WO2023177119A1

WO2023177119A1 - Dual modulation wavelength variable light source module

Info

Publication number: WO2023177119A1
Application number: PCT/KR2023/002799
Authority: WO
Inventors: 진재현; 권오기; 이철욱; 박수익
Original assignee: 주식회사 이포토닉스
Priority date: 2022-03-15
Filing date: 2023-02-28
Publication date: 2023-09-21
Also published as: KR20230134917A

Abstract

The present invention relates to a dual modulation wavelength variable light source module, and more particularly, to a dual modulation wavelength variable light source module for electrically modulating the gain of an optical gain unit separately from the modulation operation of a modulator in a light source in which the optical gain unit, a wavelength variable unit, and the modulator are integrated.

Description

Dual modulation wavelength tunable light source module

The present invention relates to a dual modulation variable wavelength light source module, and more specifically, to a dual modulation method that electrically modulates the gain of the optical gain section independently of the modulation operation of the modulation section in a light source in which an optical gain section, a wavelength change section, and a modulation section are integrated into a single unit. It relates to a wavelength-tunable light source module.

Taking the prior art related to the dual modulation wavelength variable light source module of the present invention as an example, Patent Document 1, a remote base station device in an asynchronous mobile communication system processes data between the master base station and the remote base station using digital signals, and this causes the master base station and the remote base station to process data. It reduces optical transmission lines for data transmission and reception between remote base stations, restores lost signals, and increases efficiency.

In addition, Patent Document 2, an auxiliary channel transmission device and method for control management, describes the detailed structure, operation characteristics, and auxiliary management and control channel of a composite optical transmitter including a plurality of optical components. It is possible to select the application location of the AMCC transmission signal optimized for the AMCC (AMCC) signal standard.

However, the prior art has problems in that module configuration becomes complicated and manufacturing costs increase as the control signal is generated by adding a separate amplifier or variable optical attenuator to generate the control signal.

[Prior art literature]

(Patent Document 1) Registered Patent Publication No. 10-0661506 Remote base station device for asynchronous mobile communication system

(Patent Document 2) Publication of Patent No. 10-2021-0025858 Auxiliary channel transmission device and method for control management

The present invention provides a lower modulation rate and modulation index to the control signal for transmitting and monitoring the status information of the module compared to the data signal, and separates the control signal through a low-pass filter at the receiving end after transmitting the data signal and the control signal. The purpose is to provide a dual modulation wavelength variable light source module.

Another object of the present invention is to provide a dual modulation wavelength variable light source module that does not generate a control signal by adding a separate amplifier or variable optical attenuator to generate the control signal.

Another object of the present invention is to provide a dual modulation variable wavelength light source module with less signal distortion and simpler driving stage compared to a configuration that mixes and modulates a control signal in a data signal generator.

A preferred dual modulation tunable light source module of the present invention includes an adjustable modulation laser diode 31 that directly modulates an optical signal in an optical injection locking manner and performs IQ (In-phase-Quadrature) modulation necessary to create a 16-level QAM signal; The adjustable modulated laser diode 31 is controlled using a temperature sensor inside the adjustable modulated laser diode 31, a temperature control circuit using a TEC (Thermo Electric Cooler), an A/D, D/A converter, and a microprocessor. A laser diode driver (13) that provides a light source with stability and fixed output power; Tuning (14) for varying the wavelength of the oscillation mode of the adjustable modulation laser diode (31) by changing the gain by injecting current into the phase shift/modulation according to the carrier density and photoelectric effect or photothermal effect; and controlling the adjustable modulated laser diode 31, adding a control signal to the data signal at the optical signal output of the transmitter, and controlling low frequency communication, automatic wavelength selection, remote monitoring, wavelength monitoring/management, and abnormal optical link with the control signal. A transmission module (Tx) including a transmission auxiliary management control channel 15 that performs network management; and a light detector 41, which is a detector of light or other electromagnetic waves and has a PN junction for converting photons into current. a low-pass filter 42 that attenuates the frequency signal above a specific cutoff frequency at the output of the photodetector 41 and passes only the frequency signal below the cutoff frequency to separate the data signal and the control signal; and a reception auxiliary management control channel 43 that receives the control signal of the low-pass filter 42 and performs low-frequency communication, automatic wavelength selection, remote monitoring, wavelength monitoring/management, and network management of an abnormal optical link with the control signal. It is characterized in that it includes a receiving module (Rx) including ;.

