Optical transmission apparatus, method and electronic device

Abstract

An optical transmission device, method and electronic device, the optical transmission device comprising a plurality of first dual-band multiplexers (MUXs) and a dual-band wavelength selective switch (WSS), wherein each of the plurality of first dual-band MUXs is configured to receive a first single-wave signal of a first waveband and a second single-wave signal of a second waveband, and combine the first single-wave signal and the second single-wave signal into a first dual-band single-wave signal; the dual-band WSS is connected with the plurality of first dual-band MUXs, wherein the dual-band WSS is configured to receive a plurality of first dual-band single-wave signals from the plurality of first dual-band MUXs, and generate a first combined-wave signal of the first waveband and a second combined-wave signal of the second waveband based on the plurality of first dual-band single-wave signals. The optical transmission device can reduce the cost and failure rate caused by the wavelength selective switch for combining and splitting light, thereby reducing the total cost of the optical transmission device and improving stability.

Description

Technical Field

[0001] One or more embodiments of this disclosure relate to an optical transmission device, method, and electronic device. Background Technology

[0002] With the rapid development of 5G, IoT, and cloud computing technologies, network traffic is experiencing explosive growth. Conventional (C)-band optical transmission systems, due to their limited spectrum resources, are gradually approaching the Shannon limit in terms of single-fiber capacity, making it difficult to meet future demands for ultra-high speed and ultra-large capacity transmission. Against this backdrop, the conventional (C) + long (L) band transmission scheme has emerged. This scheme expands the operating wavelength to the L-band, thereby increasing available spectrum resources. In this way, single-fiber capacity can be increased several times without adding new optical fibers, and the transmission cost per bit can be significantly reduced, providing a core solution for building next-generation backbone optical networks. Summary of the Invention

[0003] This summary section is provided to briefly introduce the concepts, which will be described in detail in the detailed description section below. This summary section is not intended to identify key or essential features of the claimed technical solution, nor is it intended to limit the scope of the claimed technical solution.

[0004] At least one embodiment of this disclosure provides an optical transmission device, comprising: a plurality of first dual-band multiplexers (MUXs), wherein each of the plurality of first dual-band MUXs is configured to: receive a first single-wavelength signal of a first band and a second single-wavelength signal of a second band, and combine the first single-wavelength signal and the second single-wavelength signal into a first dual-band single-wavelength signal; and a dual-band wavelength selection switch (WSS) connected to the plurality of first dual-band MUXs, wherein the dual-band WSS is configured to: receive a plurality of first dual-band single-wavelength signals from the plurality of first dual-band MUXs, and generate a first combined signal of a first band and a second combined signal of a second band based on the plurality of first dual-band single-wavelength signals.

[0005] At least one embodiment of this disclosure provides an optical transmission device, including a dual-band wavelength selective switch (WSS) and a plurality of third dual-band multiplexers (MUXs) connected to the dual-band WSS, wherein: the dual-band WSS is configured to: receive a third multiplexed signal of a first band and a fourth multiplexed signal of a second band; generate a plurality of second dual-band single-wavelength signals based on the third multiplexed signal and the fourth multiplexed signal; and transmit the plurality of second dual-band single-wavelength signals to the plurality of third dual-band MUXs respectively; and each of the plurality of third dual-band MUXs is configured to: receive the second dual-band single-wavelength signals from the dual-band WSS; and generate a third single-wavelength signal of the first band and a fourth single-wavelength signal of the second band based on the second dual-band single-wavelength signals.

[0006] At least one embodiment of this disclosure provides a method for an optical transmission device, the optical transmission device including a plurality of first dual-band multiplexers (MUXs) and a dual-band wavelength selection switch (WSS) connected to the plurality of first dual-band MUXs. The method includes: receiving a first single-wavelength signal of a first band and a second single-wavelength signal of a second band through each of the plurality of first dual-band MUXs; combining the first single-wavelength signal and the second single-wavelength signal into a first dual-band single-wavelength signal through each of the plurality of first dual-band MUXs; receiving a plurality of the first dual-band single-wavelength signals from the plurality of first dual-band MUXs through the dual-band WSS; and generating a first combined signal of a first band and a second combined signal of a second band based on the plurality of first dual-band single-wavelength signals through the dual-band WSS.

[0007] At least one embodiment of this disclosure provides a method for an optical transmission device, the optical transmission device including a dual-band wavelength selective switch (WSS) and a plurality of third dual-band multiplexers (MUXs) connected to the dual-band WSS. The method includes: receiving a third multiplexed signal of a first band and a fourth multiplexed signal of a second band through the dual-band WSS; generating a plurality of second dual-band single-wavelength signals based on the third multiplexed signal and the fourth multiplexed signal of the dual-band WSS; transmitting the plurality of second dual-band single-wavelength signals to the plurality of third dual-band MUXs respectively; receiving the second dual-band single-wavelength signals from the dual-band WSS through each of the plurality of third dual-band MUXs; and generating a third single-wavelength signal of the first band and a fourth single-wavelength signal of the second band through each of the plurality of third dual-band MUXs.

[0008] At least one embodiment of this disclosure provides an electronic device including the optical transmission device described above. Attached Figure Description

[0009] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. Throughout the drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the originals and elements are not necessarily drawn to scale.

[0010] Figure 1A A schematic diagram of an optical transmission device provided in at least one embodiment of the present disclosure is shown.

[0011] Figure 1B A schematic diagram of an optical transmission device provided in at least one embodiment of the present disclosure is shown.

[0012] Figure 2AA schematic diagram of an optical transmission device provided in at least one embodiment of the present disclosure is shown.

[0013] Figure 2B A schematic diagram of an optical transmission device provided in at least one embodiment of the present disclosure is shown.

[0014] Figure 3A A schematic diagram of the first stage device of the optical transmission apparatus provided in at least one embodiment of the present disclosure is shown.

[0015] Figure 3B A schematic diagram of a second-stage device of an optical transmission apparatus provided in at least one embodiment of the present disclosure is shown.

[0016] Figure 4 A flowchart illustrating a method for an optical transmission apparatus provided in at least one embodiment of the present disclosure is shown schematically.

[0017] Figure 5 A flowchart illustrating a method for an optical transmission apparatus provided in at least one embodiment of the present disclosure is shown schematically.

[0018] Figure 6 A schematic diagram of the structure of an electronic device suitable for implementing embodiments of the present disclosure is shown. Detailed Implementation

[0019] One or more embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0020] It should be understood that the steps described in the method embodiments of this disclosure may be performed in different orders and / or in parallel. Furthermore, the method embodiments may include additional steps and / or omit the steps shown. The scope of this disclosure is not limited in this respect.

[0021] The term "comprising" and its variations as used herein are open-ended inclusions, meaning "including but not limited to". The term "based on" means "at least partially based on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Definitions of other terms will be given in the description below.

[0022] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are used only to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependencies.

[0023] It should be noted that the terms "a" and "a plurality of" used in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0024] Generally, to combine multiple single-wavelength signals in the C-band into a single-wavelength C-band signal, and to combine multiple single-wavelength signals in the L-band into a single-wavelength L-band signal, a C-band wavelength selective switch (WSS) and an L-band WSS are required respectively. That is, to generate C-band and L-band combined signals, two WSSs are needed, each with a number of ports corresponding to the number of single-wavelength signals in the respective band. WSSs typically employ liquid crystal on silicon wavelength selective switches (LCOS-WSS). LCOS-WSS are complex and expensive active optoelectronic devices, and their failure rate is relatively high compared to other devices in an optical transmission system. In a dual-band optical transmission system, the number of WSSs is doubled compared to a single-band optical transmission system. Because the cost of WSSs (e.g., this cost can be related to the number of ports) is generally relatively high and their failure rate is relatively high, optical transmission devices using two WSSs have relatively high costs and failure rates.

