KR102404142B1 - Apparatus and method for shaping optical waveform - Google Patents

Abstract

The present invention relates to an optical waveform shaping apparatus and an optical waveform shaping method. An optical waveform shaping apparatus according to an embodiment of the present invention includes a multiplexing and demultiplexing unit for demultiplexing an optical signal multiplexed with optical signals of a plurality of wavelengths, a micro lens system for refracting the demultiplexed optical signal into parallel rays, and the and a wavelength level control unit for shaping the waveform of the optical signal, wherein the wavelength level control unit adjusts the amplitude or phase value of the demultiplexed optical signal to have a desired distribution for each cell and reflects the 2D LCoS and controls the distribution Includes controller.

Description

Optical waveform shaping apparatus and method {APPARATUS AND METHOD FOR SHAPING OPTICAL WAVEFORM}

The present invention relates to an optical communication system, and more particularly, to an optical waveform shaping apparatus and an optical waveform shaping method for regenerating optical signals by freely adjusting amplitude and phase values of optical signals.

A wavelength division multiplexing (WDM) method is being used as a core technology in the optical communication field. In the WDM system, the transmitter multiplexes optical signals having multiple wavelengths and transmits them through one optical fiber, and the receiver demultiplexes and outputs the multiplexed optical signals for each wavelength. In this case, each of the demultiplexed and output optical signals may be used separately.

In the WDM system, when a multi-channel optical signal input through one input terminal is output, a wavelength selective switch capable of freely selecting a wavelength and a path may be used. In this case, a multi-channel optical waveform molding machine may be used as a key component of the wavelength selection switch. The multi-channel optical waveform molding machine can be used not only as a wavelength selection switch having an on/off function, but also for outputting again by adjusting the power level or phase of an input wavelength.

A Bragg grating or an Arrayed Waveguide Grating (hereinafter referred to as AWG) may be used for demultiplexing/multiplexing wavelengths in the optical waveform molding machine. However, when such a device is used, there is a limitation in realizing a channel spacing having a high resolution of 10 GHz or less. In addition, there is a disadvantage in that the size of the device increases when the optical waveform modeling system is configured using the corresponding device.

An object of the present invention is to provide an optical waveform shaping apparatus and an optical waveform shaping method having high resolution.

An object of the present invention is to provide an ultra-compact optical waveform shaping apparatus.

An optical waveform shaping apparatus according to an embodiment of the present invention includes a multiplexing and demultiplexing unit for demultiplexing an optical signal multiplexed with optical signals of a plurality of wavelengths, a micro lens system for refracting the demultiplexed optical signal into parallel rays, and the 2D LCoS (Liquid Crystal on Si) for adjusting and reflecting the amplitude or phase value of the demultiplexed optical signal to have a desired distribution for each cell, respectively and a controller for controlling the distribution.

In an embodiment, the micro lens system is attached to the output of the multiplexing and demultiplexing unit.

In an embodiment, the micro lens system is attached to the 2D LCoS input terminal.

In an embodiment, the multiplexing and demultiplexing unit includes a first multiplexer and demultiplexer that separates and outputs an optical multi-channel signal into a plurality of wavelength bands, and a plurality of multiplexers and demultiplexers respectively corresponding to the plurality of wavelength bands. It includes a stacked second multiplexer and demultiplexer, wherein each multiplexer and demultiplexer divides the optical multi-channel signal of each wavelength band for each wavelength and outputs the divided.

In an embodiment, the micro lens system includes a two-dimensional micro lens array.

In an embodiment, the multiplexers and demultiplexers constituting the second multiplexer and demultiplexer are formed by a photolithography process.

In an embodiment, the multiplexers and demultiplexers constituting the second multiplexer and demultiplexer are formed by irradiating a high-power pulse laser to the optical waveguide type multiplexer and demultiplexer.

In an embodiment, the two-dimensional micro lens array is formed by a photolithography process.

In an embodiment, the two-dimensional micro lens array is formed by a nanoimprint process.