Additionally, the adjustable modulated laser diode 31 includes a gain 311 for adjusting the gain; Tuning (312) for varying the wavelength of the oscillation mode of the tunable modulated laser diode (31) by changing the gain; and a modulator 313 that directly modulates the optical signal using an optical injection locking method.

In addition, detecting an error signal of the optical signal and providing the detected error signal to the tuning controller 16 so that the tuning controller 16 controls the temperature inside the adjustable modulation laser diode 31 to adjust the wavelength. It is characterized in that it further includes a locker (17).

In addition, the light detection block 63 in the receiving module (Rx) satisfies performance characteristics such as low input bias current, input current temperature drift, gain bandwidth product and output change slope, low voltage and current noise, and low input capacitance. transimpedance amplifier (62); and an avalanche photodetector 61, which is a detector of light or other electromagnetic waves, has a PN junction that converts photons into current, and uses a light avalanche.

Additionally, the transmitting module (Tx) and the receiving module (Rx) include an auxiliary management control channel control block 52, wherein the auxiliary management control channel control block 52 includes the adjustable modulation laser diode 31. A transmission auxiliary management control that adds a control signal to the data signal at the optical signal output of the transmitter and performs low-frequency communication, automatic wavelength selection, remote monitoring, wavelength monitoring/management, and network management of abnormal optical links with the control signal. channel(15); a tuning controller 16 that controls the operation of the tuning 14 according to the tuning signal of the tuning signal generator 514 performed by the microprocessor 51; A reception auxiliary management control channel 43 that receives the control signal of the low-pass filter 42 and performs low-frequency communication, automatic wavelength selection, remote monitoring, wavelength monitoring/management, and network management of an abnormal optical link with the control signal; and a microprocessor 51 that controls the operation of the transmission auxiliary management control channel 15, the tuning controller 16, and the reception auxiliary management control channel 43.

In addition, the microprocessor 51 generates control signals that perform low-frequency communication, automatic wavelength selection, remote monitoring, wavelength monitoring/management, and network management of abnormal optical links and transmits them to the transmission auxiliary management control channel 15. Control signal generator 511; A control signal receiver 512 that receives a control signal from the reception auxiliary management control channel 43 and outputs it to the control signal manager 513; Low-frequency communication, automatic wavelength selection, remote monitoring, wavelength monitoring/management, and network management of abnormal optical links are performed using the control signal of the control signal receiver 512, and a control signal is generated in the control signal generator 511. A control signal management unit 513 that commands; and a tuning signal generator 514 that generates a tuning signal and provides it to the tuning controller 16.

In addition, the tuning signal generation unit 514 includes a preamble unit 5141 that outputs an analog input sequence to be used for channel equalization; A channel equalization unit ( 5142); an encoding unit 5143 that encodes the analog input sequence of the preamble unit 5141 with reference to the channel information of the history unit 5144; A tuning signal including a history unit 5144 that stores channel information of the reception auxiliary management control channel 43 over time and transmits the channel information to the channel equalization unit 5142 and the encoding unit 5143. It is characterized in that it includes a generating unit 514.

The present invention provides a lower modulation rate and modulation index to the control signal for transmitting and monitoring the status information of the module compared to the data signal, and separates the control signal through a low-pass filter at the receiving end after transmitting the data signal and the control signal. This can have the effect of eliminating distortion in the optical signal.

In addition, the present invention can have the effect of simplifying the configuration of the module and lowering the manufacturing cost by not generating the control signal by adding a separate amplifier or variable optical attenuator to generate the control signal.

In addition, the present invention can have the effect of reducing signal distortion and simplifying the driving stage compared to a configuration in which control signals are mixed and modulated in the data signal generator.

