Systems, methods, and computer program products for recovery of transmission system failures in optical communications networks

Abstract

Systems, methods, and computer program products for recovery of transmission system failures in optical communications networks are disclosed. A system for recovery of a transmission system failure may include at least one processor programmed or configured to identify a presence of a reduction in power in an optical transmission band of a plurality of optical transmission bands of an optical communication network; determining a cause of a decrease in power in the optical transmission band based on identifying the presence of the decrease in power in the optical transmission band; and performing an action of correcting a reduction in power in the optical transmission band using the optical communication light source. Methods and computer program products are also disclosed.

Description

Technical Field

[0001] The disclosed subject matter relates generally to fiber optic communications and, in some non-limiting embodiments, to systems, methods, and computer program products for restoration of transmission system failures in optical communications networks. Background Art

[0002] Optical communication (e.g., optical telecommunications) may refer to a method of communication that uses light to carry information between two locations separated by a distance. An optical communication system may use a transmitter that encodes a message into an optical signal, a channel that carries the optical signal to its destination, and a receiver that reproduces the message from the optical signal received by the receiver.

[0003] Fiber optic communication may refer to a form of optical communication that involves transmitting information from one place to another by sending pulses of light (e.g., infrared light) through an optical fiber. Light may be used as a form of carrier wave that is modulated to carry information. In specific circumstances, such as when high bandwidth, long distances, and / or resistance to electromagnetic interference are required, optical fiber may be preferred over electrical cables. Fiber optic communication can transmit voice, video, data, and telemetry over a local area network or across long distances. Summary of the invention

[0004] It is therefore an object of the presently disclosed subject matter to provide systems, devices, products, and / or methods that overcome some or all of the disadvantages of the prior art.

[0005] According to a non-limiting embodiment, a system for recovery of transmission system failures is provided, comprising: at least one processor, wherein the at least one processor is programmed or configured to: identify the presence of a reduction in power in an optical transmission band among multiple optical transmission bands of an optical communication network; determine the cause of the reduction in power in the optical transmission band based on identifying the presence of the reduction in power in the optical transmission band; and perform an action to correct the reduction in power in the optical transmission band using an optical communication light source.

[0006] According to a non-limiting embodiment, a method for recovering from a transmission system failure is provided, comprising: using at least one processor to identify the presence of a reduction in power in an optical transmission band among multiple optical transmission bands of an optical communication network; using at least one processor to determine a cause of the reduction in power in the optical transmission band based on identifying the presence of the reduction in power in the optical transmission band; and using at least one processor to perform an action of correcting the reduction in power in the optical transmission band using an optical communication light source.

[0007] According to a non-limiting embodiment, a computer program product for recovery of transmission system failure is provided, the computer program product comprising at least one non-transitory computer-readable medium, the at least one non-transitory computer-readable medium comprising one or more instructions, which, when executed by at least one processor, causes the at least one processor to: identify the presence of a reduction in power in an optical transmission band among multiple optical transmission bands of an optical communication network; determine a cause of the reduction in power in the optical transmission band based on identifying the presence of a reduction in power in the optical transmission band; and perform an action to correct the reduction in power in the optical transmission band using an optical communication light source.

[0008] Further embodiments are described in the following numbered clauses:

[0009] Item 1: A system for recovery from transmission system failures, comprising: at least one processor, the at least one processor being programmed or configured to: identify the presence of a reduction in power in an optical transmission band among a plurality of optical transmission bands of an optical communication network; determine a cause of the reduction in power in the optical transmission band based on identifying the presence of the reduction in power in the optical transmission band; and perform an action to correct the reduction in power in the optical transmission band using an optical communication light source.

[0010] Clause 2: The system of clause 1, wherein, when identifying the presence of a fault in an optical transmission band among the plurality of optical transmission bands of the optical communication network, the at least one processor is programmed or configured to: identify the presence of a reduction in power in a first optical transmission band of the optical communication network based on a reading of an optical channel monitor (OCM).

[0011] Clause 3: The system of clause 1 or 2, wherein, when determining a cause of a reduction in power in an optical transmission band, the at least one processor is programmed or configured to: receive a first signal indicating a fault condition of an optical communication device of an optical communication network from a first photodiode among a plurality of photodiodes; receive a second signal indicating a fault condition of an optical communication device of the optical communication network from a second photodiode among the plurality of photodiodes; and determine an identification of the optical communication device based on the first signal and the second signal.

[0012] Clause 4: The system of any of clauses 1-3, wherein, when determining the cause of the fault, the at least one processor is programmed or configured to: determine that the optical communication device is not operating properly based on the first signal and the second signal.

[0013] Clause 5: The system of any of clauses 1-4, wherein, when performing an action of using an optical communication light source to correct a reduction in power in an optical transmission band, the at least one processor is programmed or configured to: activate a first optical switch based on a first signal and a second signal; activate a second optical switch based on the first signal and the second signal; and activate the optical communication light source based on activating the first optical switch and the second optical switch.

[0014] Clause 6: The system of any of clauses 1-5, wherein, when performing an action of using an optical communication light source to correct a reduction in power in an optical transmission band, the at least one processor is programmed or configured to: activate at least one of a wavelength selective switch (WSS) or a wavelength blocking (WB) switch based on a first signal and a second signal; and activate the optical communication light source based on activating the WSS or the WB switch.

[0015] Clause 7: The system of any of clauses 1-6, wherein, when performing an action of using an optical communication light source to correct a reduction in power in an optical transmission band, the at least one processor is programmed or configured to: perform an action of using an optical communication light source to correct a reduction in power in an optical transmission band within 50 ms of identifying the presence of a reduction in power in the optical transmission band.

[0016] Item 8: A method for recovery from a transmission system failure, comprising: using at least one processor to identify the presence of a reduction in power in an optical transmission band among multiple optical transmission bands of an optical communication network; using at least one processor to determine a cause of the reduction in power in the optical transmission band based on identifying the presence of the reduction in power in the optical transmission band; and using at least one processor to perform an action to correct the reduction in power in the optical transmission band using an optical communication light source.

[0017] Clause 9: The method of clause 8, wherein identifying the presence of a fault in an optical transmission band of the plurality of optical transmission bands of the optical communication network comprises: identifying the presence of a reduction in power in a first optical transmission band of the optical communication network based on a reading of an optical channel monitor (OCM).

[0018] Clause 10: The method of clause 8 or 9, wherein determining the cause of a reduction in power in an optical transmission band comprises: receiving a first signal indicating a fault condition of an optical communication device of an optical communication network from a first photodiode among a plurality of photodiodes; receiving a second signal indicating a fault condition of an optical communication device of the optical communication network from a second photodiode among the plurality of photodiodes; and determining the identification of the optical communication device based on the first signal and the second signal.

[0019] Clause 11: The method of any one of clauses 8-10, wherein determining the cause of the fault comprises: determining that the optical communication device is not operating normally based on the first signal and the second signal.

[0020] Clause 12: The method of any of clauses 8-11, wherein the action of using an optical communication light source to correct a reduction in power in an optical transmission band includes: activating a first optical switch based on a first signal and a second signal; activating a second optical switch based on the first signal and the second signal; and activating the optical communication light source based on activating the first optical switch and the second optical switch.