An optical waveform shaping method according to an embodiment of the present invention includes the steps of: receiving, by an optical waveform shaping apparatus, an optical signal multiplexed with optical signals of a plurality of wavelengths; demultiplexing the input optical signal in a multiplexing and demultiplexing unit; adjusting the propagation path of the demultiplexed optical signal to a parallel light beam by passing the demultiplexed optical signal through a microlens system, modifying the distribution of the optical signal in a wavelength level controller, and applying the optical signal reflected by the wavelength level controller to the microlens adjusting a propagation path to a focal beam passing through the system, multiplexing the focal beam in a multiplexing and demultiplexing unit, and outputting the multiplexed optical signal from the optical waveform shaping device.

As an embodiment, the demultiplexing step includes demultiplexing the input optical signal in a first multiplexer and demultiplexer and demultiplexing the optical signal output from the first multiplexer and demultiplexer in a second multiplexer and demultiplexer. includes steps.

As an embodiment, the multiplexing step includes multiplexing the optical signal incident from the microlens system in a second multiplexer and demultiplexer and multiplexing the optical signal output from the second multiplexer and demultiplexer in the first multiplexer and demultiplexer including the steps of

As an embodiment, the step of modifying the distribution of the optical signal includes the steps of injecting the parallel light into each cell of the 2D LCoS, transforming the distribution of the optical signal according to the distribution controlled by a controller, and the modified light and reflecting a signal from the 2D LCoS.

In an embodiment, the step of transforming the distribution includes shaping a waveform in each cell of the 2D LCoS according to distribution information of the optical signal for each cell of the 2D LCoS input to the controller.

The optical waveform shaping apparatus and optical waveform shaping method according to the present invention can implement a resolution as high as N times as high as an element having a low resolution by using a stacked structure of a multiplexer and demultiplexer.

The optical waveform shaping apparatus according to the present invention can be miniaturized by using a PIC (Photonic Integrated Circuit).

1 is a view showing the structure of an optical waveform shaping apparatus according to an embodiment of the present invention.
2 is a view showing a part of the optical waveform shaping apparatus according to an embodiment of the present invention in more detail.
3 is a diagram specifically illustrating demultiplexing in the first multiplexer and demultiplexer according to an embodiment of the present invention.
4 is a diagram specifically illustrating demultiplexing in the second multiplexer and demultiplexer according to an embodiment of the present invention.
5 is a diagram illustrating a simulation result of an optical signal propagation path in a micro lens system.
6 is a view showing the micro lens system in more detail.
7 is a diagram illustrating a simulation result of an optical signal propagation path when the micro lens system is attached to the output unit of the multiplexing and demultiplexing unit.
FIG. 8 is a view showing a result of simulating the propagation path of an optical signal when the microlens system is attached to the input part of the 2D LCoS.
9 is a diagram illustrating an example of a method of manufacturing a multiplexer and demultiplexer constituting the second multiplexer and demultiplexer.
10 is a flowchart illustrating a method for shaping an optical waveform according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described clearly and in detail to the extent that those skilled in the art can easily practice the present invention.

1 is a view showing the structure of an optical waveform shaping apparatus according to an embodiment of the present invention.

1, the optical waveform shaping apparatus 100 according to the present invention includes an input/output switch 110, a multiplexer/multiplexer unit (D/MUX Unit) 120, and a micro lens system 130. and a wavelength level control unit 160 . The wavelength level controller 160 may include a 2D liquid crystal on Si (LCoS) 140 and a controller 150 .

When an optical signal is input to the optical waveform shaping apparatus 100 , the input/output switch 110 may adjust the path of the optical signal to the multiplexing and demultiplexing unit 120 . In this case, the input/output switch 110 may close a branch of the output unit to prevent leakage of the input optical signal. When the optical signal is output from the multiplexing and demultiplexing unit 120 , the input/output switch 110 may adjust the path of the optical signal to the output unit of the optical waveform shaping apparatus 100 . In this case, the input/output switch 110 may close the branch of the input unit of the optical waveform shaping apparatus 100 in order to prevent leakage of the output optical signal. In other words, the input/output switch 110 may adjust the progress direction of the input/output optical signal through opening/closing.