[0025] Figure 1A A schematic diagram of an optical transmission device provided in at least one embodiment of the present disclosure is shown.

[0026] Reference Figure 1A Describe the process of light emission performed by the optical transmission device 2001. For example... Figure 1A As shown, the optical transmission device 2001 may include N first dual-band MUX 2101-210N and dual-band WSS 2201. Additionally or alternatively, the optical transmission device 2001 may also include... Figure 1B The N third dual-band MUX 2701-270N are shown in the figure.

[0027] According to one or more embodiments of this disclosure, each of the N first dual-band MUXs 2101-210N can receive a first single-wave signal of the first band and a second single-wave signal of the second band. For example, the first dual-band MUX 2101 can receive the first single-wave signal 1 and the second single-wave signal 1, and the first dual-band MUX 2102 ( Figure 1A (not shown in the image) can receive the first single-wavelength signal 2 ( Figure 1A (not shown in the image) and the second single-wave signal 2 ( Figure 1A (Not shown in the image)... The first dual-band MUX 210N can receive a first single-wavelength signal N and a second single-wavelength signal N. Each of the N first dual-band MUXs 2101-210N can combine the first single-wavelength signal and the second single-wavelength signal into a first dual-band single-wavelength signal. For example, the first dual-band MUX 2101 can combine the first single-wavelength signal 1 and the second single-wavelength signal 1 into a first dual-band single-wavelength signal 1, and the first dual-band MUX 2102 (... Figure 1A (not shown in the image) can transmit the first single-wavelength signal 2 ( Figure 1A (not shown in the image) and the second single-wave signal 2 ( Figure 1A (not shown in the image) is synthesized into the first dual-band single-wave signal 2 ( Figure 1A (Not shown in the image)... The first dual-band MUX 210N can combine the first single-wave signal N and the second single-wave signal N into the first dual-band single-wave signal N.

[0028] According to one or more embodiments of this disclosure, the dual-band WSS2201 can be connected to each of N first dual-band MUX2101-210N. The dual-band WSS2201 can receive multiple first dual-band single-wave signals (e.g., first dual-band single-wave signal 1 to first dual-band single-wave signal N) from the N first dual-band MUX 2101-210N. The dual-band WSS2201 can generate a first multiplexed signal for the first band and a second multiplexed signal for the second band based on the multiple first dual-band single-wave signals. For example, the dual-band WSS2201 can have N ports corresponding to the N first dual-band MUX 2101-210N for receiving the first dual-band single-wave signals. The dual-band WSS2201 can route single-wave signals of different bands and wavelengths to generate the first multiplexed signal and the second multiplexed signal.

[0029] According to one or more embodiments of this disclosure, the first band and the second band described in this application can be two of the following: original (O) band, extended (E) band, short (S) band, C band, L band, and ultra-long (U) band. For example, the first band can be the C band, and the second band can be the L band. For example, the dual-band WSS2201 can include a C+L band WSS, and the N first dual-band MUXs 2101-210N can include N C / L band MUXs.

[0030] According to one or more embodiments of the present disclosure, the optical transmission apparatus 2001 can generate a first multiplexed signal of the first band and a second multiplexed signal of the second band using only a single dual-band WSS 2201. Compared to optical transmission apparatuses using two WSSs, the use of one WSS can be reduced. Therefore, using a single WSS... Figure 1AThe optical transmission device 2001 has relatively low cost and failure rate.

[0031] Figure 1B A schematic diagram of an optical transmission device provided in at least one embodiment of the present disclosure is shown.

[0032] Reference Figure 1B Describe the process of optical reception performed by the optical transmission device 2002. For example... Figure 1B As shown, the optical transmission device 2002 may include N third dual-band MUX 2701-270N and dual-band WSS2201. Additionally or alternatively, the optical transmission device 2002 may also include... Figure 1A The N first dual-band MUX 2101-210N shown in the figure.

[0033] According to one or more embodiments of this disclosure, the dual-band WSS2201 can be connected to each of N third dual-band MUX2701-270N. The dual-band WSS2201 can receive a third multiplexed signal from a first band and a fourth multiplexed signal from a second band. The dual-band WSS2201 can generate multiple second dual-band single-wave signals (e.g., second dual-band single-wave signal 1 to second dual-band single-wave signal N) based on the third and fourth multiplexed signals. For example, the dual-band WSS2201 can have N ports corresponding to the N third dual-band MUX 2701-270N for transmitting the multiple second dual-band single-wave signals to the N third dual-band MUX 2701-270N respectively. The dual-band WSS2201 can route input multiplexed signals from different bands to generate multiple second dual-band single-wave signals.

[0034] According to one or more embodiments of this disclosure, each of the N third dual-band MUXs 2701-270N can receive a second dual-band single-wave signal from the dual-band WSS2201. For example, the third dual-band MUX 2701 can receive the second dual-band single-wave signal 1, the third dual-band MUX 2702 ( Figure 1B (Not shown in the image) can receive a second dual-band single-wave signal 2... The third dual-band MUX 270N can receive a second dual-band single-wave signal N. Each of the N third dual-band MUX 2701-270N can generate a third single-wave signal of the first band and a fourth single-wave signal of the second band from the second dual-band single-wave signal. For example, the third dual-band MUX 2701 can split the second dual-band single-wave signal 1 into a third single-wave signal 1 and a fourth single-wave signal 1, and the third dual-band MUX 2702 (... Figure 1B (not shown in the image) can transmit the second dual-band single-wave signal 2 ( Figure 1B (Not shown in the image) The waveform is divided into the third single-wavelength signal 2 and the fourth single-wavelength signal 2 (not shown in the image). Figure 1B(Not shown in the image)... The third dual-band MUX 270N can split the second dual-band single-wave signal N into a third single-wave signal N and a fourth single-wave signal N.

[0035] According to one or more embodiments of the present disclosure, the optical transmission apparatus 2002 can generate a third single-wavelength signal in the first band and a fourth single-wavelength signal in the second band using only a single dual-band WSS 2201. Compared to optical transmission apparatuses using two WSSs, the use of one WSS can be reduced. Therefore, using a single WSS... Figure 1A The optical transmission device 2001 has relatively low cost and failure rate.

[0036] According to one or more embodiments of this disclosure, the first band and the second band described in this application can be two of the following: original (O) band, extended (E) band, short (S) band, C band, L band, and ultra-long (U) band. For example, the first band can be the C band, and the second band can be the L band. For example, the dual-band WSS2201 can include a C+L band WSS, N first dual-band MUXs 2101-210N can include N C / L band MUXs, and N third dual-band MUXs 2701-270N can include N C / L band MUXs.

[0037] Figure 2A A schematic diagram of an optical transmission device provided in at least one embodiment of the present disclosure is shown. Figure 2A Zhongyu Figure 1A Components that are identical or similar will not be described again.