[0021] Clause 13: The method of any of clauses 8-12, wherein the action of using an optical communication light source to correct a reduction in power in an optical transmission band includes: activating at least one of a wavelength selective switch (WSS) or a wavelength blocking (WB) switch based on a first signal and a second signal; and activating the optical communication light source based on activating the WSS or the WB switch.

[0022] Clause 14: The method of any one of clauses 8-13, wherein performing an action of using an optical communication light source to correct a reduction in power in an optical transmission band includes: performing an action of using an optical communication light source to correct a reduction in power in an optical transmission band within 50ms of identifying the presence of a reduction in power in the optical transmission band.

[0023] Item 15: A computer program product for recovery from a transmission system failure, the computer program product comprising at least one non-transitory computer-readable medium, the at least one non-transitory computer-readable medium comprising one or more instructions, the one or more instructions, when executed by at least one processor, causes the at least one processor to: identify the presence of a reduction in power in an optical transmission band among a plurality of optical transmission bands of an optical communication network; determine a cause of the reduction in power in the optical transmission band based on identifying the presence of the reduction in power in the optical transmission band; and perform an action to correct the reduction in power in the optical transmission band using an optical communication light source.

[0024] Clause 16: The computer program product of clause 15, wherein the one or more instructions that cause the at least one processor to identify the presence of a fault in an optical transmission band among the multiple optical transmission bands of the optical communication network cause the at least one processor to: identify the presence of a reduction in power in a first optical transmission band of the optical communication network based on a reading of an optical channel monitor (OCM).

[0025] Clause 17: The computer program product of clause 15 or 16, wherein the one or more instructions that cause the at least one processor to determine a cause of a reduction in power in an optical transmission band cause the at least one processor to be programmed or configured to: receive a first signal indicating a fault condition of an optical communication device of an optical communication network from a first photodiode of a plurality of photodiodes; receive a second signal indicating a fault condition of an optical communication device of the optical communication network from a second photodiode of the plurality of photodiodes; and determine an identification of the optical communication device based on the first signal and the second signal.

[0026] Clause 18: The computer program product of any of clauses 15-17, wherein the one or more instructions that cause the at least one processor to determine a cause of the fault cause the at least one processor to: determine that the optical communication device is not functioning properly based on the first signal and the second signal.

[0027] Clause 19: The computer program product of any of clauses 15-18, wherein the one or more instructions causing the at least one processor to execute an action of using an optical communication light source to correct a reduction in power in an optical transmission band causes the at least one processor to: activate a first optical switch based on a first signal and a second signal; activate a second optical switch based on the first signal and the second signal; and activate the optical communication light source based on activating the first optical switch and the second optical switch.

[0028] Clause 20: The computer program product of any of clauses 15-19, wherein the one or more instructions causing the at least one processor to execute an action of using an optical communication light source to correct a reduction in power in an optical transmission band causes the at least one processor to: activate at least one of a wavelength selective switch (WSS) or a wavelength blocking (WB) switch based on a first signal and a second signal; and activate the optical communication light source based on activating the WSS or the WB switch.

[0029] These and other features and characteristics of the subject matter of the present disclosure, as well as the functions of the related elements of the methods of operation and structure and the economies of manufacturing and the combination of parts will become more apparent upon consideration of the following description and the appended claims with reference to the accompanying drawings, all of which form a part of this specification, wherein like reference numerals represent corresponding parts in the various drawings. However, it should be expressly understood that the drawings are for illustration and description purposes only and are not intended as definitions of the limitations of the disclosed subject matter. The singular forms of "a", "an", and "the" include plural referents unless the context clearly dictates otherwise. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Additional advantages and details of the disclosed subject matter are explained in more detail below with reference to exemplary embodiments illustrated in the accompanying drawings, in which:

[0031] Figure 1 is a diagram of a non-limiting embodiment of an environment in which the systems, devices, products, and / or methods described herein may be implemented according to the subject matter of the present disclosure;

[0032] Figure 2 yes Figure 1 Figures of non-limiting embodiments of components of one or more devices;

[0033] Figure 3 is a flow chart of a non-limiting embodiment of a process for recovery of a transmission system failure in an optical communications network;

[0034] Figure 4 is a diagram of a non-limiting embodiment of an amplified spontaneous emission (ASE) light source connected to a wavelength selective switch (WSS);

[0035] Figure 5 is a diagram of a non-limiting embodiment of an optical communication network according to the disclosed subject matter;

[0036] Figure 6 is a diagram of a non-limiting embodiment of an optical channel monitor (OCM) sensing device in accordance with the disclosed subject matter;

[0037] Figure 7 is a diagram of a non-limiting embodiment of an optical communication network having a plurality of reconfigurable optical add / drop multiplexer (ROADM) nodes in accordance with the presently disclosed subject matter;

[0038] Figures 8A-8B is a diagram of a non-limiting embodiment of a ROADM node and a table associated with actions for recovery from a transmission system failure of the ROADM node in accordance with the presently disclosed subject matter; and

[0039] Figures 9A-9B is a diagram of another non-limiting embodiment of a ROADM node and a table associated with actions for recovery from a transmission system failure of the ROADM node in accordance with the presently disclosed subject matter. DETAILED DESCRIPTION

[0040] For purposes of the description hereinafter, the terms "end," "upper," "lower," "right," "left," "vertical," "horizontal," "top," "bottom," "lateral," "longitudinal," and their derivatives shall relate to the disclosed subject matter as it is oriented in the accompanying drawings. However, it is to be understood that the disclosed subject matter may assume various alternative variations and step sequences unless expressly specified to the contrary. It is also to be understood that the specific devices and processes shown in the accompanying drawings and described in the following specification are merely exemplary embodiments of the disclosed subject matter. Accordingly, specific dimensions and other physical characteristics related to the embodiments disclosed herein should not be considered as limiting unless otherwise specified.

[0041] Any aspect, component, element, structure, action, step, function, instruction and / or the like used herein should not be interpreted as critical or necessary, unless clearly described as such. In addition, as used herein, the articles "one" and "an" are intended to include one or more items and can be used interchangeably with "one or more" and "at least one". In addition, as used herein, the term "set" is intended to include one or more items (for example, related items, unrelated items, combinations of related and unrelated items and / or the like) and can be used interchangeably with "one or more" and "at least one". If only one item is referred to, the term "one" or similar language is used. In addition, as used herein, the term "has", "have", "having" or the like is intended to be an open term. In addition, unless otherwise expressly stated, the phrase "based on" is intended to mean "based at least in part on".

[0042] Some non-limiting embodiments are described herein in conjunction with threshold values. As used herein, satisfying a threshold value may refer to a value greater than a threshold value, more than a threshold value, above a threshold value, greater than or equal to a threshold value, less than a threshold value, less than a threshold value, below a threshold value, less than or equal to a threshold value, equal to a threshold value, etc.

[0043] In some cases, fiber optic communications may involve the use of dense wavelength division multiplexing (DWDM), which is a fiber multiplexing technology used to increase the bandwidth of existing fiber optic communication networks. DWDM can combine data signals (e.g., signals carrying information) from different sources on a single pair of optical fibers while maintaining complete separation of the data signals. DWDM may involve the use of C-band, L-band, and other band signals. As part of this disclosure, C-band and L-band may be referenced in some non-limiting embodiments. However, this disclosure is not limited, and other bands or combinations of bands may be utilized.