The multiplexing and demultiplexing unit 120 may demultiplex the multiplexed and input optical signal. Also, the multiplexing and demultiplexing unit 120 may multiplex the demultiplexed and output optical signals. The multiplexing and demultiplexing unit 120 may be based on a PIC (Photonic Integrated Circuit). PIC is a device that integrates multiple optical functions, and is made to handle specific complex functions by integrating many devices into one chip. PIC has the advantages of being easy to transmit a lot of information, capable of processing information at high speed, and minimizing transmission loss. In addition, since the PIC has a high degree of integration, it is easy to miniaturize the device.

The micro lens system 130 may adjust the path of the optical signal in order to transmit the optical signal demultiplexed by the multiplexing and demultiplexing unit 120 to the wavelength level controller 160 . In this case, the path of the demultiplexed optical signal may be adjusted as a parallel beam in the micro lens system 130 . The microlens system 130 may adjust the path of the optical signal to transmit the optical signal output from the wavelength level controller 160 to the multiplexing and demultiplexing unit 120 . In this case, the path of the optical signal output from the wavelength level controller 160 may be adjusted to the focal ray in the micro lens system 130 .

The wavelength level controller 160 may shape and reflect the waveform of the optical signal incident through the microlens system 130 . The wavelength level controller 160 may include a 2D LCoS 140 and a controller 150 . A demultiplexed optical signal may be incident on each cell of the 2D LCoS 140 of the wavelength level controller 160 . The optical signals incident on each cell of the 2D LCoS 140 may be respectively shaped with a desired distribution. The controller 150 of the wavelength level controller 160 may control the distribution of the 2D LCoS 140 . The distribution chart controlled by the controller 150 may include amplitude or phase values of each wavelength.

According to the embodiment of FIG. 1 , a wavelength-multiplexed broadband optical signal having an arbitrary distribution may enter the input terminal of the optical waveform shaping apparatus 100 . The input optical signal may be demultiplexed and separated for each wavelength in the multiplexing and demultiplexing unit 120 . The micro lens system 130 may refract the demultiplexed optical signal into parallel rays and output the refracted light. The micro lens system 130 may be attached to the output terminal of the multiplexing and demultiplexing unit 120 or may be attached to the input terminal of the 2D LCoS 140 . The demultiplexed optical signal may be incident on each cell of the 2D LCoS 140 . An optical signal incident for each cell may be adjusted to have a desired distribution.

The light signal adjusted to have a desired distribution may be reflected from the 2D LCoS 140 . The reflected light signal may be incident back to the micro lens system 130 as a parallel light beam. The incident collimated beam may be converted into a focal beam by the micro lens system 130 and transmitted to the multiplexing and demultiplexing unit 120 . The multiplexing and demultiplexing unit 120 may wavelength-multiplex the separated optical signal and output it to the output terminal of the optical signal waveform shaping apparatus 100 .

2 is a view showing a part of the optical waveform shaping apparatus according to an embodiment of the present invention in more detail.

2 shows a multiplexing and demultiplexing unit 120 and a 2D LCoS 140 . The multiplexing and demultiplexing unit 120 may include a first multiplexer and demultiplexer 121 and a second multiplexer and demultiplexer 122 . The first multiplexer and demultiplexer 121 is a 1xN multiplexer and demultiplexer and has one input and N outputs when operating as a demultiplexer. The second multiplexer and demultiplexer 122 is a two-dimensional multiplexer and demultiplexer, in which N 1xN multiplexers and demultiplexers are stacked. A micro lens system 130 (refer to FIG. 1 ) may be additionally attached to the longitudinal section of the multiplexing and demultiplexing unit 120 from which signals are output or to the input end of the 2D LCoS 140 .

The entire wavelength band of the optical multi-channel signal may be divided into M channel intervals. The optical multi-channel signal may be divided into N wavelength bands through the first multiplexer and demultiplexer 121 . As an example, N=4 may be. The second multiplexer and demultiplexer 122 may include a stacked i-band (λ1-band, λ2-band, λ3-band, λ4-band) multiplexer and demultiplexer. The i-band multiplexer and demultiplexer can each be made separately on the same wafer. When the multiplexing and demultiplexing unit 120 is configured to include the first multiplexer and demultiplexer 121 and the second multiplexer and demultiplexer 122, the resolution of the waveform shaping apparatus 100 (refer to FIG. 1) is N can be doubled.