[0038] Reference Figure 2A Describe the process of light emission performed by the optical transmission device 3001. For example... Figure 2A As shown, the optical transmission device 3001 may include N sets of optical transponders (OT) 2001-200N, N first dual-band MUX 2101-210N, a dual-band WSS 2201, at least one set of boost amplifiers (BA) (e.g., first-band BA 2301, second-band BA 2302), and a second dual-band MUX 2401. Additionally or alternatively, the optical transmission device 3001 may also include... Figure 2B The N third dual-band MUX 2701-270N, at least one set of SGAs (e.g., first band SGA 2601, second band SGA 2602), and fourth dual-band MUX 2501 are shown.

[0039] According to one or more embodiments of this disclosure, N groups of OTs 2001-200N can be respectively connected to N first dual-band MUXs 2101-210N. Each group of OTs in the N groups of OTs 2001-200N may include a first-band OT (e.g., first-band OT2011-201N) and a second-band OT (e.g., second-band OT 2021-202N). That is, the N groups of OTs 2001-200N may include N first-band OTs 2011-201N and N second-band OTs 2021-202N.

[0040] According to one or more embodiments of this disclosure, N first-band OT 2011-201N can generate first-band single-wave signals of different wavelengths (e.g., Figure 1A The N first-band OT2011-201N can each perform photoelectric conversion operations. For example, each of the N first-band OT2011-201N can receive light of a certain wavelength from, for example, a user's router or laser transmitter, and convert the optical signal of that wavelength into an electrical signal. Each of the N first-band OT2011-201N can perform one or more of the following processes on the electrical signal: wavelength conversion, re-amplification, re-shaping, re-timing, etc., and convert the processed electrical signal into an optical signal, such as a first-band single-wave signal of the wavelength corresponding to the corresponding first-band OT. In this way, the N first-band OT2011-201N can send first-band single-wave signals of different wavelengths to the corresponding first dual-band MUX.

[0041] According to one or more embodiments of this disclosure, N second-band OTs 2021-202N can generate second-band single-wave signals of different wavelengths (e.g., second single-wave signal 1-second single-wave signal N in FIG. 2). Each of the N second-band OTs 2021-202N can perform photoelectric conversion operations. For example, each of the N second-band OTs 2021-202N can receive light of a certain wavelength from, for example, a user's router or laser transmitter, and convert the optical signal of that wavelength into an electrical signal. Each of the N second-band OTs 2021-202N can perform one or more of the following processes on the electrical signal: wavelength conversion, re-amplification, reshaping, re-timing, etc., and convert the processed electrical signal into an optical signal, such as a second-band single-wave signal of the wavelength corresponding to the corresponding second-band OT. In this way, the N second-band OTs 2021-202N can send second-band single-wave signals of different wavelengths to the corresponding first dual-band MUX.

[0042] According to one or more embodiments of the present disclosure, each of the N first dual-band MUX 2101-210N can receive a first single-wave signal of the first band and a second single-wave signal of the second band as described with reference to FIG2, and combine the first single-wave signal and the second single-wave signal into a first dual-band single-wave signal 1-first dual-band single-wave signal N.

[0043] According to one or more embodiments of the present disclosure, the dual-band WSS2201 can receive multiple first dual-band single-wave signals from N first dual-band MUX 2101-210N as described with reference to FIG2, and generate a first multiplexed signal of the first band and a second multiplexed signal of the second band based on the multiple first dual-band single-wave signals.

[0044] According to one or more embodiments of this disclosure, at least one set of BAs can be connected between a dual-band WSS2201 and a second dual-band MUX2401, the set of BAs including a first-band BA 2301 and a second-band BA 2302. The first-band BA 2301 and the second-band BA 2302 can be used to increase optical power, extend optical transmission distance, and compensate for optical losses in subsequent devices. The first-band BA 2301 can be configured to receive a first multiplexed signal from the dual-band WSS2201. The first-band BA 2301 can amplify the first multiplexed signal according to a first predetermined gain and send the amplified first multiplexed signal to the second dual-band MUX2401. The second-band BA 2302 can be configured to receive a second multiplexed signal from the dual-band WSS2202. The second-band BA 2302 can amplify the second multiplexed signal according to a second predetermined gain and send the amplified second multiplexed signal to the second dual-band MUX2401.

[0045] According to at least one embodiment of this disclosure, a second dual-band MUX 2401 can be connected to a dual-band WSS 2201. For example, the second dual-band MUX 2401 can be connected to the dual-band WSS 2201 via a set of BAs including a first band BA 2301 and a second band BA 2302. The second dual-band MUX 2401 can be configured to receive a first multiplexed signal and a second multiplexed signal from the dual-band WSS 2201. For example, the second dual-band MUX 2401 can be configured to receive an amplified first multiplexed signal and an amplified second multiplexed signal via a set of BAs. The second dual-band MUX 2401 can combine the first multiplexed signal and the second multiplexed signal into a first dual-band multiplexed signal. The second dual-band MUX 2401 can transmit the first dual-band multiplexed signal to a transmitting optical fiber line connected to the optical transmission device 3001 for optical communication.

[0046] Figure 2BA schematic diagram of an optical transmission device provided in at least one embodiment of the present disclosure is shown. Figure 2B Zhongyu Figure 1B Components that are identical or similar will not be described again.

[0047] Reference Figure 2B Describe the process of optical reception performed by the optical transmission device 3002. For example... Figure 2B As shown, the optical transmission device 3001 may include N sets of OT 2001-200N, N third dual-band MUX 2701-270N, a dual-band WSS 2201, at least one set of SGA (e.g., first-band SGA 2601, second-band SGA 2602), and a fourth dual-band MUX 2501. Additionally or alternatively, the optical transmission device 3002 may also include... Figure 2A The diagram shows N first dual-band MUX 2101-210N, at least one set of BAs (e.g., first band BA 2301, second band BA 2302), and second dual-band MUX 2401.

[0048] According to one or more embodiments of this disclosure, a fourth dual-band MUX 2501 can be connected to a dual-band WSS 2201. For example, the fourth dual-band MUX 2501 can be connected to the dual-band WSS 2201 via at least one set of SGAs, including a second band SGA 2602 comprising a first band SGA 2601. The fourth dual-band MUX 2501 can be configured to receive a second dual-band multiplexed signal for optical communication from a receiving optical fiber line connected to an optical transmission device. The fourth dual-band MUX 2501 can generate a third and a fourth multiplexed signal based on the second dual-band multiplexed signal and transmit the third and fourth multiplexed signals to the dual-band WSS 2201. For example, the fourth dual-band MUX 2501 can be configured to transmit amplified third and amplified fourth multiplexed signals via a set of SGAs.

[0049] According to one or more embodiments of this disclosure, a set of SGAs, including a first-band SGA 2601 and a second-band SGA 2602, can be connected between a dual-band WSS2201 and a fourth dual-band MUX 2501. The first-band SGA 2601 and the second-band SGA 2602 can be used to increase optical power and compensate for optical losses during transmission. The first-band SGA 2601 can be configured to receive a third multiplexed signal from the fourth dual-band MUX 2501. The first-band SGA 2601 can amplify the third multiplexed signal based on the losses in the receiving optical fiber line and send the amplified third multiplexed signal to the dual-band WSS2201. The second-band SGA 2602 can be configured to receive a fourth multiplexed signal from the fourth dual-band MUX 2501. The second-band SGA 2602 can amplify the fourth multiplexed signal based on the loss of the receiving optical fiber line, and send the amplified fourth multiplexed signal to the dual-band WSS2201.