1 is a block diagram showing the first and second embodiments of a conventional optical transmitter.

Figure 2 is a block diagram showing an embodiment of the dual modulation wavelength tunable light source module of the present invention.

Figure 3 is an exemplary diagram showing the data signal, control signal, and optical signal of the present invention.

Figure 4 is a block diagram showing the configuration of the dual modulation wavelength tunable light source module of the present invention.

Figure 5 is an exemplary diagram showing the configuration of an optical line terminal and an optical network device that constitute the optical network of the present invention.

Figure 6 is an exemplary diagram comparing the optical signal of the present invention and the conventional optical signal.

Figure 7 is a block diagram showing the configuration of the microprocessor of the present invention.

Figure 8 is an example diagram illustrating hardware resources, operating system, operation of the core control unit, and system authentication configuration that grants authority to execute control unit operations to explain the present invention.

Hereinafter, a dual modulation wavelength variable light source module according to a preferred embodiment of the present invention will be described in detail with reference to the drawings. Below, descriptions of previously known matters are omitted or simplified to clarify the gist of the present invention. The components included in the description of the present invention operate individually or in combination.

FIG. 1 is a block diagram showing a first and second embodiments of a conventional optical transmitter. Referring to FIG. 1, the first embodiment of the optical transmitter includes a modulation laser diode 11 and a variable optical attenuator/semiconductor optical amplifier. (12), the second embodiment of the optical transmitter includes a laser diode driver (13), tuning (14), transmission auxiliary management control channel (15), and control unit (16), and the second embodiment of the optical transmitter includes a mixer (21) and a multiplier (27). , a modulating laser diode 22, a transmission auxiliary management control channel 15, a laser diode driver 13, tuning 14, and a control unit 16.

In the first embodiment of the optical transmitter, the modulating laser diode 11 is used in optical communication, telecommunications and sensors, and high-power fiber laser systems, and has the IQ required to create a 16-level QAM signal by directly modulating the optical signal by optical injection locking. (In-phase-Quadrature) modulates.

The Variable Optical Attenuator (VOA)/Semiconductor Optical Amplifier (SOA) (12) predictably attenuates the optical signal according to the requirements and amplifies the optical signal directly without electrical and electro-optical conversion.

The laser diode driver (13) uses a temperature sensor inside the modulation laser diode (11), a temperature control circuit using a TEC (Thermo Electric Cooler), an A/D, D/A converter, and a microprocessor to control the modulation laser diode (11). Provides a light source with stability and fixed output power.

Tuning 14 changes the gain by injecting current into the phase shift/modulation according to carrier density and photoelectric effect or photothermal effect to change the wavelength of the oscillation mode of the modulation laser diode 11.

The transmission auxiliary management control channel 15 controls the variable optical attenuator/semiconductor optical amplifier 12, and adds a control signal to the data signal at the optical signal output of the transmitter, and provides low-frequency communication, automatic wavelength selection, and remote monitoring with the control signal. , wavelength monitoring/management, and network management of abnormal optical links.

The tuning controller 16 controls the operation of the tuning 14 according to the tuning signal from the tuning signal generator 514 performed by the microprocessor 51.

In the second embodiment of the optical transmitter, the mixer 21 is used to mix the control signal of the transmission auxiliary management control channel 15 with the output of the laser diode driver 13 driven by the data signal.

The multiplier 27 multiplies the output of the mixer 21 and the output of the laser diode driver 13 and transmits it to the modulation laser diode 22.

The modulated laser diode (22) is used in optical communications, telecommunications and sensors, and high-power fiber laser systems. It directly modulates optical signals using optical injection locking to provide the In-phase-Quadrature (IQ) modulation required to create a 16-level QAM signal. do.

The laser diode driver 13 uses a temperature sensor inside the multiplier 27, a temperature control circuit using a TEC (Thermo Electric Cooler), an A/D, D/A converter, and a microprocessor to ensure stability and fixation of the multiplier 27. Provides output power.