3 is a diagram specifically illustrating demultiplexing in the first multiplexer and demultiplexer according to an embodiment of the present invention.

The first multiplexer and demultiplexer 121 may divide wavelengths for each i-band (λ1-band, λ2-band, λ3-band, λ4-band) and output the divided wavelengths. For example, optical multi-channel signals λ1, λ2, …, λ16 with M=16 may be input and N=4. Wavelengths λ1, λ5, λ9, and λ13 may be emitted from the first output terminal out1 of the first multiplexer and demultiplexer 121 . A signal output from the first output terminal out1 may be input to λ1-band of the second multiplexer and demultiplexer 122 (refer to FIG. 2). Wavelengths λ2, λ6, λ10, and λ14 may be emitted from the second output end (out2) of the first multiplexer and demultiplexer 121 . A signal output from the second output terminal out2 may be input to the λ2-band of the second multiplexer and demultiplexer 122 . Wavelengths λ3, λ7, λ11, and λ15 may be emitted from the third output end (out3) of the first multiplexer and demultiplexer 121 . A signal output from the third output terminal out3 may be input to the λ3-band of the second multiplexer and demultiplexer 122 . The fourth output end (out4) of the first multiplexer and demultiplexer 121 may emit λ4, λ8, λ12, and λ16 wavelengths. A signal output from the fourth output terminal out4 may be input to the λ4-band of the second multiplexer and demultiplexer 122 .

4 is a diagram specifically illustrating demultiplexing in the second multiplexer and demultiplexer according to an embodiment of the present invention.

4 is an i-band (λ1-band, λ2-band, λ3-band, λ4-band) multiplexer and demultiplexer (122a, 122b, 122c, 122d) and N i-bands according to an embodiment of the present invention; It is a diagram showing that the band (λ1-band, λ2-band, λ3-band, λ4-band) multiplexers and demultiplexers 122a, 122b, 122c, 122d are stacked to form the second multiplexer and demultiplexer 122 .

As described above, referring to the embodiment of FIG. 3 , when an optical signal multiplexed with 16 wavelengths (λ1 to λ16) is input to the optical waveform shaping apparatus 100 (refer to FIG. 1 ), the first multiplexer and demultiplexer 121 , see FIG. 3 ) in each i-band (λ1-band, λ2-band, λ3-band, λ4-band) by dividing the wavelength and outputting. A signal output from the first multiplexer and demultiplexer 121 may be input to the second multiplexer and demultiplexer 122 .

Referring to FIG. 4 , λ1, λ5, λ9, and λ13 wavelengths may be multiplexed and input to λ1-band. Referring to FIG. 4 , λ1, λ5, λ9, and λ13 wavelengths may be output separately from the multiplexer and demultiplexer 122a to which λ1-band is allocated. As such, when the λ2, λ6, λ10, and λ14 wavelengths are multiplexed into the λ2-band and input, the λ2, λ6, λ10, and λ14 wavelengths can be output separately from the multiplexer and demultiplexer 122b to which the λ2-band is assigned. When the λ3, λ7, λ11, and λ15 wavelengths are multiplexed into the λ3-band and input, the λ3, λ7, λ11, and λ15 wavelengths may be separated and output in the multiplexer and demultiplexer 122c to which the λ3-band is allocated. When the λ4, λ8, λ12, and λ16 wavelengths are multiplexed into the λ4-band and input, the λ4, λ8, λ12, and λ16 wavelengths can be output separately from the multiplexer and demultiplexer 122d to which the λ4-band is assigned.

In the second multiplexer and demultiplexer 122, each of the i-bands (λ1-band, λ2-band, λ3-band, λ4-band) is assigned to N multiplexers and demultiplexers 122a, 122b, 122c, 122d) may be generally fabricated by photolithography. At this time, the N multiplexers and demultiplexers 122a, 122b, 122c, and 122d constituting each i-band (λ1-band, λ2-band, λ3-band, λ4-band) apply the same process conditions. For this reason, it is preferable to manufacture on the same wafer. When the output wavelength bands of the multiplexers and demultiplexers 122a, 122b, 122c, and 122d constituting the i-band (λ1-band, λ2-band, λ3-band, λ4-band) do not match the design value, high-power pulse Using a laser, the output wavelength band can be finely tuned. For example, in the case of a silica optical waveguide including a Ge component in a core, the core may change an effective refractive index of the core in response to a UV region. At this time, if the target sample is pre-hydrogenated, the UV light sensitivity can be increased.