[0050] According to one or more embodiments of this disclosure, N groups of OT 2001-200N can be respectively connected to N third dual-band MUX 2701-270N. As described above, the N groups of OT 2001-200N may include N first-band OT 2011-201N and N second-band OT 2021-202N.

[0051] According to one or more embodiments of this disclosure, N first-band OT 2011-201N can receive first-band single-wave signals of different wavelengths (e.g., Figure 1B The N first-band OT2011-201N signals can each perform photoelectric conversion operations. For example, each of the N first-band OT2011-201N signals can convert a first-band single-wave signal of a different wavelength into an electrical signal. Each of the N first-band OT2011-201N signals can perform one or more of the following processes on the electrical signal: wavelength conversion, re-amplification, reshaping, re-timing, etc., and convert the processed electrical signal into an optical signal for transmission to, for example, a user's router or photodetector.

[0052] According to one or more embodiments of this disclosure, N first-band OT 2011-201N can receive second-band single-wave signals of different wavelengths (e.g., Figure 1BThe N first-band OT2011-201N signals can each perform photoelectric conversion operations. For example, each of the N first-band OT2011-201N signals can convert second-band single-wave signals of different wavelengths into electrical signals. Each of the N first-band OT2011-201N signals can perform one or more of the following processes on the electrical signals: wavelength conversion, re-amplification, reshaping, re-timing, etc., and convert the processed electrical signals into optical signals for transmission to, for example, a user's router or photodetector.

[0053] Optical transmission devices 3001 and 3002 according to one or more embodiments of this disclosure can perform multiplexing and demultiplexing using only a single dual-band WSS 2201. This reduces the number of WSSs compared to optical transmission devices using two WSSs. Although optical transmission devices 3001 and 3002 according to one or more embodiments of this disclosure may use a number of MUXs (e.g., N first dual-band MUXs 2101-210N and N third dual-band MUXs 2701-270N), the MUXs are passive devices with extremely low cost and failure rate. Therefore, using a single WSS... Figure 1A The optical transmission device 2001 has relatively low cost and failure rate.

[0054] Figure 3A The schematic diagram illustrates a first-stage device of an optical transmission apparatus provided in at least one embodiment of the present disclosure. Figure 3A and Figure 1A-Figure 2B Components that are identical or similar to those described will not be described again.

[0055] According to one or more embodiments of this disclosure, the first-level device 4001 may include a single-wavelength interface, such as a first-band single-wavelength interface 411-41N and a second-band single-wavelength interface 421-42N. The first-level device 4001 can receive or transmit single-wavelength signals from the first-band OT (e.g., first-band OT 2011-201N) and the second-band OT (e.g., second-band OT 2021-202N) via the single-wavelength interface.

[0056] According to one or more embodiments of this disclosure, the first-level device 4001 may include MUXs, such as N first dual-band MUXs 2101-210N and N third dual-band MUXs 2701-270N. The first dual-band MUXs 2101-210N can receive single waves from the first band OT 2011-201N and the second band OT 2021-202N via a single-wave interface. The third dual-band MUXs 2701-270N can transmit single waves to the first band OT 2011-201N and the second band OT 2021-202N via a single-wave interface.

[0057] According to one or more embodiments of this disclosure, the first-stage device 4001 may include a multi-fiber push-on (MPO), such as an MPO 401-40N. The first dual-band MUX 2101-210N can connect to a second-stage device (hereinafter referred to as...) via the MPO401-40N. Figure 3B (Description) Transmits dual-band single-wave signals. The third dual-band MUX 2701-270N can transmit signals from the second-level device (see description) via MPO 401-40N. Figure 3B (Description) Sending dual-band single-wavelength signals.

[0058] Figure 3B The schematic diagram illustrates a second-stage device of an optical transmission apparatus provided in at least one embodiment of the present disclosure. Figure 3B and Figure 1A-Figure 2B Components that are identical or similar to those described will not be described again.

[0059] According to one or more embodiments of this disclosure, the second-level device 4002 may include MPOs 431-43N, which may be connected to MPOs 401-40N of the first-level device 4001. For example, the second-level device 4002 may receive or send dual-band single-wave signals to the first-level device 4001 via MPOs 431-43N. Additionally or alternatively, the second-level device 4002 may include single-wave interfaces 441-44N, which may be connected to corresponding OTs.

[0060] According to one or more embodiments of this disclosure, the second-level device 4002 may include a dual-band WSS 2201. The dual-band WSS 2201 can receive dual-band single-wave signals from or transmit dual-band single-wave signals to MPOs 431-43N. The second-level device 4002 may include at least one set of BAs (e.g., first-band BA 2301, second-band BA 2302), at least one set of SGAs (e.g., first-band SGA 2601, second-band SGA 2602), a second dual-band MUX 2401, and a fourth dual-band MUX 2501. The operation of the first-band BA 2301, second-band BA 2302, first-band SGA 2601, second-band SGA 2602, second dual-band MUX 2401, and fourth dual-band MUX 2501 can be referred to... Figure 1A-Figure 2B The description in the previous section will not be repeated here. The second-level device 4002 may include a multiplexing interface 491, through which the second-level device 4002 can send or receive dual-band multiplexed signals for optical communication.

[0061] According to one or more embodiments of this disclosure, the second-stage device 4002 may include an Amplified Spontaneous Emission (ASE) module 450. The ASE module 450 may be connected to the dual-band WSS 2201. The ASE module 450 may be configured to send a dual-band fill signal to the dual-band WSS when the number of multiple first dual-band single-wavelength signals (e.g., first dual-band single-wavelength signals received via MPO 431-43N) is below a threshold. In this way, fiber nonlinearity caused by power imbalance can be suppressed, optical amplifier gain can be stabilized, transient fluctuations in channel power can be avoided, and online monitoring of channels without traffic can be assisted, thereby ensuring the stability and performance of the entire optical transmission system. The ASE module 450 may include a first-band ASE submodule 451 that outputs a first fill signal for the first band and a second-band ASE submodule 453 that outputs a second fill signal for the second band. The first-band ASE submodule 451 and the second-band ASE submodule 453 can respectively send a first fill signal of the first band and a second fill signal of the second band to the fifth dual-band MUX 453. The fifth dual-band MUX 453 can be configured to generate a dual-band fill signal based on the first fill signal of the first band and the second fill signal of the second band.

[0062] According to one or more embodiments of this disclosure, the second-level device 4002 may include at least one set of optical channel monitors (OCMs), such as a first-band OCM 464 and a second-band OCM 462. For example, the first-band OCM 464 may receive multiplexed signals (e.g., a first multiplexed signal or a third multiplexed signal) of the first band from the first-band BA 2301 and the first-band SGA 2601 via an optical switch 463 to monitor the performance of the first multiplexed signal or the third multiplexed signal. For example, the second-band OCM 462 may receive multiplexed signals (e.g., a second multiplexed signal or a fourth multiplexed signal) of the second band from the second-band BA 2302 and the second-band SGA 2602 via an optical switch 461 to monitor the performance of the second multiplexed signal or the fourth multiplexed signal.

[0063] According to one or more embodiments of this disclosure, the second-level device 4002 may include an optical supervisory channel (OSC) 481. The OSC 481 may be configured to communicate management information about optical transmission with another optical transmission device connected to the optical transmission device. For example, the management information may include information about one or more functions such as performance monitoring, remote configuration, fault location, and network protection switching, but this disclosure is not limited thereto.