In the first embodiment, an over-modulation method is widely used in which a data optical signal generated from a light source is received as an input and then modulated again to include an AMCC (Auxiliary Management and Control Channel) signal. Typically, the AMCC signal is used. As the modulation speed and modulation index increase, interference with data signals increases, so the upper limit is limited, and it is usually operated at about 100 Kbps and the modulation index is 10% or less.

The second embodiment is a configuration using a pilot tone that can apply an AMCC signal without separate optical components, and simultaneously modulates a data signal and an AMCC signal (hereinafter referred to as a control signal) by using an RF mixer as a modulation light source. It is reported that there are limits to high-speed operation due to complexity due to the addition of a driver mixer and signal distortion due to non-linearity and electrical-optical non-linearity.

Figure 2 is a block diagram showing an embodiment of the dual modulation wavelength tunable light source module of the present invention. Referring to Figure 2, the optical transmitter includes an adjustable modulation laser diode 31, a laser diode driver 13, a tuning 14, It includes a transmission auxiliary management control channel 15, and the optical receiver includes an optical detector 41, a low-pass filter 42, and a reception auxiliary management control channel 43.

The tunable modulated laser diode (31) in the optical transmitter is used in optical communications, telecommunications and sensors, and high-power fiber laser systems, and directly modulates the optical signal by optical injection locking to achieve the IQ (In- phase-quadrature) modulates.

The laser diode driver 13 uses a temperature sensor inside the adjustable modulated laser diode 31, a temperature control circuit using a thermo electric cooler (TEC), an A/D, D/A converter, and a microprocessor to control the modulated laser diode ( 11) Provides a light source with stability and fixed output power.

The transmission auxiliary management control channel 15 controls the tunable modulated laser diode 31, and adds a control signal to the data signal at the optical signal output of the transmitter, and the control signal provides low-frequency communication, automatic wavelength selection, remote monitoring, and wavelength Monitoring/management and network management of abnormal optical links are performed.

In the optical receiver, the photodetector 41 is a detector of light or other electromagnetic waves and has a PN junction that converts photons into electric current. For example, photodetector 41 may be a photodiode.

The low-pass filter 42 attenuates signals with a frequency above a specific cutoff frequency and passes only frequency signals below the cutoff frequency to separate the data signal and the control signal.

The reception auxiliary management control channel 43 receives the control signal of the low-pass filter 42, and performs low-frequency communication, automatic wavelength selection, remote monitoring, wavelength monitoring/management, and network management of the abnormal optical link with the control signal.

Figure 3 is an exemplary diagram showing the data signal, control signal, and optical signal of the present invention. Referring to Figure 3, the data signal (data in) and the control signal (AMCC in) are combined to create an optical signal (optical line). Explain.

Here, the data signal is a high-speed ASK (amplitude shift keying) signal such as NRZ (non-return-to-zero) of several Gbps to tens of Gbps, and the control signal (AMCC in) has a lower speed (tens of tens of Gbps) compared to the data signal. kHz to tens of Mbps), it is desirable to drive with a low modulation index (or extinction ratio (less than 10% of the data signal), and as shown in the output optical signal (Optical line), an overmodulated signal is obtained. .

Figure 4 is a block diagram showing the configuration of the dual modulation wavelength variable light source module of the present invention. Referring to Figure 4, the dual modulation wavelength variable light source module includes a transmission module (Tx) and a reception module (Rx), and a transmission module ( Tx) includes a tunable modulated laser diode (31), a laser diode driver (13), a transmit auxiliary management control channel (15), a tuning controller (16), and a rocker (17), and the receive module (Rx) includes a light detection unit. It includes a block 63, a low-pass filter 42, a receive auxiliary management control channel 43, and a microprocessor 51, and the auxiliary management control channel control block 52 includes a microprocessor 51, a transmit auxiliary management control. It includes a channel 15, a tuning controller 16, and a reception auxiliary management control channel 43.

