Various embodiments are disclosed herein with generally relate to an optical communication system using a photonic lantern. In at least one embodiment, the optical system comprises: an optical transmitter coupled to a signal transmitting path; an optical receiver coupled to a signal receiving path; a photonic lantern, the photonic lantern extending between a first open end and a second open end, the first end comprising an opening to a single multi-mode fiber, and the second end comprising a plurality of single mode fibers that are adiabatically coupled to the multi-mode fiber, the plurality of single-mode fibers includes a single-mode fiber adapted to carry a fundamental optical mode and the remaining single-mode fibers adapted to carry higher-order optical modes, wherein, the single-mode fiber is coupled to the optical transmitting path, the remaining single-mode fibers are coupled to the optical receiving path.

An asymmetric bidirectional optical wireless communication system based on orbital angular momentum comprises a system end device and a client end device. The system can split light into P-polarization beam and S-polarization beam, and utilize the orbital angular momentum multiplexing technology to increase the system capacity for uplink transmission in the client end device. In addition, the system also uses the combination of a beam homogenizer and a spatial light modulator to design an orbital angular momentum multiplexer with low energy loss, which can increase the number of orbital angular momentum channels by increasing the effective area of the components.

Optical communication modules and associated methods and computer program products for performing network communication security are provided. An example optical module includes a substrate, a first optoelectronic component supported by the substrate configured for operation with optical signals having a first wavelength, and a second optoelectronic component supported by the substrate configured for operation with optical signals having a second wavelength. The module further includes an optical communication medium defining a first end in optical communication with the first optoelectronic component and the second optoelectronic component and a second end. The module also includes security circuitry operably connected with the first optoelectronic component and the second optoelectronic component. The security circuitry determines the presence of a noncompliant component coupled with the optical communication medium at the second end based upon operation of the second optoelectronic component.

Optical communication modules and associated methods and computer program products for performing network communication security are provided. An example optical module includes a substrate, a first optoelectronic component supported by the substrate configured for operation with optical signals having a first wavelength, and a second optoelectronic component supported by the substrate configured for operation with optical signals having a second wavelength. The module further includes an optical communication medium defining a first end in optical communication with the first optoelectronic component and the second optoelectronic component and a second end. The module also includes security circuitry operably connected with the first optoelectronic component and the second optoelectronic component. The security circuitry determines the presence of a noncompliant component coupled with the optical communication medium at the second end based upon operation of the second optoelectronic component.

An object is to provide an optical repeater that improves the fault tolerance of a plurality of excitation light sources while sharing the excitation light sources among a plurality of optical fibers. An optical repeater (100) includes excitation light sources (S1-S5), optical amplification units (A1-A5), and an optical distribution unit (10). The optical amplification units (A1-A5) amplify optical signals by using lights output from the excitation light sources (S1-S5). The optical distribution unit (10) includes a plurality of optical multiplexing/demultiplexing units. The optical distribution unit (10) is configured in such a manner that the lights from the four different excitation light sources in the excitation light sources (S1-S5) to be input to each of the light amplification units (A1-A5).

An object is to provide an optical repeater that improves the fault tolerance of a plurality of excitation light sources while sharing the excitation light sources among a plurality of optical fibers. An optical repeater (100) includes excitation light sources (S1-S5), optical amplification units (A1-A5), and an optical distribution unit (10). The optical amplification units (A1-A5) amplify optical signals by using lights output from the excitation light sources (S1-S5). The optical distribution unit (10) includes a plurality of optical multiplexing/demultiplexing units. The optical distribution unit (10) is configured in such a manner that the lights from the four different excitation light sources in the excitation light sources (S1-S5) to be input to each of the light amplification units (A1-A5).

Embodiments of the present application disclose an optical fiber connection detection method and a related device. A first network device obtains first label information, which indicates a target optical output interface, and the target optical output interface is one of at least one optical output interface of the first network device; the first network device generates an optical signal, where a wavelength of the optical signal is within a wavelength range corresponding to the target optical output interface; the first network device modulates the first label information onto the optical signal, to generate a modulated optical signal; and the first network device sends the modulated optical signal from the target optical output interface to a target optical input interface of a second network device, to detect an optical fiber connection relationship between the target optical output interface and the target optical input interface.

Embodiments of the present application disclose an optical fiber connection detection method and a related device. A first network device obtains first label information, which indicates a target optical output interface, and the target optical output interface is one of at least one optical output interface of the first network device; the first network device generates an optical signal, where a wavelength of the optical signal is within a wavelength range corresponding to the target optical output interface; the first network device modulates the first label information onto the optical signal, to generate a modulated optical signal; and the first network device sends the modulated optical signal from the target optical output interface to a target optical input interface of a second network device, to detect an optical fiber connection relationship between the target optical output interface and the target optical input interface.

In some examples, high speed bidirectional OTDR-based testing may include transmitting data from a first end of a device under test (DUT) towards an optical time-domain reflectometer (OTDR) that is operatively connected to a second opposite end of the DUT. Further data that is transmitted by the OTDR may be received from the second opposite end of the DUT towards the first end of the DUT. Based on an amplitude of the further data, a direction of receiving of the further data may be adjusted towards a first receiver or towards a second receiver.

In some examples, high speed bidirectional OTDR-based testing may include transmitting data from a first end of a device under test (DUT) towards an optical time-domain reflectometer (OTDR) that is operatively connected to a second opposite end of the DUT. Further data that is transmitted by the OTDR may be received from the second opposite end of the DUT towards the first end of the DUT. Based on an amplitude of the further data, a direction of receiving of the further data may be adjusted towards a first receiver or towards a second receiver.