[0064] According to one or more embodiments of this disclosure, the second-stage device 4002 may include an optical time-domain reflectometer (OTDR) 471. The OTDR 471 can be connected to the transmitting fiber optic line and the receiving fiber optic line via an optical switch 472. The OTDR 471 can be configured to locate a fault point in at least one of the transmitting fiber optic line and the receiving fiber optic line connected to this optical transmission device (e.g., including the first-stage device 4001 and the second-stage device 4002). For example, the OTDR 471 can accurately locate the location of faults such as breakpoints and splices by emitting optical pulses into the fiber and analyzing the backscattered light signal, and measure fiber length, loss, and attenuation distribution, etc., but this disclosure is not limited thereto.

[0065] Figure 4 A flowchart illustrating a method for an optical transmission apparatus provided in at least one embodiment of this disclosure is shown schematically. Figure 4 As shown, method 500 includes steps S510-S540. The optical transmission device includes a plurality of first dual-band multiplexers (MUXs) and a dual-band wavelength selection switch (WSS) connected to the plurality of first dual-band MUXs.

[0066] In step S510, the first single-wave signal of the first band and the second single-wave signal of the second band can be received by each of the multiple first dual-band MUXs.

[0067] In step S520, the first single-wave signal and the second single-wave signal can be combined into a first dual-band single-wave signal by each of the multiple first dual-band MUXs.

[0068] In step S530, multiple first dual-band single-wave signals can be received from multiple first dual-band MUXs via a dual-band WSS.

[0069] In step S540, a first combined signal of the first band and a second combined signal of the second band can be generated based on multiple first dual-band single-wave signals using a dual-band WSS.

[0070] Figure 5 A flowchart illustrating a method for an optical transmission apparatus provided in at least one embodiment of this disclosure is shown schematically. Figure 5 As shown, method 600 includes steps S610-S640. The optical transmission device includes a dual-band wavelength selective switch (WSS) and a plurality of third dual-band multiplexers (MUXs) connected to the dual-band WSS.

[0071] In step S610, the third multiplexed signal of the first band and the fourth multiplexed signal of the second band can be received by the dual-band WSS.

[0072] In step S620, multiple second dual-band single-wave signals can be generated based on the third and fourth multiplexed signals using a dual-band WSS.

[0073] In step S630, multiple second dual-band single-wave signals can be sent to multiple third dual-band MUXs via dual-band WSS.

[0074] In step S640, a second dual-band single-wave signal can be received from a dual-band WSS through each of the multiple third dual-band MUXs.

[0075] In step S650, a third single-wave signal of the first band and a fourth single-wave signal of the second band can be generated by each of the multiple third dual-band MUXs based on the second dual-band single-wave signal.

[0076] At least one embodiment of this disclosure also provides an electronic device, including: a processing device; a storage device including one or more computer program modules; wherein the one or more computer program modules are stored in the storage device and configured to be executed by the processing device, and the one or more computer program modules are used to implement the method for an optical transmission device provided in any embodiment of this disclosure.

[0077] For example, the processing device may be a central processing unit (CPU), digital signal processor (DSP), image processor (GPU), general-purpose graphics processor (GPGPU), or other form of processing unit with data processing capabilities and / or instruction execution capabilities. It may be a general-purpose processor or a dedicated processor and may control other components in the electronic device to perform the desired functions.

[0078] For example, the storage device may include one or more computer program products, which may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory may, for example, include random access memory (RAM) and / or cache memory. The non-volatile memory may, for example, include read-only memory (ROM), hard disk, flash memory, etc. One or more computer program instructions may be stored on the computer-readable storage medium, which a processing device may execute to implement the functions (implemented by the processing device) in the embodiments of this disclosure and / or other desired functions, such as methods for optical transmission devices. Various application programs and various data, such as methods for optical transmission devices, may also be stored in the computer-readable storage medium, which is not limited in the embodiments of this disclosure.

[0079] The following is for reference. Figure 6The diagram illustrates a structural schematic of an electronic device (e.g., a terminal device or a server) 700 suitable for implementing embodiments of the present disclosure. The terminal device in the embodiments of the present disclosure may include, but is not limited to, mobile terminals such as mobile phones, laptops, digital broadcast receivers, PDAs (personal digital assistants), PADs (tablet computers), PMPs (portable multimedia players), in-vehicle terminals (e.g., in-vehicle navigation terminals), and fixed terminals such as digital TVs and desktop computers. Figure 6 The electronic device shown is merely an example and should not be construed as limiting the functionality and scope of the embodiments disclosed herein. Although not shown, electronic device 700 may include references to... Figures 1A-3B The optical transmission device described above, for example, can be included in the communication device 709.

[0080] like Figure 6 As shown, the electronic device 700 may include a processing unit (e.g., a central processing unit, a graphics processor, etc.) 701, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 702 or a program loaded from a storage device 708 into a random access memory (RAM) 703. The RAM 703 also stores various programs and data required for the operation of the electronic device 700. The processing unit 701, ROM 702, and RAM 703 are interconnected via a bus 704. An input / output (I / O) interface 705 is also connected to the bus 704.

[0081] Typically, the following devices can be connected to I / O interface 705: input devices 706 including, for example, touch screen, touchpad, keyboard, mouse, camera, microphone, accelerometer, gyroscope, etc.; output devices 707 including, for example, liquid crystal display (LCD), speaker, vibrator, etc.; storage devices 708 including, for example, magnetic tape, hard disk, etc.; and communication devices 709.

[0082] The communication device 709 allows the electronic device 700 to communicate wirelessly or wiredly with other devices (e.g., via optical communication) to exchange data. Although Figure 6 An electronic device 700 with various devices is shown; however, it should be understood that implementation or possession of all the devices shown is not required. More or fewer devices may be implemented or possessed alternatively. According to one embodiment of this disclosure, a communication device 709 may include references to… Figures 1A-3BThe described optical transmission apparatus includes, for example, an optical communication apparatus for transmitting light and an optical communication apparatus for receiving light. Electronic device 700 can be connected via communication device 709 to one or more of an optical transmission network, backbone network, core network, metropolitan area network, data center interconnection network, fiber optic access network, 5G fronthaul, midhaul, and backhaul network. For example, communication device 709, as an optical transmission apparatus, can be connected to transmitting and receiving fiber optic lines to transmit and receive dual-band multiplexed signals for optical communication. Additionally or alternatively, communication device 709 may also include a laser, photodetector, modem, etc., for generating light, but this disclosure is not limited thereto. The laser can generate an optical signal for carrying information based on an electrical signal. The photodetector can convert the received information-carrying optical signal into an electrical signal. The modem can encode information by changing the intensity, phase, or polarization of the optical signal; or it can reconstruct the encoded information by detecting the intensity, phase, or polarization of the light wave.

[0083] In particular, according to one or more embodiments of this disclosure, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, one or more embodiments of this disclosure include a computer program product comprising a computer program carried on a non-transitory computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via communication device 709, or installed from storage device 708, or installed from ROM 702. When the computer program is executed by processing device 701, it performs the functions defined above in the methods of the embodiments of this disclosure.