The tunable modulated laser diode 31 of the transmission module (Tx) consists of a gain 311, a tuning 312, and a modulator 313 (first feature), wherein the gain 311 and the tuning 312 It forms a resonance cavity, and the tuning 312 has the function of changing the wavelength of the emitted light by current/voltage injection, and the modulator 313 modulates the laser light formed in the resonator (indirect modulation). : It is characterized by modulation outside the resonator. Optical gain is generated by injecting the current of the laser diode driver 13 into the gain 311, and the control signal of the transmission auxiliary management control channel 15 is injected into the gain 311 to perform direct modulation (within the resonator). modulation) (second feature), and the tuning controller 16 is implemented based on an AS (application-specific) IC, and checks the result determined by the (wavelength) locker 17 for the signal branched from the output light to determine the current/ The output wavelength of the transmission module (Tx) can be adjusted through voltage adjustment. The receiving module (Rx) can only pass control signals through the low-pass filter 42, and can drive (transmit), check/confirm (receive), and control control signals through the microprocessor 51. It is configured to be connected to the tuning controller 16 through information to adjust/change the channel wavelength (third feature).

The tunable modulated laser diode (31) in the transmit module (Tx) is used in optical communications, telecommunications and sensors, and high-power fiber laser systems, and directly modulates optical signals with optical injection locking to create a 16-level QAM signal. (In-phase-Quadrature) modulates.

The adjustable modulated laser diode 31 includes a gain 311 that adjusts the gain, a tuning 312 that changes the wavelength of the oscillation mode of the adjustable modulated laser diode 31 by changing the gain, and an optical signal by an optical injection locking method. It includes a modulator 313 that directly modulates.

The laser diode driver (13) uses a temperature sensor inside the adjustable modulated laser diode (31), a temperature control circuit using a TEC (Thermo Electric Cooler), an A/D, D/A converter, and a microprocessor to generate an adjustable modulated laser. The diode 31 provides stability and a light source of fixed output power.

Locker 17 detects the error signal of the optical signal and provides the detected error signal to the tuning controller 16, so that the tuning controller 16 controls the temperature inside the adjustable modulation laser diode 31. Adjust the wavelength.

In the receiving module (Rx), the photodetection block 63 is a transimpedance amplifier ( 62); It is a detector of light or other electromagnetic waves, has a PN junction that converts photons into current, and includes an avalanche photodetector 61 that uses a light avalanche.

The microprocessor 51 controls the operations of the transmission auxiliary management control channel 15, the tuning controller 16, and the reception auxiliary management control channel 43.

In the auxiliary management control channel control block 52, the microprocessor 51 controls the operations of the transmission auxiliary management control channel 15, the tuning controller 16, and the reception auxiliary management control channel 43.

FIG. 5 is an exemplary diagram showing the configuration of an optical line terminal and an optical network device constituting the optical network of the present invention. Referring to FIG. 5, the optical line terminal 70 includes a transmission module (Tx) and a reception module (Rx). The optical network device 80 includes a transmission module (Tx) and a reception module (Rx).

The transmission module (Tx) and reception module (Rx) of the optical line terminal 70 and the optical network device 80 have the same configuration as the transmission module (Tx) and reception module (Rx) in FIG. 4.

The optical line terminal and optical network device that constitute the optical network of the present invention are applied to 5G PON networks. Due to the recent rapid increase in mobile data traffic, demands for efficiency in network operation management are increasing. In the case of an existing network, when a breakdown occurs, engineers must go to the site and take measures such as optical distribution. This manual management method prevents infrastructure and resources from being used efficiently. Additionally, there is a disadvantage of having to manually connect and configure the network when expanding or replacing a new network. It takes a long time to identify the location and cause of the defect.

In the present invention, channel information, power monitoring, etc. of the optical line terminal 70 and the optical network device 80 are collected and managed through an auxiliary management control channel.

The adjustable modulation laser diode 31 of the present invention is an element capable of tuning an optical channel through tuning control. When an optical module fails in the optical network device 80, it is replaced with a spare part and is connected to the auxiliary management control channel control block 52. It is automatically set to the channel of the corresponding optical network device 80.