[0044] When C-band and L-band signals propagate along a single optical fiber, the signals from the C-band and L-band interact, which changes the power of the signal. In some cases, stimulated Raman scattering (SRS) in the optical fiber can transfer energy from a higher frequency to a lower frequency, such as from the C-band to the L-band, and the amount of energy transferred can depend on the strength of the signal and the separation between the signals.

[0045] Solutions for SRS may involve amplification of signals from both the C-band and the L-band. In some cases, separate gain blocks (e.g., separate erbium doped fiber amplifier (EDFA) gain blocks) may be used for the design of the amplification, and due to the effects associated with changing the SRS, there may be the possibility that an outage in one band (e.g., caused by an amplifier failure and / or electrical failure) may cause problems in the other band. However, when only one band experiences an outage, problems caused on both bands may be highly undesirable, and therefore, the impact on the band that does not experience the outage is preferably brief and limited.

[0046] Non-limiting embodiments of the disclosed subject matter are directed to an optical network management system for restoration of transmission system faults, the optical network management system being programmed or configured to: identify the presence of a reduction in power in an optical transmission band among a plurality of optical transmission bands of an optical communication network; determine a cause of the reduction in power in the optical transmission band based on identifying the presence of a reduction in power in the optical transmission band; and perform an action to correct the reduction in power in the optical transmission band using an optical communication light source. In some non-limiting embodiments, when identifying the presence of a fault in an optical transmission band among the plurality of optical transmission bands of the optical communication network, the optical network management system is programmed or configured to: identify the presence of a reduction in power in a first optical transmission band of the optical communication network based on a reading of an optical channel monitor (OCM). In some non-limiting embodiments, when determining the cause of the reduction in power in the optical transmission band, the optical network management system is programmed or configured to receive a first signal indicating a fault condition of an optical communication device of the optical communication network from a first photodiode among a plurality of photodiodes, receive a second signal indicating a fault condition of an optical communication device of the optical communication network from a second photodiode among the plurality of photodiodes, and determine the identification of the optical communication device based on the first signal and the second signal.

[0047] In some non-limiting embodiments, when determining the cause of the fault, the optical network management system is programmed or configured to determine that the optical communication device is not operating normally based on the first signal and the second signal. In some non-limiting embodiments, when performing an action of using the optical communication light source to correct a reduction in power in the optical transmission band, the optical network management system is programmed or configured to activate the first optical switch based on the first signal and the second signal, activate the second optical switch based on the first signal and the second signal, and activate the optical communication light source based on activating the first optical switch and the second optical switch.

[0048] In some non-limiting embodiments, when performing the action of using the optical communication light source to correct the reduction in power in the optical transmission band, at least one processor is programmed or configured to activate at least one of a wavelength selective switch (WSS) or a wavelength blocking (WB) switch based on the first signal and the second signal, and activate the optical communication light source based on activating the WSS or WB switch. In some non-limiting embodiments, when performing the action of using the optical communication light source to correct the reduction in power in the optical transmission band, the optical network management system is programmed or configured to perform the action of using the optical communication light source to correct the reduction in power in the optical transmission band within 50 ms of identifying the presence of the reduction in power in the optical transmission band.

[0049] In this way, the optical network management system can provide fast fault identification and system recovery based on ultra-fast optical channel management (OCM) and fast C+L wideband OCM, and provide protection under multiple fault conditions, which can prevent faults related to subsets of (e.g., continuous or non-continuous) channels or specific bands that can be detected and quickly recovered. In some non-limiting embodiments, the optical network management system can provide applicability for identifying specific faults and increase fast channelization ASE for fast recovery. In some non-limiting embodiments, the optical network management system can achieve a fault recovery time within 50ms, and in some non-limiting embodiments, less than 30ms.

[0050] Reference now Figure 1 , Figure 1 1 is a diagram of an example environment 100 in which the systems, devices, products, and / or methods described herein may be implemented. Figure 1 As shown, the environment 100 may include an optical network management system 102, an optical transmitter device 104, an optical amplifier device 106, and an optical receiver device 108. The optical transmitter device 104, the optical amplifier device 106, and the optical receiver device 108 may be connected via an optical fiber 110 to form an optical communication network 112. In some non-limiting embodiments, the optical network management system 102, the optical transmitter device 104, the optical amplifier device 106, and the optical receiver device 108 may be interconnected (e.g., establish a connection to communicate) via a wired connection, a wireless connection, or a combination of wired and wireless connections.

[0051] The optical network management system 102 may include one or more devices configured to communicate with the optical transmitter device 104, the optical amplifier device 106, and / or the optical receiver device 108 and monitor and control the operation of the components of the optical communication network. For example, the optical network management system 102 may include circuits, controllers, processing devices, computing devices (e.g., servers, server groups, etc.), and / or other similar devices. Additionally or alternatively, the optical network management system 102 may include an OCM (e.g., a fast OCM, an OCM sensing device, etc.) and / or other components of the optical communication network. In some non-limiting embodiments, the optical network management system 102 may communicate with a data storage device, which may be local or remote to the optical network management system 102. In some non-limiting embodiments, the optical network management system 102 may be able to receive information from the data storage device, store information in the data storage device, send information to the data storage device, and / or search for information stored in the data storage device.

[0052] The optical transmitter device 104 may include one or more devices configured to send optical signals on an optical communication network (e.g., using an electrical signal to modulate the power of a light source). For example, the optical transmitter device 104 may include an optical transmitter, an optical transceiver (e.g., an optical and electrical transceiver), and / or other similar devices. Additionally or alternatively, the optical network management system 102 may include semiconductor devices such as photodiodes (e.g., photosensitive semiconductor diodes), light emitting diodes (LEDs), laser diodes, and / or the like. In some non-limiting embodiments, the optical transmitter device 104 may include one or more devices configured to communicate with the optical network management system 102.

[0053] The optical amplifier device 106 may include one or more devices configured to amplify (e.g., directly amplify without conversion to electrical signals) optical signals on an optical communication network. For example, the optical amplifier device 106 may include an optical amplifier (e.g., EDFA), a repeater (e.g., an optical repeater, an optoelectronic repeater, etc.), and / or other similar devices. In some non-limiting embodiments, the optical amplifier device 106 may include one or more devices configured to communicate with the optical network management system 102.

[0054] The optical receiver device 108 may include one or more devices configured to receive optical signals on an optical communication network. For example, the optical receiver device 108 may include an optical receiver (e.g., a coherent optical receiver), a photodetector, and / or other similar devices. In some non-limiting embodiments, the optical receiver device 108 may include one or more devices configured to communicate with the optical network management system 102.

[0055] Reference now Figure 2 , Figure 2 2 is a diagram of example components of a device 200. The device 200 may correspond to the optical network management system 102 (e.g., one or more devices of the optical network management system 102), the optical transmitter device 104, the optical amplifier device 106, and / or the optical receiver device 108. In some non-limiting embodiments, the optical network management system 102, the optical transmitter device 104, the optical amplifier device 106, and / or the optical receiver device 108 may include at least one device 200 and / or at least one component of the device 200. Figure 2 As shown, device 200 may include a bus 202 , a processor 204 , a memory 206 , a storage component 208 , an input component 210 , an output component 212 , and a communication interface 214 .