[0084] It should be noted that the computer-readable medium described in this disclosure can be a computer-readable signal medium or a computer-readable storage medium, or any combination thereof. A computer-readable storage medium can be, for example,—but not limited to—an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of a computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this disclosure, a computer-readable storage medium can be any tangible medium containing or storing a program that can be used by or in connection with an instruction execution system, apparatus, or device. In this disclosure, a computer-readable signal medium can include a data signal propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such propagated data signals can take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. A computer-readable signal medium can be any computer-readable medium other than a computer-readable storage medium, which can send, propagate, or transmit a program for use by or in connection with an instruction execution system, apparatus, or device. The program code contained on the computer-readable medium can be transmitted using any suitable medium, including but not limited to: wires, optical fibers, RF (radio frequency), etc., or any suitable combination thereof.

[0085] In some implementations, clients and servers can communicate using any currently known or future-developed network protocol such as HTTP (Hypertext Transfer Protocol) and can interconnect with digital data communications (e.g., communication networks) of any form or medium. Examples of communication networks include optical transport networks, backbone networks, core networks, metropolitan area networks, data center interconnect networks, fiber optic access networks, 5G fronthaul, midhaul and backhaul networks, local area networks (“LANs”), wide area networks (“WANs”), the Internet (e.g., the Internet), and end-to-end networks (e.g., ad hoc end-to-end networks), as well as any currently known or future-developed networks.

[0086] The aforementioned computer-readable medium may be included in the aforementioned electronic device; or it may exist independently and not assembled into the electronic device.

[0087] The aforementioned computer-readable medium carries one or more programs that, when executed by the electronic device, cause the electronic device to: receive a first single-wave signal of a first band and a second single-wave signal of a second band via each of a plurality of first dual-band MUXs; combine the first single-wave signal and the second single-wave signal into a first dual-band single-wave signal via each of the plurality of first dual-band MUXs; receive a plurality of first dual-band single-wave signals from the plurality of first dual-band MUXs via a dual-band WSS; and generate a first combined signal of the first band and a second band based on the plurality of first dual-band single-wave signals via the dual-band WSS. The second multiplexed signal; or the electronic device: receives a third multiplexed signal of the first band and a fourth multiplexed signal of the second band via a dual-band WSS; the dual-band WSS generates a plurality of second dual-band single-wave signals based on the third multiplexed signal and the fourth multiplexed signal; the dual-band WSS transmits the plurality of second dual-band single-wave signals to a plurality of third dual-band MUXs respectively; receives the second dual-band single-wave signal from the dual-band WSS through each of the plurality of third dual-band MUXs; and generates a third single-wave signal of the first band and a fourth single-wave signal of the second band based on the second dual-band single-wave signal through each of the plurality of third dual-band MUXs.

[0088] Computer program code for performing the operations of this disclosure can be written in one or more programming languages ​​or a combination thereof, including but not limited to object-oriented programming languages ​​such as Java, Smalltalk, and C++, as well as conventional procedural programming languages ​​such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a local area network (LAN) or a wide area network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0089] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this disclosure. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0090] The units or modules described in the embodiments of this disclosure can be implemented in software or hardware. The names of the units or modules do not necessarily constitute a limitation on the unit or module itself.

[0091] The functions described above in this document can be performed, at least in part, by one or more hardware logic components. For example, exemplary types of hardware logic components that can be used, without limitation, include: Field Programmable Gate Arrays (FPGAs), Application-Specific Integrated Circuits (ASICs), Application Standard Products (ASSPs), System-on-Chip (SoCs), Complex Programmable Logic Devices (CPLDs), and so on.

[0092] In the context of this disclosure, a machine-readable medium can be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, apparatus, or device. A machine-readable medium can be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium can be, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination of the foregoing. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0093] One embodiment of this disclosure provides a non-transitory readable storage medium having computer instructions stored thereon that, when executed by a processor, perform one or more steps of the various methods and additional aspects described above.

[0094] For example, the non-temporarily readable storage medium may be any combination of one or more computer-readable storage media, such as a computer-readable storage medium containing program code for performing the various methods described above.

[0095] For example, when the program code is read by a computer, the computer can execute the program code stored in the computer storage medium to perform one or more steps of the various methods and additional aspects described above, such as those according to at least one embodiment of the present disclosure.

[0096] For example, the non-transitory readable storage medium may include a memory card of a smartphone, a storage component of a tablet computer, a hard disk of a personal computer, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), portable compact disc read-only memory (CD-ROM), flash memory, and other non-transitory readable storage media or any combination thereof.

[0097] One or more embodiments of this disclosure also provide a computer program product. The computer program product may include a computer program or instructions. When executed by a processor, the computer program or instructions can implement the methods described above, which will not be repeated here for the sake of brevity.

[0098] According to one or more embodiments of this disclosure, Example 1 provides an optical transmission device, comprising:

[0099] A plurality of first dual-band multiplexers (MUXs), wherein each of the plurality of first dual-band MUXs is configured as follows:

[0100] Receive the first single-wave signal of the first band and the second single-wave signal of the second band.

[0101] The first single-wave signal and the second single-wave signal are combined into a first dual-band single-wave signal; and

[0102] A dual-band wavelength selective switch (WSS) is connected to the plurality of first dual-band MUXs, wherein the dual-band WSS is configured as follows:

[0103] Receive multiple first dual-band single-wave signals from the multiple first dual-band MUXs

[0104] Based on the plurality of first dual-band single-wave signals, a first combined signal of the first band and a second combined signal of the second band are generated.

[0105] According to one or more embodiments of this disclosure, Example 2 provides an optical transmission device, wherein the optical transmission device in Example 1 further includes:

[0106] Multiple sets of optical transponders (OTs) are respectively connected to the multiple first dual-band MUXs, wherein each set of OTs includes:

[0107] The first band OT is configured to transmit the first single-wavelength signal to the first dual-band MUX corresponding to the first band OT; and

[0108] The second band OT is configured to send the second single-wave signal to the first dual-band MUX corresponding to the second band OT.

[0109] According to one or more embodiments of this disclosure, Example 3 provides an optical transmission device, wherein the optical transmission device of Example 1 further includes:

[0110] The second dual-band MUX, wherein the second dual-band MUX is connected to the dual-band WSS and is configured as follows:

[0111] Receive the first and second multiplexed signals from the dual-band WSS;

[0112] The first and second combined signals are combined into a first dual-band combined signal; and

[0113] The first dual-band multiplexed signal is sent to the transmitting optical fiber line connected to the optical transmission device.

[0114] According to one or more embodiments of this disclosure, Example 4 provides an optical transmission device, wherein the optical transmission device of Example 3 further includes:

[0115] At least one set of gain amplifiers (BAs), wherein the at least one set of BAs is connected between the dual-band WSS and the second dual-band MUX and includes:

[0116] The first band BA is configured to receive the first multiplexed signal from the dual-band WSS, amplify the first multiplexed signal according to a first predetermined gain, and send the amplified first multiplexed signal to the second dual-band MUX; and

[0117] The second band BA is configured to receive the second multiplexed signal from the dual-band WSS, amplify the second multiplexed signal according to a second predetermined gain, and send the amplified second multiplexed signal to the second dual-band MUX.

[0118] According to one or more embodiments of this disclosure, Example 5 provides an optical transmission device, wherein the optical transmission device of Example 1 further includes:

[0119] Multiple third dual-band MUXs are connected to the dual-band WSS.

[0120] The dual-band wavelength selective switch WSS is further configured as follows:

[0121] Receive the third multiplexed signal from the first band and the fourth multiplexed signal from the second band.