In the operation sequence, when processing an optical module failure of the optical network device 80, the optical module failure of the optical network device 80 is recognized through the auxiliary management control channel control block 52, and the optical module is replaced or switched with a spare optical module. . The control signal is transmitted to the microprocessor 51 through I2C, and the wavelength of the corresponding channel of the laser diode is tuned through the tuning controller 16 and locker 17.

Monitoring the received optical power inputs an optical signal, detects the received power with the avalanche optical detector 61 and the transimpedance amplifier 62, and collects and manages data through the microprocessor 51.

Transmission optical power monitoring detects transmission optical power data through a transmission monitoring photo diode, transmits transmission optical power reduction data through the microprocessor 51, inputs data as a transmission gain, optical output, optical network device ( 80) Collect and manage optical power monitoring data with I2C through avalanche optical detector (61), transimpedance amplifier (62), low-pass filter (42), reception auxiliary management control channel (43), and microprocessor (51). do.

Figure 6 is an example diagram comparing the optical signal of the present invention and the conventional optical signal. Referring to Figure 6, it is explained that the optical signal of the present invention has no distortion, while the conventional optical signal has distortion 80 with a slant. do.

Figure 7 is a block diagram showing the configuration of the microprocessor of the present invention. Referring to Figure 7, the microprocessor 51 includes a control signal generator 511, a control signal receiver 512, a control signal manager 513, and tuning. Includes a signal generator 514.

The control signal generator 511 generates a control signal that performs low-frequency communication, automatic wavelength selection, remote monitoring, wavelength monitoring/management, and network management of an abnormal optical link and transmits it to the transmission auxiliary management control channel 15.

The control signal receiver 512 receives a control signal from the reception auxiliary management control channel 43 and outputs it to the control signal manager 513.

The control signal management unit uses the control signal from the control signal receiver 512 to perform low-frequency communication, automatic wavelength selection, remote monitoring, wavelength monitoring/management, and network management of abnormal optical links, and controls the control signal generator 511. Commands signal generation.

The tuning signal generation unit 514 includes a preamble unit 5141 that outputs an analog input sequence to be used for channel equalization; A channel equalization unit 5142 that receives channel information of the optical receiving end transmitted from the reception auxiliary management control channel 43 through the history unit 5144 and controls the electrical/optical conversion operation of the tuning controller 16 according to the channel information. ); an encoding unit 5143 that encodes the analog input sequence of the preamble unit 5141 with reference to the channel information of the history unit 5144; It includes a history unit 5144 that stores channel information of the reception auxiliary management control channel 43 over time and transmits the channel information to the channel equalization unit 5142 and the encoding unit 5143.

FIG. 8 is an exemplary diagram illustrating hardware resources, operating system, operation of the core control unit, and system authentication configuration for granting authority to execute control unit operations for illustrating the present invention. Referring to FIG. 8, the present invention is a processor (1). ), memory (2), input/output device (3), operating system (4), and control unit (5).

The processor (1) is a CPU (Central Processing Unit), GPU (Graphic Processing Unit), FPGA (Field Programmable Gate Array), and NPU (Neural Processing Unit), and the operating system (4) and control unit (5) mounted on the memory (2) ) executes the execution code.

Memory (2) includes permanent mass storage devices such as random access memory (RAM), read only memory (ROM), disk drives, solid state drives (SSD), flash memory, etc. can do.

The input/output device 3 is an input device, such as a camera, keyboard, microphone, mouse, etc. including an audio sensor and/or image sensor, and an output device such as a display, speaker, haptic feedback device, etc. May include devices.

The operating system 4 may include Windows, Linux, IOS, virtual machines, web browsers, and interpreters, and supports tasks, threads, timer execution, scheduling, resource management, graphics, font processing, communication, etc.

The control unit 5 determines the state based on sensor, key, touch, and mouse input of the input/output device 3 with the support of the operating system 4 and performs operations according to the determined state. The control unit 5 performs job scheduling by timers and threads using parallel execution routines.

The control unit 5 determines the state using the sensor value of the input/output device 3 and performs an algorithm according to the determined state.