[0056] The bus 202 may include components that allow communication between components of the device 200. In some non-limiting embodiments, the processor 204 may be implemented in hardware, software, or a combination of hardware and software. For example, the processor 204 may include a processor (e.g., a central processing unit (CPU), a graphics processing unit (GPU), an accelerated processing unit (APU), etc.), a microprocessor, a digital signal processor (DSP), and / or any processing component that can be programmed to perform a function (e.g., a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a device configured to implement a logical function, etc.). The memory 206 may include a random access memory (RAM), a read-only memory (ROM), and / or another type of dynamic or static storage memory (e.g., flash memory, magnetic memory, optical memory, etc.) that stores information and / or instructions for use by the processor 204.

[0057] The storage component 208 may store information and / or software related to the operation and use of the device 200. For example, the storage component 208 may include a hard disk (e.g., a magnetic disk, an optical disk, a magneto-optical disk, a solid-state drive, etc.), a compact disk (CD), a digital versatile disk (DVD), a floppy disk, a cassette, a magnetic tape, and / or other types of computer-readable media, and corresponding drives.

[0058] Input components 210 may include components that allow device 200 to receive information, such as via user input (e.g., a touch screen display, a keyboard, a keypad, a mouse, buttons, switches, a microphone, etc.). Additionally or alternatively, input components 210 may include sensors for sensing information (e.g., a global positioning system (GPS) component, an accelerometer, a gyroscope, an actuator, etc.). Output components 212 may include components that provide output information from device 200 (e.g., a display, a speaker, one or more LEDs, etc.).

[0059] The communication interface 214 may include a transceiver-like component (e.g., a transceiver, a separate receiver and transmitter, etc.) that enables the device 200 to communicate with other devices, such as via a wired connection, a wireless connection, or a combination of wired and wireless connections. The communication interface 214 may allow the device 200 to receive information from another device and / or provide information to another device. For example, the communication interface 214 may include an Ethernet interface, an optical interface, a coaxial interface, an infrared interface, a radio frequency (RF) interface, a universal serial bus (USB) interface, interface, cellular network interface, and / or the like.

[0060] Device 200 may perform one or more of the processes described herein. Device 200 may perform these processes based on processor 204 executing software instructions stored by a computer-readable medium (such as memory 206 and / or storage component 208). Computer-readable media (e.g., non-transitory computer-readable media) are defined herein as non-transitory memory devices. Non-transitory memory devices include memory space located within a single physical storage device or memory space distributed across multiple physical storage devices.

[0061] The software instructions may be read into the memory 206 and / or storage component 208 from another computer-readable medium or from another device via the communication interface 214. When executed, the software instructions stored in the memory 206 and / or storage component 208 may cause the processor 204 to perform one or more processes described herein. Additionally or alternatively, hardwired circuitry may be used in place of or in combination with software instructions to perform one or more processes described herein. Therefore, the embodiments described herein are not limited to any specific combination of hardware circuitry and software.

[0062] Figure 2 The number and arrangement of components shown in are provided as examples. In some non-limiting embodiments, the device 200 may include Figure 2 Additional components, fewer components, different components, or differently arranged components than those shown. Additionally or alternatively, one set of components (e.g., one or more components) of device 200 may perform one or more functions described as being performed by another set of components of device 200.

[0063] Reference now Figure 3 , Figure 33 is a flow chart of a non-limiting embodiment of a process 300 for recovery of a transmission system failure in an optical communication network. In some non-limiting embodiments, one or more steps of the process 300 may be performed (e.g., completely, partially, etc.) by the optical network management system 102 (e.g., one or more devices of the optical management system 102). In some non-limiting embodiments, one or more steps of the process 300 may be performed (e.g., completely, partially, etc.) by another device or group of devices separate from or including the optical management system 102 (e.g., one or more devices of the feature management system 102), the optical transmitter device 104, the optical amplifier device 106, and / or the optical receiver device 108.

[0064] like Figure 3 As shown, at step 302, the process 300 includes identifying the presence of a reduction in power in an optical transmission band of the optical communication network. For example, the optical network management system 102 can identify the presence of a reduction in power in an optical transmission band of a plurality of optical transmission bands of the optical communication network. In some non-limiting embodiments, the optical transmission band can be a C-band (e.g., an electromagnetic spectrum in a wavelength range between 1530nm and 1565nm) or an L-band (e.g., an electromagnetic spectrum in a wavelength range between 1570nm and 1610nm). In some non-limiting embodiments, the optical transmission band can be a band that does not include the C-band or the L-band. In some non-limiting embodiments, the optical transmission band can be a band other than the C-band or the L-band.

[0065] In some non-limiting embodiments, the optical network management system 102 may identify the presence of a reduction in power in the optical transmission band as a total loss of power in the optical transmission band. In some non-limiting embodiments, the optical network management system 102 may identify the presence of a reduction in power as a reduction in the amount of power in the optical transmission band that is less than the total loss of power. For example, the optical network management system 102 may identify the presence of a reduction in power as a reduction in the amount of power in the optical transmission band that satisfies a threshold amount of power loss.

[0066] In some non-limiting embodiments, the optical network management system 102 can identify the presence of a reduction in power in the optical transmission band based on a measurement of the amount of power in the optical transmission band. For example, the optical network management system 102 can identify the presence of a reduction in power in the optical transmission band based on a reading of the OCM. In some non-limiting embodiments, the reading can show that the reduction in power in the optical transmission band is occurring in real time.

[0067] like Figure 3As shown, at step 304, process 300 includes determining a cause of a reduction in power in the optical transmission band. For example, optical network management system 102 may determine a cause of a reduction in power in the optical transmission band based on identifying the presence of a reduction in power in the optical transmission band.

[0068] In some non-limiting embodiments, the optical network management system 102 may determine the cause of the reduction in power in the optical transmission band based on a signal from a sensing device (such as an OCM) of the optical communication network. For example, the optical network management system 102 may receive a signal from the OCM, and the optical network management system 102 may determine the cause of the reduction in power based on information included in the signal from the sensor device.

[0069] In some non-limiting embodiments, the optical network management system 102 may determine the cause of the reduction in power in the optical transmission band based on signals from a plurality of photodiodes. For example, the optical network management system 102 may receive a first signal indicating a fault condition of an optical communication device of the optical communication network from a first photodiode among the plurality of photodiodes and receive a second signal indicating a fault condition of the optical communication device of the optical communication network from a second photodiode among the plurality of photodiodes. In such an example, the optical network management system 102 may determine the identification of the optical communication device based on the first signal and the second signal. In some non-limiting embodiments, the optical network management system 102 may determine the identification of the optical communication device based on the positions of a plurality of photodiodes in the optical communication network. In some non-limiting embodiments, the optical network management system 102 may determine that the optical communication device is not operating normally based on the first signal and / or the second signal.