5 is a diagram illustrating a simulation result of an optical signal propagation path in a micro lens system.

In more detail, FIG. 5 shows a simulation result when the micro lens system 130 (refer to FIG. 1 ) of FIG. 1 is configured with one micro lens. The demultiplexed and emitted optical signal may be converted into a parallel beam when it passes through the micro lens system 130 . Through the simulation result, it is possible to derive the condition of the micro lens to convert the emitted light signal into a parallel light beam. The conditions of the microlens for deriving parallel rays may include parameters such as a radius of curvature, a refractive index, a lens thickness, and a lens diameter. In this case, the microlens should be uniformly made of a material having the same refractive index. In addition, it must be made to have an appropriate height so that all emitted rays can be converted into parallel rays. For example, according to the simulation result of FIG. 5 , the radius of curvature of the microlens may be 0.05R. In this case, 0.05R means the degree of curvature of a circle with a radius of 0.05 mm.

6 is a view showing the micro lens system in more detail.

6 includes the arrangement of the multiplexing and demultiplexing unit 120, the micro lens system 130, and the wavelength level control unit 160 side by side in order. The micro lens system 130 may include a two-dimensional micro lens array. For the two-dimensional micro lens array, parameters such as a radius of curvature, a refractive index, a lens thickness, and a lens diameter may be determined through a simulation result as in FIG. 5 described above. When the parameters of the two-dimensional micro-lens array are determined, a two-dimensional micro-lens system can be manufactured based on the determined parameters. The two-dimensional micro lens system may be manufactured by a photolithography process method, a hot embossing process method, and a nano-imprint process method.

7 is a diagram illustrating a simulation result of an optical signal propagation path when the microlens system is attached to the output unit of the multiplexing and demultiplexing unit.

Referring to FIG. 7 , the optical signal demultiplexed at the output of the multiplexing and demultiplexing unit 120 may pass through the micro lens system 130 . The demultiplexed optical signal may pass through the micro lens array positioned at the output of the micro lens system 130 and change its path to a parallel light beam due to refraction. The parallel rays incident on the wavelength level control unit 160 may be shaped into a desired waveform by deforming the distribution. The optical signal whose waveform is modified is reflected from the 2D LCoS 140 (refer to FIG. 1 ), passes through the microlens system 130 , and then may be output through the multiplexing and demultiplexing unit 120 .

8 is a diagram illustrating a simulation result of an optical signal propagation path when the microlens system is attached to the input unit of the 2D LCoS.

Referring to FIG. 8 , the optical signal demultiplexed at the output unit of the multiplexing and demultiplexing unit 120 passes through the micro lens array located at the input unit of the micro lens system 130 and travels to a parallel beam due to refraction. can change The optical signal converted into the parallel light may pass through the micro lens system 130 and be incident on the wavelength level controller 160 . The parallel rays incident on the wavelength level control unit 160 may be shaped into a desired waveform by deforming the distribution. The optical signal whose waveform is modified is reflected from the 2D LCoS 140 (refer to FIG. 1 ), passes through the microlens system 130 , and then may be output through the multiplexing and demultiplexing unit 120 .

9 is a diagram illustrating an example of a method of manufacturing a multiplexer and demultiplexer constituting the second multiplexer and demultiplexer.

9 shows a method of manufacturing the multiplexers and demultiplexers 122a, 122b, 122c, and 122d constituting the second multiplexer and demultiplexer 122 (refer to FIG. 4) using the high-power pulsed laser 210. Referring to FIG. The high-power pulse laser 210 is uniformly irradiated to the optical waveguide type i-band (λ1-band, λ2-band, λ3-band, λ4-band) multiplexer and demultiplexer (122a, 122b, 122c, 122d) This can change the output spectral characteristics. For example, if several multiplexers and demultiplexers 122a having the same λ1-band wavelength band are manufactured on the same wafer, and a high-power pulse laser 210 is uniformly irradiated to one of them under suitable conditions, the λ1-band wavelength band A multiplexer and demultiplexer 122a having a λ2-band wavelength band can be fabricated as a multiplexer and demultiplexer 122b. If the multiplexer and demultiplexer 122a having another λ1-band wavelength band is uniformly irradiated with a high-power pulse laser 210 under another suitable condition, a multiplexer and demultiplexer 122c having a λ3-band wavelength band can be manufactured. have. In the same way, a multiplexer and demultiplexer 122d having a λ4-band wavelength band can also be manufactured. Through this process procedure, N multiplexers and demultiplexers constituting the second multiplexer and demultiplexer 122 can be manufactured.

