Abstract: The present disclosure provides an optical integrated device and an optical time domain reflectometer. The optical integrated device includes: a packaging outer shell, a first collimator, an optical splitting device, a circulator assembly and a second collimator. The optical splitting device is provided close to the first collimator, is used to reflect a part of the detecting light from the first pigtail and couple the part of the detecting light to the third pigtail, and allows the other part of the detecting light to pass through the optical splitting device. The circulator assembly is provided close to the optical splitting device, the circulator assembly is used to couple the detecting light passing through the optical splitting device to the second pigtail, and couple the detecting light returned from the second pigtail to the third pigtail.

Abstract: This application provides a trace chain information query method, including: receiving, by a trace chain server, first trace chain information sent by a first service node and second trace chain information sent by a second service node, where the first service node is a service node in a first trace chain, the second service node is a service node in a second trace chain, both the first trace chain and the second trace chain are generated as triggered by a same user operation, the first trace chain information includes a group identifier, the second trace chain information includes the group identifier, and the group identifier is used to indicate the user operation; and finding, by the trace chain server, the first trace chain information and the second trace chain information based on the group identifier.

Abstract: The present disclosure provides an optical circulator. The optical circulator includes a first integrated module, a second integrated module and a third integrated module which are sequentially connected from front to rear. The first integrated module includes a mating shell, an optical fiber ferrule received in the mating shell and a first birefringence crystal attached to a rear surface of the optical fiber ferrule; the second integrated module comprises a first tube fixed behind the mating shell, a magnetic ring received in the first tube, a Wollaston prism fixed in the magnetic ring, two Faraday rotators respectively provided to both sides of the Wollaston prism, and two collimating lenses respectively provided to both sides of the two Faraday rotators. The third integrated module includes a second tube fixed behind the first tube, a dual fiber pigtail received in the second tube, and a second birefringence crystal attached to a front surface of the dual fiber pigtail.

Abstract: This application provides a trace chain information query method, including: receiving, by a trace chain server, first trace chain information sent by a first service node and second trace chain information sent by a second service node, where the first service node is a service node in a first trace chain, the second service node is a service node in a second trace chain, both the first trace chain and the second trace chain are generated as triggered by a same user operation, the first trace chain information includes a group identifier, the second trace chain information includes the group identifier, and the group identifier is used to indicate the user operation; and finding, by the trace chain server, the first trace chain information and the second trace chain information based on the group identifier.

Abstract: The present disclosure provides an optical integrated device and an optical time domain reflectometer. The optical integrated device includes: a packaging outer shell, a first collimator, an optical splitting device, a circulator assembly and a second collimator. The optical splitting device is provided close to the first collimator, is used to reflect a part of the detecting light from the first pigtail and couple the part of the detecting light to the third pigtail, and allows the other part of the detecting light to pass through the optical splitting device. The circulator assembly is provided close to the optical splitting device, the circulator assembly is used to couple the detecting light passing through the optical splitting device to the second pigtail, and couple the detecting light returned from the second pigtail to the third pigtail.

Abstract: The present disclosure provides an optical fiber ferrule adapter. The optical fiber ferrule adapter comprises a first ceramic ferrule, an output optical fiber assembly, and a first collimating lens, a second collimating lens, a half wave plate, a Faraday rotator, a first birefringence member and a second birefringence member which are provided between the first ceramic ferrule and the output optical fiber assembly. The first birefringence member is adjacent to the first ceramic ferrule, the second birefringence member is adjacent to the output optical fiber assembly; the first collimating lens, the second collimating lens, the Faraday rotator and the half wave plate are arranged between the first birefringence member and the second birefringence member; the Faraday rotator is positioned between the first collimating lens and the second collimating lens. The optical fiber ferrule adapter can isolate a reverse light and have a smaller structural dimension, which meets the trend of miniaturization.