[0070] like Figure 3 As shown, at step 306, process 300 includes performing an action of using an optical communication light source to correct the reduction of power in the optical transmission band. For example, optical network management system 102 may perform an action of using one or more optical communication light sources to correct the reduction of power in the optical transmission band. In some non-limiting embodiments, the optical communication light source may include an ASE light source.

[0071] In some non-limiting embodiments, the optical network management system 102 may perform an action to correct the reduction in power in the optical transmission band using the optical communication light source within 50 ms of identifying the presence of a reduction in power in the optical transmission band. For example, the optical network management system 102 may perform an action to correct the reduction in power within 30 ms, 20 ms, or 10 ms of identifying the presence of a reduction in power in the optical transmission band.

[0072] In some non-limiting embodiments, the optical network management system 102 may cause the optical communication light source to emit light. For example, the optical network management system 102 may cause the optical communication light source to emit light on a path (e.g., a specific path, such as a channel) of the optical communication network. In some non-limiting embodiments, when performing an action of using the optical communication light source to correct the reduction of power in the optical transmission band, the optical network management system 102 may activate the first optical switch (e.g., based on a first signal received from a first photodiode and / or a second signal received from a second photodiode) and / or activate the second optical switch (e.g., based on a first signal received from a first photodiode and / or a second signal received from a second photodiode), which allows the optical communication light source to emit light on a specific path defined by the first optical switch and / or the second optical switch. In some non-limiting embodiments, the optical network management system 102 may activate the optical communication light source based on activating the first optical switch and / or the second optical switch. In some non-limiting embodiments, the optical switch (e.g., the first optical switch or the second optical switch) may include a WSS, a WB switch, and / or a variable optical attenuator (VOA) array.

[0073] Reference now Figure 4 , Figure 4 4 is a diagram of a non-limiting embodiment of an ASE light source 404 connected to a WSS 402. Figure 4 As shown, WSS 402 includes a plurality of signal ports as inputs of WSS 402 and line outputs as outputs of WSS 402. Figure 4 As shown, ASE light source 404 can be connected to a signal port of WSS 402 as an input. In some non-limiting embodiments, WSS 402 can provide light received from ASE light source 404 as an output of WSS 402 in the event of a failure of one or more inputs of WSS 402.

[0074] In some non-limiting embodiments, the ASE light source 404 can insert light on the input based on an OCM (e.g., a C-band OCM or an L-band OCM) that performs a scanning operation based on a power balancing algorithm using a line card or node control loop that operates at a time interval of 10 seconds or longer (e.g., at 2 scans / second). In some non-limiting embodiments, the ASE light source 404 can insert light on the input, and the WSS 402 can provide light to the line output of the WSS 402 in a range between 100ms and 100s.

[0075] Reference now Figure 5 , Figure 5 5 is a diagram of a non-limiting embodiment of an optical communication network 500. Figure 5As shown, the optical communication network 500 may include a fast OCM 502 connected to the optical network management system 102. In some non-limiting embodiments, the optical network management system 102 may include the fast OCM 502 or the optical network management system 102 may be a component of the fast OCM 502. Figure 5 As shown, the optical communication network 500 may include a plurality of photodiodes 504-1 to 504-8, which may be located adjacent to each of the amplifiers 506-1, 506-2, 508-1, and 508-2, respectively. In some non-limiting embodiments, the amplifiers 506-1 and 506-2 may be components of the C-band portion of the optical communication network 500, and the amplifiers 508-1 and 508-2 may be components of the L-band portion of the optical communication network 500. Figure 5 As shown, optical communication network 500 may include a C-band ASE (C-ASE) optical source 510 connected to other components in the C-band portion via optical switches 514-1, 514-2, and 514-3. Figure 5 As shown, the optical communication network 500 may include an L-ASE (L-ASE) light source 512 connected to other components of the L-band portion via optical switches 514-4, 514-5, and 514-6. In addition, the optical communication network 500 may include a band splitter 516-1 at a first end of the optical communication network 500 where the C-band portion and the L-band portion are separated and a band coupler 516-2 at a second end of the optical communication network 500 where the C-band portion and the L-band portion are combined. Figure 5 As shown, the combined C-band and L-band signals are received by band splitter 516-1, and fast OCM 502 is connected downstream of band coupler 516-2.

[0076] In some non-limiting embodiments, the optical network management system 102 can identify the presence of a reduction in power in the C-band or L-band of the optical communication network 500 based on the readings of the fast OCM 502. For example, the optical network management system 102 can identify the presence of a reduction in power in the first optical transmission band of the optical communication network 500 based on the readings of the fast OCM 502.

[0077] In some non-limiting embodiments, the optical network management system 102 may determine the cause of the reduction in power in the C-band or L-band of the optical communication network 500 based on identifying the presence of a reduction in power in the C-band or L-band. In one example, regarding the reduction in power in the C-band, the optical network management system 102 may receive a first signal indicating a fault condition of the amplifier 506-1 from the photodiode 504-1 and a second signal indicating a fault condition of the amplifier 506-1 from the photodiode 504-2. The optical network management system 102 may determine the identification of the amplifier 506-1 based on the first signal and the second signal. In some non-limiting embodiments, the optical network management system 102 may determine the identification of the amplifier 506-1 based on determining that the amplifier 506-1 is located between the photodiode 504-1 and the photodiode 504-2. In some non-limiting embodiments, the optical network management system 102 may determine that the amplifier 506-1 is not operating properly based on the first signal and / or the second signal. In some non-limiting embodiments, the optical network management system 102 may determine the cause of the reduction in power based on a failure of amplifier 506-2 (e.g., determining the cause based on a signal from photodiode 504-3 and a signal from photodiode 504-4), determine the cause of the reduction in power based on a failure of amplifier 508-1 (e.g., determining the cause based on a signal from photodiode 504-5 and a signal from photodiode 504-6), and / or determine the cause of the reduction in power based on a failure of amplifier 508-2 (e.g., determining the cause based on a signal from photodiode 504-7 and a signal from photodiode 504-8) in the same or similar manner as described above.

[0078] In some non-limiting embodiments, the optical network management system 102 can perform an action to correct a reduction in power in the C-band of the optical communication network using the C-ASE light source 510. In one example, based on the failure of the amplifier 506-1, the optical network management system 102 can activate the optical switch 514-1 and the optical switch 514-2 based on the signal from the photodiode 504-1 and the signal from the photodiode 504-2. In such an example, the optical network management system 102 can cause the optical switch 514-1 and the optical switch 514-2 to change to a state where the optical switch 514-1 and the optical switch 514-2 allow light to pass. In such an example, the optical network management system 102 can activate the C-ASE light source 510 based on activating the optical switch 514-1 and / or the optical switch 514-2.

[0079] In another example, based on the failure of amplifier 506-1 and / or amplifier 506-2, the optical network management system 102 can deactivate optical switch 514-1 and activate optical switch 514-2 and optical switch 514-3 based on the signal from photodiode 504-1 and the signal from photodiode 504-2 (e.g., based on the failure of amplifier 506-1) or based on the signal from photodetector 504-3 and the signal from photodiode 504-4 (e.g., based on the failure of amplifier 506-2). In such an example, the optical network management system 102 can change optical switch 514-1 to a state where optical switch 514-1 does not allow light to pass through, and can change optical switch 514-2 and optical switch 514-3 to a state where optical switch 514-2 and optical switch 514-3 allow light to pass through. In such an example, the optical network management system 102 can activate C-ASE light source 510 based on deactivating optical switch 514-1 and activating optical switch 514-2 and / or optical switch 514-3.