Referring to Figure 8, the system authentication configuration includes a terminal 6 including a control unit 5, and an authentication server 7. The terminal 6 may be an optical line terminal 70 or an optical network device 80.

The terminal 6 duplicates the data channel, receives the key value and biometric information of the terminal 6, and requests user authentication through the first data channel to the authentication server 7, and the terminal 6 receives the generated kit value. It is displayed on the display and transmitted to the authentication server (7).

The terminal 6 inputs the kit value displayed on the display of the terminal 6 and transmits it along with the user information to the authentication server 7 through the second data channel. The terminal 6 requests the authentication server 7 to authenticate the system mounted on the terminal 6 using the kit value and user information. The kit value of the terminal 6 can be generated from computer-specific information, such as the CPU manufacturing number and the Ethernet chip number. The terminal 6 can obtain user information through face recognition using a camera, voice recognition using a microphone, and handwriting recognition using a display, and use it for authentication.

The authentication server 7 receives the kit value from the terminal 6, receives the kit value and user information from the terminal 6 through a duplicated data channel, compares the kit value and the user information of the terminal 6, and By matching, authentication for use of the system of the terminal 6 is processed. The authentication server 7 transmits the authentication result to the terminal 6 to authorize the user's use of the system. Due to the dual data channels of the terminal 6, kit value loss can be minimized.

The terminal 6, which is a means of authenticating the use of the system, does not connect directly to the system, but forms a bypass route through the authentication server 7, so that the network that makes up the Internet network is composed of an internal network and an external network, and the IP address setting process There is an advantage that the authentication process using the terminal 6 is performed smoothly in this cumbersome time. At this time, the system is mounted on the terminal 6, the terminal 6 becomes an authentication terminal means, and the authentication server 7 becomes an authentication server means.

The cloud 72 is a modularization of the container 74 with the support of the operating system 4 that manages the processor 1, memory 2, input/output device 3, and communication unit 6, and the web 8 and DB ( 9), provides the services of the protocol 10 and the library 71, and the control unit 5 executes a cloud application using the services of the container 74. A standard software package, called a container 74, bundles the application's code with associated configuration files, libraries 71, and dependencies needed to run the app.

The cloud 72 integrates control of multiple terminals 6, stores sensor values received from the terminal 6, monitors them over time, processes operation errors of the terminal 6, and sends error messages to other terminals. Notifies the terminal 6, and performs switching control on the terminal 6 that is the control target.

Neural network learning selects features from time series data collected from input devices such as temperature, altitude, fingerprints, various sensors, images, infrared cameras, and lidar, selects a model through algorithm selection, and repeats through the learning and performance verification process. Model selection is repeated through trial and error. After performance verification is completed, an artificial intelligence model is selected.

The control unit 5 performs a deep learning algorithm using a neural network to determine sensor values, uses training data to learn the neural network, and verifies the neural network performance with test data.

The present invention is not limited to the specific preferred embodiments described above, and various modifications can be made by anyone skilled in the art without departing from the gist of the invention as claimed in the claims. Of course, such changes are within the scope of the claims.

The present invention is applicable to the mobile communications industry.

Claims

A tunable modulating laser diode (31) that directly modulates the optical signal in an optical injection locking manner to achieve in-phase-quadrature (IQ) modulation;

The adjustable modulated laser diode 31 is controlled using a temperature sensor inside the adjustable modulated laser diode 31, a temperature control circuit using a TEC (Thermo Electric Cooler), an A/D, D/A converter, and a microprocessor. A laser diode driver (13) that provides a light source with stability and fixed output power;

Tuning (14) for varying the wavelength of the oscillation mode of the adjustable modulation laser diode (31) by changing the gain by injecting current into the phase shift/modulation according to the carrier density and photoelectric effect or photothermal effect; and

Controls the adjustable modulation laser diode 31, adds a control signal to the data signal at the optical signal output of the transmitter, and uses the control signal to control low-frequency communication, automatic wavelength selection, remote monitoring, wavelength monitoring/management, and abnormal optical link. A transmission module (Tx) including a transmission auxiliary management control channel 15 that performs network management; and