[0122] Based on the third and fourth multiplexed signals, multiple second dual-band single-wave signals are generated, and these multiple second dual-band single-wave signals are respectively sent to the multiple third dual-band MUXs; and

[0123] Each of the plurality of third dual-band multiplexers (MUX) is configured as follows:

[0124] Receive a second dual-band single-wave signal from the dual-band WSS.

[0125] The third single-wave signal of the first band and the fourth single-wave signal of the second band are generated based on the second dual-band single-wave signal.

[0126] According to one or more embodiments of this disclosure, Example Six provides an optical transmission device, wherein the one described in Example Five further includes:

[0127] A fourth dual-band MUX, wherein the fourth dual-band MUX is connected to the dual-band WSS and is configured as follows:

[0128] The second dual-band multiplexed signal is received from the receiving optical fiber line connected to the optical transmission device.

[0129] The third and fourth combined signals are generated based on the second dual-band combined signal; and

[0130] The third and fourth multiplexed signals are sent to the dual-band WSS.

[0131] According to one or more embodiments of this disclosure, Example 7 provides an optical transmission device, wherein the optical transmission device of Example 6 further includes:

[0132] At least one set of switchable gain amplifiers (SGAs), wherein the at least one set of SGAs is connected between the dual-band WSS and the fourth dual-band MUX and includes:

[0133] The first-band SGA is configured to receive the third multiplexed signal from the fourth dual-band MUX, amplify the third multiplexed signal based on the loss of the receiving optical fiber line, and send the amplified third multiplexed signal to the dual-band WSS; and

[0134] The second band SGA is configured to receive the fourth multiplexed signal from the fourth dual-band MUX, amplify the fourth multiplexed signal based on the loss of the receiving optical fiber line, and send the amplified fourth multiplexed signal to the dual-band WSS.

[0135] According to one or more embodiments of this disclosure, Example Eight provides an optical transmission device, wherein the optical transmission device of Example One further includes: an amplified spontaneous emission (ASE) module, wherein the ASE module is connected to the dual-band WSS and configured to:

[0136] When the number of the plurality of first dual-band single-wave signals is less than a threshold, a dual-band filling signal is sent to the dual-band WSS.

[0137] According to one or more embodiments of this disclosure, Example 9 provides an optical transmission device, wherein the optical transmission device of Example 8 includes, wherein the ASE module comprises:

[0138] The first-band ASE submodule is configured to output the first fill signal of the first band.

[0139] The second-band ASE submodule is configured to output the second fill signal of the second band.

[0140] The fifth dual-band MUX is configured to generate a dual-band filling signal based on the first filling signal of the first band and the second filling signal of the second band.

[0141] According to one or more embodiments of this disclosure, Example 10 provides an optical transmission device, wherein the optical transmission device in any of Examples 1 to 9 further includes:

[0142] At least one set of optical channel monitors (OCMs), wherein the at least one set of OCMs includes:

[0143] The first band OCM is configured to monitor the performance of the first multiplexed signal; and

[0144] The second band OCM is configured to monitor the performance of the second combined signal.

[0145] According to one or more embodiments of this disclosure, Example 11 provides an optical transmission device, wherein the optical transmission device in any of Examples 1 to 9 further includes:

[0146] Optical monitoring channel (OSC), wherein the OSC is configured as follows:

[0147] It communicates with another optical transmission device connected to the optical transmission device about management information regarding optical transmission.

[0148] According to one or more embodiments of this disclosure, Example Twelve provides an optical transmission device, wherein the optical transmission device in any of Examples One to Nine further includes:

[0149] An optical time domain reflectometer (OTDR), wherein the OTDR is configured as follows:

[0150] Locate the fault point of at least one of the transmitting optical fiber line and the receiving optical fiber line connected to the optical transmission device.

[0151] According to one or more embodiments of this disclosure, Example Thirteen provides an optical transmission device, wherein the optical transmission device in any of Examples One to Nine includes a dual-band WSS comprising a conventional C-band extended L-band WSS.

[0152] According to one or more embodiments of this disclosure, Example Fourteen provides an optical transmission device including a dual-band wavelength selective switch (WSS) and a plurality of third dual-band multiplexers (MUXs) connected to the dual-band WSS, wherein:

[0153] The dual-band WSS is configured as follows:

[0154] Receive the third multiplexed signal from the first band and the fourth multiplexed signal from the second band.

[0155] Based on the third and fourth multiplexed signals, multiple second dual-band single-wave signals are generated, and these multiple second dual-band single-wave signals are respectively sent to the multiple third dual-band MUXs; and

[0156] Each of the plurality of third dual-band MUXs is configured as follows:

[0157] Receive a second dual-band single-wave signal from the dual-band WSS.

[0158] The third single-wave signal of the first band and the fourth single-wave signal of the second band are generated based on the second dual-band single-wave signal.

[0159] According to one or more embodiments of this disclosure, Example Fifteen provides a method for an optical transmission device, the optical transmission device including a plurality of first dual-band multiplexers (MUXs) and a dual-band wavelength selective switch (WSS) connected to the plurality of first dual-band MUXs, the method comprising:

[0160] Each of the plurality of first dual-band MUXs receives a first single-wave signal of the first band and a second single-wave signal of the second band.

[0161] The first single-wave signal and the second single-wave signal are combined into a first dual-band single-wave signal by each of the plurality of first dual-band MUXs;

[0162] The dual-band WSS receives multiple first dual-band single-wave signals from the multiple first dual-band MUXs.

[0163] Using the dual-band WSS, a first combined signal of the first band and a second combined signal of the second band are generated based on the plurality of first dual-band single-wave signals.

[0164] According to one or more embodiments of this disclosure, Example Sixteen provides a method for an optical transmission device, the optical transmission device including a dual-band wavelength selective switch (WSS) and a plurality of third dual-band multiplexers (MUXs) connected to the dual-band WSS, the method comprising:

[0165] The dual-band WSS receives the third multiplexed signal of the first band and the fourth multiplexed signal of the second band.

[0166] The dual-band WSS generates multiple second dual-band single-wave signals based on the third and fourth multiplexed signals.

[0167] The dual-band WSS transmits multiple second dual-band single-wave signals to the multiple third dual-band MUX respectively.

[0168] Receive a second dual-band single-wave signal from the dual-band WSS through each of the plurality of third dual-band MUXs; and

[0169] The third single-wave signal of the first band and the fourth single-wave signal of the second band are generated by each of the plurality of third dual-band MUXs based on the second dual-band single-wave signal.

[0170] According to one or more embodiments of the present disclosure, Example Seventeen provides an electronic device including an optical transmission device as described in any one of Examples 1-13 or an optical transmission device as described in Example Fourteen.

[0171] The above description is merely a preferred embodiment of this disclosure and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of this disclosure is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features disclosed in this disclosure that have similar functions.

[0172] Furthermore, while the operations are described in a specific order, this should not be construed as requiring these operations to be performed in the specific order shown or in a sequential order. In certain environments, multitasking and parallel processing may be advantageous. Similarly, while several specific implementation details are included in the above discussion, these should not be construed as limiting the scope of this disclosure. Certain features described in the context of individual embodiments may also be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment may also be implemented individually or in any suitable sub-combination in multiple embodiments.

[0173] Although the subject matter has been described using language specific to structural features and / or methodological logic, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. Rather, the specific features and actions described above are merely illustrative examples of implementing the claims.