[0080] In some non-limiting embodiments, the optical network management system 102 can perform an action to correct the reduction of power in the L-band of the optical communication network using the L-ASE light source 512. In one example, based on the failure of the amplifier 508-1, the optical network management system 102 can activate the optical switch 514-4 and the optical switch 514-5 based on the signal from the photodiode 504-5 and the signal from the photodiode 504-6. In such an example, the optical network management system 102 can cause the optical switch 514-4 and the optical switch 514-5 to change to a state where the optical switch 514-4 and the optical switch 514-5 allow light to pass. In such an example, the optical network management system 102 can activate the L-ASE light source 512 based on activating the optical switch 514-4 and / or the optical switch 514-5.

[0081] In another example, based on the failure of amplifier 508-1 and / or amplifier 508-2, the optical network management system 102 can deactivate optical switch 514-5 and activate optical switch 514-4 and optical switch 514-6 based on the signal from photodiode 504-5 and the signal from photodiode 504-6 (e.g., based on the failure of amplifier 508-1) or based on the signal from photodiode 504-7 and the signal from photodiode 504-8 (e.g., based on the failure of amplifier 508-2). In such an example, the optical network management system 102 can change optical switch 514-5 to a state where optical switch 514-5 does not allow light to pass through, and can change optical switch 514-4 and optical switch 514-6 to a state where optical switch 514-4 and optical switch 514-6 allow light to pass through. In such an example, the optical network management system 102 can activate the L-ASE optical source 512 based on deactivating the optical switch 514-5 and activating the optical switch 514-4 and / or the optical switch 514-6.

[0082] In some non-limiting embodiments, the optical network management system 102 may perform an action to correct the reduction in power in the C-band or L-band of the optical communication network 500 using the C-ASE light source 510 or the L-ASE light source 512 within a time interval (e.g., 50ms, 40ms, 30ms, 20ms, 10ms, etc.) of identifying the presence of a reduction in power in the C-band or L-band of the optical communication network 500.

[0083] Reference now Figure 6 , Figure 6 is a diagram of a non-limiting embodiment of an OCM sensing device 600. Figure 6 As shown, the OCM sensing device 600 may include an OCM 602, a band separator 604, and photodiodes 606-1 and 606-2. In some non-limiting embodiments, the OCM 602 may be configured to initiate a scanning operation (e.g., a scanning operation of one or more bands, one or more channels, etc.) based on a change in the power level of the photodiode 606-1 and / or the photodiode 606-2. In this way, the OCM sensing device 600 has a faster response than if the scanning operation is not initiated until a command is received (e.g., from a node of the optical communication network). In addition, the OCM sensing device 600 may be able to distinguish between the light provided by the ASE light source and the signal.

[0084] Reference now Figure 7 , Figure 7 is a diagram of a non-limiting embodiment of an optical communication network 700 having a plurality of reconfigurable optical add / drop multiplexer (ROADM) nodes 702. Figure 7As shown, the optical communication network 700 may include a plurality of ROADM nodes 702, a fiber interconnect 706, and a plurality of analog-to-digital (A / D) converter blocks 704. In some non-limiting embodiments, each ROADM node 702 may include a C-band and L-band (C+L) WSS for reception, and a C+L WSS for transmission. In some non-limiting embodiments, the optical network management system 102 may include the ROADM node 702, or the optical network management system 102 may be a component of one or more ROADM nodes 702. In some non-limiting embodiments, the fiber interconnect 706 may include a jumper, a conversion box, and / or an optical backplane. In some non-limiting embodiments, the fiber interconnect 706 may include a single optical fiber or multiple optical fibers. In some non-limiting embodiments, the A / D converter block 704 may include an amplifier device (e.g., an EDFA) and provide signals to multiple channels available at each A / D converter block 704.

[0085] In some non-limiting embodiments, ROADM node 702 may allow for the detection of a number of faults that may occur on optical communications network 700 (eg, causes of a reduction in power in an optical transmission band). For example, the ROADM node 702 may tolerate failures based on damaged fiber connections (e.g., fiber connections within the ROADM node 702), failures based on failures of C-band and L-band EDFAs, failures based on failures of fiber connections into EDFAs, failures based on failures of fiber interconnects of the ROADM node 702 (e.g., failures of fiber interconnects 706 of the ROADM node 702), failures based on failures of fiber interconnects of the A / D converter blocks 704 (e.g., failures of fiber interconnects 706 of the A / D converter blocks 704), failures based on failures of the A / D converter block 704 tapping structure (e.g., CD or CDC A / D tapping structure failures, even or odd for fixed A / D converter blocks 704 with comb splitters or any portion of the optical band), failures based on failures of arrays of A / D converter blocks 704 or EDFAs, failures based on failures of channel groups (e.g., host chassis failures), failures based on failures of individual transceivers and / or transponders, and / or the like.

[0086] Now refer to 8A, Fig. 8A 8 is a diagram of a non-limiting embodiment of a ROADM node 800. In some non-limiting embodiments, the ROADM node 800 may be the same as or similar to the ROADM node 702. Fig. 8A As shown, ROADM node 800 may include an OCM sensing device 802, which may include an OCM 802-1, a photodiode 804-1, and a photodiode 804-2. Fig. 8AAs shown, ROADM node 800 may include EDFA 806-1, EDFA 806-2, EDFA 808-1, EDFA 808-2, band coupler 810-1, and band coupler 810-2. Fig. 8A As shown, the ROADM node 800 may include an L-band ASE light source device 812-1 and a C-band ASE light source device 812-2. In some non-limiting embodiments, the L-band ASE light source device 812-1 may include an ultra-high-speed (UHS) channelized (CH) ASE light source that provides light in the L-band and a switch device that provides light on a first path (path L1) or a second path (path L2). In some non-limiting embodiments, the C-band ASE light source device 812-2 may include an ultra-high-speed (UHS) channelized (CH) ASE light source that provides light in the C-band and a switch device that provides light on a first path (path C1) or a second path (path C2).

[0087] Also like Fig. 8A As shown, ROADM node 800 may include WSS 814-1, WSS 814-2, and a plurality of photodiodes 816. In some non-limiting embodiments, WSS 814-1 may include a WSS configured on a receive path of ROADM node 800. In some non-limiting embodiments, WSS 814-2 may include a WSS configured on a transmit path of ROADM node 800. In some non-limiting embodiments, for each path as an input to WSS 814-2, a plurality of photodiodes 816 may act as a monitor. Fig. 8A As shown, ROADM node 800 may include a band separator 818-1 and a band separator 818-2.

[0088] In some non-limiting embodiments, the optical network management system 102 can monitor the ROADM node 800 for a fault based on a trigger. In some non-limiting embodiments, the optical network management system 102 can monitor the ROADM node 800 for a fault based on a trigger provided by a signal of a photodiode of the plurality of photodiodes 816, an alarm indicating a loss of signal (LOS) from the EDFA 806-1, an alarm indicating a loss of signal from the EDFA 808-1, an alarm indicating a loss of power (LOP) from the EDFA 806-1, an alarm indicating a loss of power from the EDFA 808-1, a signal from the OCM 802-1 associated with the optical monitoring channel (e.g., a signal indicating an uplink disconnection), a signal from the photodiode 804-1, and / or a signal from the photodiode 804-2.

