-multiplexed signals are multiplexed at equal wavelength intervals has been described in order to simplify the description, but the present invention is not limited to the above-described embodiment. The present invention can be applied to an optical wavelength-division multiplexed signal of an arbitrary multiplex number of 2 or more, and even if the wavelength intervals between the multiplexed signals are unequal intervals, as described in the first and second embodiments. It is feasible. Furthermore, the present invention can be implemented by controlling the operating temperature even in a wavelength demultiplexing element in which the demultiplexing characteristic shifts in the wavelength direction depending on the operating temperature.

[0026]

According to the present invention as described above,
The initial setting value of the demultiplexing characteristic of the demultiplexing means is not appropriate,
Even if the demultiplexing characteristic of the demultiplexing means is changed during operation of the receiving apparatus, a receiving apparatus for an optical wavelength division multiplexed signal capable of automatically correcting the demultiplexing characteristic of the demultiplexing means to obtain a good receiving characteristic is provided. Since it can be provided, it is very effective for improving the reliability of the optical wavelength division multiplexed signal receiver.

[Brief description of drawings]

FIG. 1 is a block diagram showing a basic configuration of a first embodiment of an optical wavelength division multiplexing signal receiver according to the present invention.

FIG. 2 is a block diagram showing a basic configuration of a second embodiment of an optical wavelength division multiplexing signal receiver according to the present invention.

FIG. 3 is a block diagram showing a configuration of a conventional optical wavelength division multiplexing signal receiver.

FIG. 4 is a block diagram showing a configuration of a third embodiment of an optical wavelength division multiplexing signal reception device according to the present invention.

FIG. 5 is a block diagram showing a configuration of a fourth embodiment of an optical wavelength division multiplexing signal receiver according to the present invention.

FIG. 6 is a block diagram showing a configuration of a fifth embodiment of an optical wavelength division multiplexing signal receiver according to the present invention.

FIG. 7 is a block diagram showing a configuration of a sixth embodiment of an optical wavelength division multiplexing signal receiver according to the present invention.

FIG. 8 is a block diagram showing a configuration of a seventh embodiment of an optical wavelength division multiplexing signal receiver according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1: Optical fiber 2: Demultiplexing means 3-1, 3-2, 3-3, 3-4: Photoelectric conversion means 4: Control means of demultiplexing characteristics of demultiplexing means 11: Optical fiber 12: Demultiplexing 13-1, 13-2, 13-3, 13-4: Photodiode 14: Control means for demultiplexing characteristics of demultiplexer 15: Input port of demultiplexer 16: Lens 17: Diffraction grating plate 19- 1, 19-2, 19-3, 19-4: Output ports 20-1, 20-2, 20-3 of duplexer: Electrodes of Mach-Zehnder interference system 21: Optical couplers 22-1, 22-2, 22 -3, 22-4: Optical filter

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location H04B 10/14 10/04 10/06

Claims (6)

[Claims] 1. A demultiplexing unit for inputting an optical wavelength division multiplexed signal in which a plurality of optical signals having different wavelengths are multiplexed and demultiplexing into a plurality of wavelength bands to obtain a demultiplexed output, and each of the demultiplexed output lights. In the optical wavelength division multiplexing signal receiving device having a plurality of opto-electric conversion means for respectively receiving signals, the demultiplexing means has a wavelength shift means for shifting demultiplexing characteristics in the wavelength direction, and the plurality of opto-electric conversion means. 2. An optical wavelength division multiplexing signal receiving device, characterized in that it has demultiplexing characteristic control means for controlling the wavelength shift means by receiving at least one output of the above. 2. The optical wavelength division multiplexing signal receiving device according to claim 1, wherein said demultiplexing characteristic control means receives the optical signal of the shortest wavelength among said plurality of photoelectric conversion means. In response to the two output electrical signals from the means and the optical-electrical converting means for receiving the optical signal of the longest wavelength, one of the two signals, the optical signal of the shortest wavelength and the optical signal of the longest wavelength, of the optical wavelength division multiplexed signals. At least one signal is input to the predetermined photoelectric conversion means, and the relative wavelength arrangement relationship of the center wavelengths of the respective wavelength bands output from the demultiplexing means is equal to each wavelength of the optical wavelength division multiplexed signal. An optical wavelength division multiplexing signal receiving device having a demultiplexing characteristic control unit for controlling the demultiplexing characteristic of the demultiplexing means so as to be equal to a relative wavelength arrangement relationship. 3. The optical wavelength division multiplexing signal receiving apparatus according to claim 2, wherein the demultiplexing means receives a diffraction wavelength division plate on which the optical wavelength division multiplexing signal is incident, and a rotation driving device for rotating the diffraction grating board.
It has an optical means for guiding the demultiplexed light by the diffraction grating plate to the plurality of photoelectric conversion means, and the demultiplexing characteristic control unit is a device for generating a drive signal of the rotation drive device. Optical wavelength division multiplexing signal receiver. 4. The optical wavelength division multiplexing signal receiving apparatus according to claim 1, wherein the demultiplexing characteristic control means inputs the output signals of the plurality of photoelectric conversion means, and each of the optical wavelength division multiplexing signals has a predetermined value. An optical wavelength division multiplexing signal receiving device having a demultiplexing characteristic control section for controlling the wavelength shifting means of the demultiplexing means so as to be inputted to the photoelectric conversion means. 5. The optical wavelength division multiplexing signal receiver according to claim 2 or 4, wherein said demultiplexing means is composed of a demultiplexing element composed of a multi-electrode Mach-Zehnder interference system, and said demultiplexing characteristic control section is said Mach-Zehnder. An optical wavelength division multiplexing signal receiving device, characterized in that it is configured to control an electrode voltage of a demultiplexing element composed of an interference system. 6. The optical wavelength division multiplexed signal receiving apparatus according to claim 2 or 4, wherein said demultiplexing means divides said optical wavelength division multiplexed signal into a plurality of optical couplers, and a plurality of optical couplers to which the distributed optical signals are respectively inputted. An optical wavelength division multiplexing signal receiving device comprising an optical filter, wherein the demultiplexing characteristic control unit is configured to control the characteristics of the plurality of optical filters.