Abstract: An OLT performs interactive authentication with an optical module, and determines a time sequence parameter of the optical module. The optical module stores the time sequence parameter in a register of the optical module. When the optical module is inserted into the OLT and is in a working state, the OLT reads the time sequence parameter stored in the optical module. Then, based on the time sequence parameter, the OLT determines and configures time sequence information of an ONU corresponding to the optical module.

Abstract: This application provides example optical communications apparatuses. One example optical communications apparatus includes a control apparatus and an optical module matching apparatus. The control apparatus can output a first control signal to the control end. An input end of the optical module matching apparatus can connect to a first optical module and receive a first electrical signal output by the first optical module. An output end of the optical module matching apparatus can output a first serial signal. The control apparatus can output a second control signal to the control end. The input end of the optical module matching apparatus can receive a second electrical signal output by the second optical module. The output end of the optical module matching apparatus can output a second serial signal. The first electrical signal and the second electrical signal can have different level types.

Abstract: The present disclosure relates to the field of optical communications. A board is disclosed. The board includes a level adjustment circuit, a detection apparatus, and a control apparatus. The detection apparatus is configured to: when the detection apparatus is connected to an optical module, receive an indication signal output by an upstream optical signal detection pin; continuously detect a received first level signal and the received indication signal. If there is a second level signal, opposite to the first level signal, the detection apparatus notifies the control apparatus that the optical module is inserted. If there is no second level signal in the signal received within the preset duration, the detection apparatus notifies the control apparatus that the optical module is absent. This makes the optical module less dependent on the in-position pin, and decreases a quantity of pins of the optical module.

Abstract: This application provides example optical communications apparatuses. One example optical communications apparatus includes a control apparatus and an optical module matching apparatus. The control apparatus can output a first control signal to the control end. An input end of the optical module matching apparatus can connect to a first optical module and receive a first electrical signal output by the first optical module. An output end of the optical module matching apparatus can output a first serial signal. The control apparatus can output a second control signal to the control end. The input end of the optical module matching apparatus can receive a second electrical signal output by the second optical module. The output end of the optical module matching apparatus can output a second serial signal. The first electrical signal and the second electrical signal can have different level types.

Abstract: Optical time domain reflectometers and optical subassemblies haying optical tine domain reflectometry functions are provided. In one aspect, an optical time domain reflectometer includes a base and a light splitting film disposed on the base, and the light splitting film includes a first side corresponding to a transmission region and a second, opposite side corresponding to a reflection region. The optical time domain reflectometer further includes a laser and a detector that are respectively located on the transmission region and the reflection region. The light splitting film is configured to: reflect or transmit laser light emitted by the laser out of the base, and reflect or transmit a part of the laser light reflected or scattered by an optical fiber to the detector.

Abstract: This application provides an optical component including a base, a light splitting structure, a first filter, and a collimation lens, where a first optical signal on a first path is incident on a light splitting surface of the first filter through a light inlet/outlet; the light splitting surface of the first filter reflects the first optical signal to the collimation lens along a second path, where the collimation lens disposed on the second path is configured to convert the first optical signal on the second path into parallel light; and the first optical signal includes a signal of at least one type of wavelength, and the light splitting structure is disposed on an emergent path of the first optical signal after the first optical signal passes through the collimation lens, and is configured to output, based on the wavelength type, the first optical signal adjusted by the collimation lens.

Abstract: The present disclosure relates to the field of optical communications. A board is disclosed. The board includes a level adjustment circuit, a detection apparatus, and a control apparatus. The detection apparatus is configured to: when the detection apparatus is connected to an optical module, receive an indication signal output by an upstream optical signal detection pin; continuously detect a received first level signal and the received indication signal. If there is a second level signal, opposite to the first level signal, the detection apparatus notifies the control apparatus that the optical module is inserted. If there is no second level signal in the signal received within the preset duration, the detection apparatus notifies the control apparatus that the optical module is absent. This makes the optical module less dependent on the in-position pin, and decreases a quantity of pins of the optical module.

Abstract: A single-fiber bidirectional sub assembly includes a base, a laser, an optical receiver, a wavelength splitter, and a sealing cover with a lens. The base includes a surface, an accommodation groove is disposed on the surface, the accommodation groove includes a groove bottom wall parallel to the surface, a wavelength division surface is disposed in the wavelength splitter, the optical receiver is disposed on the groove bottom wall, the wavelength splitter is disposed in the accommodation groove, and shields the optical receiver, the laser is located on one side of the accommodation groove, and the wavelength division surface faces the laser, and an included angle is formed between the wavelength division surface and the groove bottom wall on which the optical receiver is located; and the sealing cover covers the base, and accommodates the laser, the optical receiver, and the wavelength splitter.

Abstract: A bidirectional optical sub assembly includes a base made of a conducting material, and the base has a first part and a second part. An input port transmits a first electrical signal to a transmitter, the transmitter converts the first electrical signal into a first optical signal, and transmits the first optical signal to a wavelength division multiplexing element. A wavelength division multiplexing element reflects an optical signal of a first wavelength, or transmits an optical signal of a second wavelength different from the first wavelength. The wavelength division multiplexing element reflects the first optical signal, and transmits a second optical signal to a receiver. The receiver converts the second optical signal into a second electrical signal, and outputs the second electrical signal using an output port. An isolation element electromagnetically isolates the receiver from the transmitter.