Claims

1. An optical transmission device, comprising: Multiple first dual-band multiplexers (MUXs), wherein each of the multiple first dual-band MUXs is configured as follows: Receive the first single-wave signal of the first band and the second single-wave signal of the second band. The first single-wave signal and the second single-wave signal are combined into a first dual-band single-wave signal; and A dual-band wavelength selective switch (WSS) is connected to the plurality of first dual-band MUXs, wherein the dual-band WSS is configured as follows: Receive multiple first dual-band single-wave signals from the multiple first dual-band MUXs By routing the plurality of first dual-band single-wave signals, a first combined signal of the first band and a second combined signal of the second band are generated.

2. The optical transmission device according to claim 1, further comprising: Multiple sets of optical transponders (OTs) are respectively connected to the multiple first dual-band MUXs, wherein each set of OTs includes: The first band OT is configured to transmit the first single-wavelength signal to the first dual-band MUX corresponding to the first band OT; and The second band OT is configured to send the second single-wave signal to the first dual-band MUX corresponding to the second band OT.

3. The optical transmission device according to claim 1, further comprising: The second dual-band MUX, wherein the second dual-band MUX is connected to the dual-band WSS and is configured as follows: Receive the first and second multiplexed signals from the dual-band WSS; The first and second combined signals are combined into a first dual-band combined signal; and The first dual-band multiplexed signal is sent to the transmitting optical fiber line connected to the optical transmission device.

4. The optical transmission device according to claim 3, further comprising: At least one set of gain amplifiers (BAs), wherein the at least one set of BAs is connected between the dual-band WSS and the second dual-band MUX and includes: The first band BA is configured to receive the first multiplexed signal from the dual-band WSS, amplify the first multiplexed signal according to a first predetermined gain, and send the amplified first multiplexed signal to the second dual-band MUX; and The second band BA is configured to receive the second multiplexed signal from the dual-band WSS, amplify the second multiplexed signal according to a second predetermined gain, and send the amplified second multiplexed signal to the second dual-band MUX.

5. The optical transmission device according to claim 1, further comprising: Multiple third dual-band MUXs are connected to the dual-band WSS. The dual-band wavelength selective switch WSS is further configured as follows: Receive the third multiplexed signal from the first band and the fourth multiplexed signal from the second band. Based on the third and fourth combined signals, multiple second dual-band single-wave signals are generated. Multiple second dual-band single-wave signals are respectively sent to the multiple third dual-band MUX; and Each of the plurality of third dual-band multiplexers (MUX) is configured as follows: Receive a second dual-band single-wave signal from the dual-band WSS. The third single-wave signal of the first band and the fourth single-wave signal of the second band are generated based on the second dual-band single-wave signal.

6. The optical transmission device according to claim 5, further comprising: A fourth dual-band MUX, wherein the fourth dual-band MUX is connected to the dual-band WSS and is configured as follows: The second dual-band multiplexed signal is received from the receiving optical fiber line connected to the optical transmission device. The third and fourth combined signals are generated based on the second dual-band combined signal; and The third and fourth multiplexed signals are sent to the dual-band WSS.

7. The optical transmission device according to claim 6, further comprising: At least one set of switchable gain amplifiers (SGAs), wherein at least one set of SGAs is connected between the dual-band WSS and the fourth dual-band MUX and includes: The first-band SGA is configured to receive the third multiplexed signal from the fourth dual-band MUX, amplify the third multiplexed signal based on the loss of the receiving optical fiber line, and send the amplified third multiplexed signal to the dual-band WSS; and The second band SGA is configured to receive the fourth multiplexed signal from the fourth dual-band MUX, amplify the fourth multiplexed signal based on the loss of the receiving optical fiber line, and send the amplified fourth multiplexed signal to the dual-band WSS.

8. The optical transmission device according to claim 1, further comprising: Amplify the spontaneous emission ASE module, wherein the ASE module is connected to the dual-band WSS and is configured as follows: When the number of the plurality of first dual-band single-wave signals is less than a threshold, a dual-band filling signal is sent to the dual-band WSS.

9. The optical transmission device according to claim 8, wherein, The ASE module includes: The first band ASE submodule is configured to output the first fill signal of the first band; The second-band ASE submodule is configured to output the second fill signal of the second band; The fifth dual-band MUX is configured to generate a dual-band filling signal based on the first filling signal of the first band and the second filling signal of the second band.

10. The optical transmission device according to any one of claims 1-9, further comprising: At least one set of Optical Channel Monitors (OCMs), wherein at least one set of OCMs includes: The first band OCM is configured to monitor the performance of the first multiplexed signal; and The second band OCM is configured to monitor the performance of the second combined signal.

11. The optical transmission device according to any one of claims 1-9, further comprising: Optical monitoring channel (OSC), wherein the OSC is configured as follows: It communicates with another optical transmission device connected to the optical transmission device about management information regarding optical transmission.

12. The optical transmission device according to any one of claims 1-9, further comprising: An optical time domain reflectometer (OTDR), wherein the OTDR is configured as follows: Locate the fault point of at least one of the transmitting optical fiber line and the receiving optical fiber line connected to the optical transmission device.

13. The optical transmission device according to any one of claims 1-9, wherein, The dual-band WSS includes a conventional C-band extended L-band WSS.

14. An optical transmission device, comprising a dual-band wavelength selective switch (WSS) and a plurality of third dual-band multiplexers (MUXs) connected to the dual-band WSS, wherein: The dual-band WSS is configured as follows: Receive the third multiplexed signal from the first band and the fourth multiplexed signal from the second band. By routing the third and fourth multiplexed signals, multiple second dual-band single-wave signals are generated. Multiple second dual-band single-wave signals are respectively transmitted to multiple third dual-band MUXs; and Each of the plurality of third dual-band MUXs is configured as follows: Receive a second dual-band single-wave signal from the dual-band WSS. The third single-wave signal of the first band and the fourth single-wave signal of the second band are generated based on the second dual-band single-wave signal.

15. A method for an optical transmission apparatus, the optical transmission apparatus comprising a plurality of first dual-band multiplexers (MUXs) and a dual-band wavelength selective switch (WSS) connected to the plurality of first dual-band MUXs, the method comprising: Each of the plurality of first dual-band MUXs receives a first single-wave signal of the first band and a second single-wave signal of the second band. The first single-wave signal and the second single-wave signal are combined into a first dual-band single-wave signal by each of the plurality of first dual-band MUXs; Multiple first dual-band single-wave signals are received from the multiple first dual-band MUXs via dual-band WSS; By routing the plurality of first dual-band single-wave signals using the dual-band WSS, a first multiplexed signal of the first band and a second multiplexed signal of the second band are generated.

16. A method for an optical transmission apparatus, the optical transmission apparatus comprising a dual-band wavelength selective switch (WSS) and a plurality of third dual-band multiplexers (MUXs) connected to the dual-band WSS, the method comprising: The dual-band WSS receives the third multiplexed signal of the first band and the fourth multiplexed signal of the second band. By routing the third and fourth multiplexed signals using the dual-band WSS, multiple second dual-band single-wave signals are generated. The dual-band WSS transmits multiple second dual-band single-wave signals to multiple third dual-band MUXs respectively. Receive a second dual-band single-wave signal from the dual-band WSS through each of the plurality of third dual-band MUXs; and The third single-wave signal of the first band and the fourth single-wave signal of the second band are generated by each of the plurality of third dual-band MUXs based on the second dual-band single-wave signal.

17. An electronic device comprising an optical transmission device as claimed in any one of claims 1-13 or an optical transmission device as claimed in claim 14.

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