[0089] Reference now Figure 8B , Figure 8B 801A is a diagram of a non-limiting embodiment of a table 801A associated with actions for recovery from a transmission system failure of the ROADM node 800. As shown in the table, a trigger to the optical network management system 102 may be provided within 1-2 ms, the optical network management system 102 may cause the OCM 802-1 to perform a scanning operation within less than 10 ms, and the optical network management system 102 may provide light from the L-band ASE light source device 812-1 and / or the C-band ASE light source device 812-2 within less than 20 ms (e.g., based on the optical switch being activated within less than 10 ms and the L-band ASE light source device 812-1 and / or the C-band ASE light source device 812-2 providing light within less than 10 m).

[0090] As shown in Table 801A, the signal from the photodiode 804-1 can provide a trigger to the optical network management system 102, and the optical network management system 102 can cause the OCM 802-1 to perform a scanning operation (e.g., an L-band scanning operation), and the optical network management system 102 can provide light from the L-band ASE light source device 812-1 along the path C1 and the path L2 of the ROADM node 800.

[0091] As also shown in Table 801A, the alarm indicating the loss of power from EDFA 808-1 and the signal from photodiode 804-2 can provide a trigger to the optical network management system 102, and the optical network management system 102 can cause OCM 802-1 to perform a scanning operation (e.g., a C-band scanning operation), and the optical network management system 102 can provide light from C-band ASE light source device 812-2 along path C2 and path L1 of ROADM node 800. As also shown in Table 801A, the alarm indicating the loss of power from EDFA 806-1 and the signal from photodiode 804-1 can provide a trigger to the optical network management system 102, and the optical network management system 102 can cause OCM 802-1 to perform a scanning operation (e.g., an L-band scanning operation), and the optical network management system 102 can provide light from L-band ASE light source device 812-1 along path C1 and path L2 of ROADM node 800.

[0092] As also shown in table 801A, an alarm indicating a loss of power from EDFA 806-1 and a signal from photodiode 804-1 may provide a trigger to optical network management system 102, and optical network management system 102 may cause OCM 802-1 to perform a scanning operation (e.g., an L-band scanning operation), and optical network management system 102 may provide light from L-band ASE light source device 812-1 along path C1 and path L2 of ROADM node 800. As also shown in table 801A, an alarm indicating a loss of signal from EDFA 808-1 may provide a trigger to optical network management system 102, and optical network management system 102 may cause OCM 802-1 to perform a scanning operation (e.g., a C-band scanning operation), and optical network management system 102 may provide light from C-band ASE light source device 812-2 along path C2 and path L1 of ROADM node 800.

[0093] As also shown in Table 801A, an alarm indicating a loss of a signal from EDFA 806-1 may provide a trigger to optical network management system 102, and optical network management system 102 may cause OCM 802-1 to perform a scanning operation (e.g., an L-band scanning operation), and optical network management system 102 may provide light from L-band ASE light source device 812-1 along path C1 and path L2 of ROADM node 800. As also shown in Table 801A, signals of photodiodes of plurality of photodiodes 816 may provide a trigger to optical network management system 102, and optical network management system 102 may cause OCM 802-1 to perform a scanning operation (e.g., an L-band scanning operation and a C-band scanning operation), and optical network management system 102 may provide light from L-band ASE light source device 812-1 and / or C-band ASE light source device 812-2 along path C1 and path L1 of ROADM node 800.

[0094] Reference now Fig. 9A , Fig. 9A 9 is a diagram of a non-limiting embodiment of a ROADM node 900. In some non-limiting embodiments, the ROADM node 900 may be the same as or similar to the ROADM node 702 and / or the ROADM node 800. Fig. 9A As shown, the ROADM node 900 may include an OCM sensing device 802, which may include an OCM 802-1, a photodiode 804-1, and a photodiode 804-2. Fig. 9A As shown in FIG. 8 , ROADM node 900 may include EDFA 806-1, EDFA 806-2, EDFA 808-1, and EDFA 808-2. Fig. 8AAs shown in , the ROADM node 800 may include an L-band ASE light source device 812-1 and a C-band ASE light source device 812-2. In some non-limiting embodiments, the L-band ASE light source device 812-1 may include an ultra-high-speed (UHS) channelized (CH) ASE light source that provides light in the L-band and a switch device that provides light on a first path (path L1) or a second path (path L2). In some non-limiting embodiments, the C-band ASE light source device 812-2 may include an ultra-high-speed (UHS) channelized (CH) ASE light source that provides light in the C-band and a switch device that provides light on a first path (path C1) or a second path (path C2).

[0095] Also like Fig. 9A As shown, the ROADM node 900 may include a WSS 914-1, a WSS 914-2, a WSS 914-3, a WSS 914-4, and a plurality of photodiodes 916. In some non-limiting embodiments, the WSS 914-1 and the WSS 914-3 may include WSSs configured on a receive path of the ROADM node 800. In some non-limiting embodiments, the WSS 914-2 and the WSS 914-4 may include WSSs configured on a transmit path of the ROADM node 900. In some non-limiting embodiments, for each path as an input to the WSS 914-2 and / or the WSS 914-4, the plurality of photodiodes 916 may act as monitors. Also as shown in FIG. Fig. 9A As shown, ROADM node 900 may include a band separator 818-1 and a band separator 818-2.

[0096] In some non-limiting embodiments, the optical network management system 102 can monitor the ROADM node 900 for a fault based on a trigger. In some non-limiting embodiments, the optical network management system 102 can monitor the ROADM node 900 for a fault based on a trigger provided by a signal of a photodiode of the plurality of photodiodes 916, an alarm indicating a loss of a signal from the EDFA 806-1, an alarm indicating a loss of a signal from the EDFA 808-1, an alarm indicating a loss of power from the EDFA 806-1, an alarm indicating a loss of power from the EDFA 808-1, a signal from the OCM 802-1 associated with the optical monitoring channel (e.g., a signal indicating an uplink disconnection), a signal from the photodiode 804-1, and / or a signal from the photodiode 804-2.

[0097] Now refer to 9B, Fig. 9B is a non-limiting example of table 801B associated with actions for recovery from a transmission system failure of ROADM node 900. Fig. 9BForm 801B (which is Figure 8B 801A shown in FIG. 801A ) as shown in FIG. 801A , any of the faults listed in 1-9 are Figure 8B The faults listed in the illustrated table 801A are the same.

[0098] In addition, if Fig. 9B As shown, an alarm indicating a loss of a signal from EDFA 806-1 and an alarm indicating a loss of a signal from EDFA 808-1 may provide a trigger to the optical network management system 102, and the optical network management system 102 may cause OCM 802-1 to perform a scanning operation (e.g., an L-band scanning operation and a C-band scanning operation), and the optical network management system 102 may provide light from the L-band ASE light source device 812-1 and / or the C-band ASE light source device 812-2 along path C2 and path L1 and path C1 and path L2 of the ROADM node 800.