10 is a flowchart illustrating a method for shaping an optical waveform according to an embodiment of the present invention.

In step S110 , an optical signal having a plurality of wavelengths may be input through an input unit of the optical waveform shaping apparatus 100 (refer to FIG. 1 ). The input optical signal may be input to the multiplexing and demultiplexing unit 120 (refer to FIG. 1) through the input/output switch 110 (refer to FIG. 1). In this case, the input/output switch 110 may close the output branch of the optical waveform shaping apparatus 100 .

In step S120 , the input optical signal may be separated for each wavelength and demultiplexed. For example, the multiplexing and demultiplexing unit 120 may include a first multiplexer and demultiplexer 121 (see FIG. 2 ) and a second multiplexer and demultiplexer 122 (see FIG. 2 ). An optical signal including a plurality of wavelengths input to the multiplexing and demultiplexing unit 120 may be input to the first multiplexing and demultiplexing unit 121 to be separated into N beams and output. Each ray may contain multiple wavelengths. The second multiplexer and demultiplexer 122 may have a structure in which N multiplexers and demultiplexers are stacked. The N light rays output from the first multiplexer and demultiplexer 121 may be input to each layer of the second multiplexer and demultiplexer 122 . Each light beam input to each layer of the second multiplexer and demultiplexer 122 may be divided into a plurality of light beams and output. Through the above-described series of processes, resolution as high as N times can be realized.

In step S130 , the demultiplexed optical signal output from the multiplexing and demultiplexing unit 120 may be refracted while passing through the microlens system 130 (refer to FIG. 1 ). The refracted light signal may be directed to a parallel beam.

In step S140 , the parallel light output from the micro lens system 130 may be incident to the wavelength level controller 160 (refer to FIG. 1 ). The wavelength level controller 160 may include a 2D LCoS 140 (refer to FIG. 1) and a controller 150 (refer to FIG. 1). The 2D LCoS 140 may be positioned at the input terminal of the wavelength level controller 160 . Accordingly, the demultiplexed parallel rays may be incident on each cell of the 2D LCoS 140 . Each of the parallel rays incident on each cell of the 2D LCoS 140 may be transformed into a desired distribution. The distribution may include the amplitude and phase of the signal. The controller 150 may control a waveform distribution in each cell of the 2D LCoS 140 . The optical signal molded to a desired distribution may be reflected and output from the 2D LCoS 140 . In this case, the reflected light signal may be a parallel light beam.

In step S150 , the parallel beam reflected and output from the 2D LCoS 140 may be incident on the micro lens system 130 . The parallel rays passing through the micro lens system 130 may be directed to a focal ray.

In step S160 , the focal ray output from the micro lens system 130 may be multiplexed into one ray by the multiplexing and demultiplexing unit 120 . The multiplexing and demultiplexing unit 120 operating as a demultiplexer in step S120 may operate as a multiplexer in step S180 to multiplex a plurality of beams into one beam.

The optical signal multiplexed in step S170 may be output to the output unit of the waveform shaping apparatus 100 and transmitted.

Since the optical waveform shaping apparatus according to the present invention uses the second multiplexer and demultiplexer 122 (refer to FIG. 2) as described above, an optical waveform shaping apparatus having a resolution N times higher than that of an element having a low resolution can be realized. can In addition, if devices with multiple functions are integrated based on PIC, a high-density and ultra-small multi-channel optical signal waveform modeling device can be realized. The present invention can be utilized not only as a multi-channel optical signal waveform shaping device, but also as a wavelength selection switch for WDM optical communication or an optical signal generator having an arbitrary waveform.