A photodetector 41, which is a detector of light or other electromagnetic waves and has a PN junction that converts photons into electric current;

a low-pass filter 42 that attenuates the frequency signal above a specific cutoff frequency at the output of the photodetector 41 and passes only the frequency signal below the cutoff frequency to separate the data signal and the control signal; and

A reception auxiliary management control channel 43 that receives the control signal of the low-pass filter 42 and performs low-frequency communication, automatic wavelength selection, remote monitoring, wavelength monitoring/management, and network management of an abnormal optical link with the control signal; A receiving module (Rx) including a dual modulation wavelength tunable light source module.
According to paragraph 1,

The adjustable modulated laser diode 31 is:

gain adjusting gain (311);

Tuning (312) for varying the wavelength of the oscillation mode of the tunable modulated laser diode (31) by changing the gain; and

A dual modulation wavelength tunable light source module comprising a modulator 313 that directly modulates an optical signal in an optical injection locking manner.
According to paragraph 1,

A locker ( 17) Dual modulation wavelength tunable light source module, characterized in that it further comprises;
According to paragraph 1,

The light detection block 63 in the reception module (Rx) is,

A transimpedance amplifier (62) that satisfies performance characteristics such as low input bias current, input current temperature drift, gain bandwidth product and output change slope, low voltage and current noise, and low input capacitance; and

A dual modulation wavelength variable light source module, characterized in that it includes an avalanche photodetector (61), which is a detector of light or other electromagnetic waves, has a PN junction that converts photons into current, and uses a light avalanche.
According to paragraph 1,

The transmitting module (Tx) and the receiving module (Rx) include an auxiliary management control channel control block 52, and the auxiliary management control channel control block 52 includes,

Controls the adjustable modulation laser diode 31, adds a control signal to the data signal at the optical signal output of the transmitter, and uses the control signal to control low-frequency communication, automatic wavelength selection, remote monitoring, wavelength monitoring/management, and abnormal optical link. a transmission auxiliary management control channel (15) that performs network management;

a tuning controller 16 that controls the operation of the tuning 14 according to the tuning signal of the tuning signal generator 514 performed by the microprocessor 51;

A reception auxiliary management control channel 43 that receives the control signal of the low-pass filter 42 and performs low-frequency communication, automatic wavelength selection, remote monitoring, wavelength monitoring/management, and network management of an abnormal optical link with the control signal; and

A dual modulation wavelength tunable light source comprising a microprocessor 51 that controls the operation of the transmission auxiliary management control channel 15, the tuning controller 16, and the reception auxiliary management control channel 43. module.
According to clause 5,

The microprocessor 51,

A control signal generator 511 that generates a control signal that performs low-frequency communication, automatic wavelength selection, remote monitoring, wavelength monitoring/management, and network management of an abnormal optical link and transmits it to the transmission auxiliary management control channel 15;

A control signal receiver 512 that receives a control signal from the reception auxiliary management control channel 43 and outputs it to the control signal manager 513;

Low-frequency communication, automatic wavelength selection, remote monitoring, wavelength monitoring/management, and network management of abnormal optical links are performed using the control signal of the control signal receiver 512, and a control signal is generated in the control signal generator 511. A control signal management unit 513 that commands; and

A dual modulation wavelength variable light source module comprising a tuning signal generator 514 that generates a tuning signal and provides it to the tuning controller 16.
According to clause 6,

The tuning signal generator 514,

A preamble unit 5141 that outputs an analog input sequence to be used for channel equalization;

A channel equalization unit ( 5142);

an encoding unit 5143 that encodes the analog input sequence of the preamble unit 5141 with reference to the channel information of the history unit 5144;

A tuning signal including a history unit 5144 that stores channel information of the reception auxiliary management control channel 43 over time and transmits the channel information to the channel equalization unit 5142 and the encoding unit 5143. Dual modulation wavelength variable light source module, characterized in that it includes a generator (514).