[0099] Although the disclosed subject matter has been described in detail for purposes of illustration based on what are presently considered to be the most practical and preferred embodiments, it should be understood that such detail is provided for that purpose only and that the disclosed subject matter is not limited to the disclosed embodiments, but, on the contrary, is intended to cover modifications and equivalent arrangements within the spirit and scope of the appended claims. For example, it should be understood that the presently disclosed subject matter contemplates that, to the extent possible, one or more features of any embodiment may be combined with one or more features of any other embodiment.

Claims

1. A system for recovering from a transmission system failure, comprising: at least one processor programmed or configured to: identifying the presence of a reduction in power in an optical transmission band among a plurality of optical transmission bands of an optical communications network; determining a cause of the reduction in power in the optical transmission band based on identifying the presence of the reduction in power in the optical transmission band; as well as An action is performed to correct a reduction in power in an optical transmission band using an optical communication light source.

2. The system of claim 1, wherein: When identifying the presence of a fault in an optical transmission band of the plurality of optical transmission bands of the optical communications network, the at least one processor is programmed or configured to: The presence of a reduction in power in a first optical transmission band of an optical communication network is identified based on a reading of an optical channel monitor (OCM).

3. The system of claim 2, wherein: When determining a cause for a reduction in power in the optical transmission band, the at least one processor is programmed or configured to: receiving a first signal from a first photodiode of the plurality of photodiodes indicating a fault condition of an optical communication device of the optical communication network; receiving a second signal from a second photodiode of the plurality of photodiodes indicative of a fault condition of an optical communication device of the optical communication network; as well as An identification of the optical communication device is determined based on the first signal and the second signal.

4. The system of claim 3, wherein: When determining the cause of the fault, the at least one processor is programmed or configured to: It is determined based on the first signal and the second signal that the optical communication device is not operating normally.

5. The system of claim 3, wherein: When performing the act of using the optical communication light source to correct for a reduction in power in the optical transmission band, the at least one processor is programmed or configured to: activating a first optical switch based on the first signal and the second signal; activating a second optical switch based on the first signal and the second signal; and The optical communication light source is activated based on activating the first optical switch and the second optical switch.

6. The system of claim 3, wherein: When performing the act of using the optical communication light source to correct for a reduction in power in the optical transmission band, the at least one processor is programmed or configured to: activating at least one of a wavelength selective switch (WSS) or a wavelength blocking (WB) switch based on the first signal and the second signal; and The optical communication light source is activated based on activating the WSS or the WB switch.

7. The system of claim 1, wherein: When performing the act of using the optical communication light source to correct for a reduction in power in the optical transmission band, the at least one processor is programmed or configured to: Within 50 ms of recognizing the presence of a reduction in power in the optical transmission band, an action of correcting the reduction in power in the optical transmission band using the optical communication light source is performed.

8. A method for recovering from a transmission system failure, comprising: identifying, with at least one processor, the presence of a reduction in power in an optical transmission band of a plurality of optical transmission bands of an optical communications network; determining, with at least one processor, a cause of a reduction in power in the optical transmission band based on identifying the presence of a reduction in power in the optical transmission band; as well as An act of correcting a reduction in power in an optical transmission band using an optical communication light source is performed with at least one processor.

9. The method of claim 8, wherein identifying the presence of a fault in an optical transmission band of the plurality of optical transmission bands of the optical communication network comprises: The presence of a reduction in power in a first optical transmission band of an optical communication network is identified based on a reading of an optical channel monitor (OCM).

10. The method of claim 9, wherein determining a cause of a reduction in power in the optical transmission band comprises: receiving a first signal from a first photodiode of the plurality of photodiodes indicating a fault condition of an optical communication device of the optical communication network; receiving a second signal from a second photodiode of the plurality of photodiodes indicative of a fault condition of an optical communication device of the optical communication network; as well as An identification of the optical communication device is determined based on the first signal and the second signal.

11. The method of claim 10, wherein determining the cause of the failure comprises: It is determined based on the first signal and the second signal that the optical communication device is not operating normally.

12. The method of claim 10, wherein performing the act of using an optical communication light source to correct for a reduction in power in an optical transmission band comprises: activating a first optical switch based on the first signal and the second signal; activating a second optical switch based on the first signal and the second signal; as well as The optical communication light source is activated based on activating the first optical switch and the second optical switch.

13. The method of claim 10, wherein performing the act of using an optical communication light source to correct for a reduction in power in an optical transmission band comprises: activating at least one of a wavelength selective switch (WSS) or a wavelength blocking (WB) switch based on the first signal and the second signal; as well as The optical communication light source is activated based on activating the WSS or the WB switch.

14. The method of claim 8, wherein performing the act of using an optical communication light source to correct for a reduction in power in an optical transmission band comprises: Within 50 ms of recognizing the presence of a reduction in power in the optical transmission band, an action of correcting the reduction in power in the optical transmission band using the optical communication light source is performed.

15. A computer program product for recovery of a transmission system failure, the computer program product comprising at least one non-transitory computer-readable medium, the at least one non-transitory computer-readable medium comprising one or more instructions, the one or more instructions, when executed by at least one processor, causing the at least one processor to: identifying the presence of a reduction in power in an optical transmission band among a plurality of optical transmission bands of an optical communications network; determining a cause of the reduction in power in the optical transmission band based on identifying the presence of the reduction in power in the optical transmission band; and An action is performed to correct a reduction in power in an optical transmission band using an optical communication light source.

16. The computer program product of claim 15, wherein: The one or more instructions causing the at least one processor to identify the presence of a fault in an optical transmission band of the plurality of optical transmission bands of the optical communications network cause the at least one processor to: The presence of a reduction in power in a first optical transmission band of an optical communication network is identified based on a reading of an optical channel monitor (OCM).

17. The computer program product of claim 16, wherein: The one or more instructions that cause the at least one processor to determine a cause for a reduction in power in the optical transmission band cause the at least one processor to be programmed or configured to: receiving a first signal from a first photodiode of the plurality of photodiodes indicating a fault condition of an optical communication device of the optical communication network; receiving a second signal from a second photodiode of the plurality of photodiodes indicative of a fault condition of an optical communication device of the optical communication network; as well as An identification of the optical communication device is determined based on the first signal and the second signal.

18. The computer program product of claim 17, wherein: The one or more instructions that cause the at least one processor to determine a cause of the fault cause the at least one processor to: It is determined based on the first signal and the second signal that the optical communication device is not operating normally.

19. The computer program product of claim 17, wherein: The one or more instructions causing the at least one processor to perform an action of using an optical communication light source to correct for a reduction in power in an optical transmission band cause the at least one processor to: activating a first optical switch based on the first signal and the second signal; activating a second optical switch based on the first signal and the second signal; and The optical communication light source is activated based on activating the first optical switch and the second optical switch.

20. The computer program product of claim 17, wherein: The one or more instructions causing the at least one processor to perform an action of using an optical communication light source to correct for a reduction in power in an optical transmission band cause the at least one processor to: activating at least one of a wavelength selective switch (WSS) or a wavelength blocking (WB) switch based on the first signal and the second signal; and The optical communication light source is activated based on activating the WSS or the WB switch.

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