The above are specific embodiments for carrying out the present invention. The present invention will include not only the above-described embodiments, but also simple design changes or easily changeable embodiments. In addition, the present invention will include techniques that can be easily modified and implemented using the embodiments. Therefore, the scope of the present invention should not be limited to the above-described embodiments, but should be defined by the claims described below as well as the claims and equivalents of the present invention.

100: optical waveform shaping device
110: input/output switch
120: Multiplexing and demultiplexing unit (Demultiplexer/Multiplexer Unit, D/MUX Unit)
130: micro lens system
140: 2D LCoS
150: controller
160: wavelength level control

Claims (15)

a multiplexing and demultiplexing unit for demultiplexing an optical signal multiplexed with optical signals of a plurality of wavelengths;
a micro lens system that refracts the demultiplexed optical signal into parallel rays; and
and a wavelength level controller for shaping the waveform of the optical signal,
The wavelength level control unit includes a 2D LCoS for adjusting and reflecting the amplitude or phase value of the demultiplexed optical signal to have a desired distribution for each cell, and a controller for controlling the distribution. The method of claim 1,
and the micro lens system is attached to an output unit of the multiplexing and demultiplexing unit. The method of claim 1,
The micro lens system is an optical waveform modeling device attached to the 2D LCoS input terminal. The method of claim 1,
The multiplexing and demultiplexing unit comprises:
a first multiplexer and demultiplexer that separates and outputs the optical multi-channel signal into a plurality of wavelength bands; and
a second multiplexer and demultiplexer in which a plurality of multiplexers and demultiplexers respectively corresponding to the plurality of wavelength bands are stacked;
Each multiplexer and demultiplexer is an optical waveform shaping device that divides the optical multi-channel signal of each wavelength band by wavelength and outputs it. The method of claim 1,
The micro-lens system is an optical waveform shaping device including a two-dimensional micro-lens array. 5. The method of claim 4,
The multiplexer and demultiplexer constituting the second multiplexer and demultiplexer are formed by a photolithography process. 5. The method of claim 4,
The multiplexer and demultiplexer constituting the second multiplexer and demultiplexer are formed by irradiating a high-power pulse laser to the optical waveguide type multiplexer and demultiplexer. 6. The method of claim 5,
The two-dimensional micro lens array is an optical waveform shaping device formed by a photolithography process. 6. The method of claim 5,
The two-dimensional micro lens array is an optical waveform shaping apparatus formed by a hot embossing process. 6. The method of claim 5,
The two-dimensional micro lens array is an optical waveform shaping apparatus formed by a nanoimprint process. receiving, by an optical waveform shaping apparatus, an optical signal multiplexed with optical signals of a plurality of wavelengths;
demultiplexing the input optical signal in a multiplexing and demultiplexing unit;
adjusting the propagation path of the demultiplexed optical signal to a parallel beam by passing it through a micro lens system;
modifying the distribution of the optical signal in a wavelength level controller;
adjusting a propagation path of the optical signal reflected by the wavelength level controller to a focal beam by passing the micro-lens system;
multiplexing the focal ray in a multiplexing and demultiplexing unit; and
and outputting the multiplexed optical signal from the optical waveform shaping apparatus. 12. The method of claim 11,
The demultiplexing step is:
demultiplexing the input optical signal in a first multiplexer and demultiplexer; and
and demultiplexing the optical signal output from the first multiplexer and demultiplexer in a second multiplexer and demultiplexer. 12. The method of claim 11,
The multiplexing step is:
multiplexing the optical signal incident from the micro lens system in a second multiplexer and demultiplexer; and
and multiplexing the optical signal output from the second multiplexer and demultiplexer in a first multiplexer and demultiplexer. 12. The method of claim 11,
The step of modifying the distribution of the optical signal includes:
irradiating the parallel rays to each cell of the 2D LCoS;
modifying the distribution of the optical signal according to the distribution controlled by the controller; and
and reflecting the deformed optical signal from the 2D LCoS. 15. The method of claim 14,
The step of transforming the distribution of the optical signal according to the distribution controlled by the controller includes:
and modeling a waveform in each cell of the 2D LCoS according to distribution map information of the optical signal for each cell of the 2D LCoS input to the controller.

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