Abstract: An optical module includes an optical fiber component, a wavelength division multiplexing (WDM) filter, at least one isolator, a mirror and an optical detecting component. The optical fiber component, the WDM filter, the at least one isolator, the mirror and the optical detecting component are configured to prevent a signal light which is before an EDF component and an amplified signal light after the EDF component from counter transmission with a simplified structure and compact size.

Abstract: Techniques of playing back a looping video file involve providing multiple video codecs for decoding a video file. Each video codec performs its own decoding operation on the looping video file, resulting in multiple buffers of video frames and a buffer of audio frames. Then, as the GPU renders the ending video frames from a first buffer, it begins rendering the beginning video frames from a second buffer. In this way, the beginning of a next video cycle is already rendered for viewing by the time a current video cycle is ending.

Abstract: Techniques of playing back a looping video file involve providing multiple video codecs for decoding a video file. Each video codec performs its own decoding operation on the looping video file, resulting in multiple buffers of video frames and a buffer of audio frames. Then, as the GPU renders the ending video frames from a first buffer, it begins rendering the beginning video frames from a second buffer. In this way, the beginning of a next video cycle is already rendered for viewing by the time a current video cycle is ending.

Abstract: The present disclosure provides an optical circulator. The optical circulator includes a first integrated module, a second integrated module and a third integrated module which are sequentially connected from front to rear. The first integrated module includes a mating shell, an optical fiber ferrule received in the mating shell and a first birefringence crystal attached to a rear surface of the optical fiber ferrule; the second integrated module comprises a first tube fixed behind the mating shell, a magnetic ring received in the first tube, a Wollaston prism fixed in the magnetic ring, two Faraday rotators respectively provided to both sides of the Wollaston prism, and two collimating lenses respectively provided to both sides of the two Faraday rotators. The third integrated module includes a second tube fixed behind the first tube, a dual fiber pigtail received in the second tube, and a second birefringence crystal attached to a front surface of the dual fiber pigtail.

Abstract: The present disclosure provides an optical fiber ferrule adapter. The optical fiber ferrule adapter comprises a first ceramic ferrule, an output optical fiber assembly, and a first collimating lens, a second collimating lens, a half wave plate, a Faraday rotator, a first birefringence member and a second birefringence member which are provided between the first ceramic ferrule and the output optical fiber assembly. The first birefringence member is adjacent to the first ceramic ferrule, the second birefringence member is adjacent to the output optical fiber assembly; the first collimating lens, the second collimating lens, the Faraday rotator and the half wave plate are arranged between the first birefringence member and the second birefringence member; the Faraday rotator is positioned between the first collimating lens and the second collimating lens. The optical fiber ferrule adapter can isolate a reverse light and have a smaller structural dimension, which meets the trend of miniaturization.

Abstract: Techniques of playing back a looping video file involve providing multiple video codecs for decoding a video file. Each video codec performs its own decoding operation on the looping video file, resulting in multiple buffers of video frames and a buffer of audio frames. Then, as the GPU renders the ending video frames from a first buffer, it begins rendering the beginning video frames from a second buffer. In this way, the beginning of a next video cycle is already rendered for viewing by the time a current video cycle is ending.

Abstract: Techniques of playing back a looping video file involve providing multiple video codecs for decoding a video file. Each video codec performs its own decoding operation on the looping video file, resulting in multiple buffers of video frames and a buffer of audio frames. Then, as the GPU renders the ending video frames from a first buffer, it begins rendering the beginning video frames from a second buffer. In this way, the beginning of a next video cycle is already rendered for viewing by the time a current video cycle is ending.

Abstract: Techniques of playing back a looping video file involve providing multiple video codecs for decoding a video file. Each video codec performs its own decoding operation on the looping video file, resulting in multiple buffers of video frames and a buffer of audio frames. Then, as the GPU renders the ending video frames from a first buffer, it begins rendering the beginning video frames from a second buffer. In this way, the beginning of a next video cycle is already rendered for viewing by the time a current video cycle is ending.