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Ultra-long-distance double-fiber interconnected multistage optical fiber time frequency transmission system

A technology of time-frequency transmission and time-frequency, which is applied in the direction of optical fiber transmission, etc., can solve problems such as system signal interruption, poor system reliability, and waste of optical fiber resources, and achieve good stability, high system reliability, and high output accuracy.

Active Publication Date: 2020-05-05
NAT INST OF METROLOGY CHINA
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AI Technical Summary

Problems solved by technology

[0002] The current transmission of ultra-long-distance time and frequency mostly uses optical fiber transmission. The transmission of the time signal and the transmission of the frequency signal are carried out separately. The transmission of the second pulse synchronously occupies one channel; the transmission of the frequency signal occupies two channels, and one channel is used for transmission. The sine wave signal from the local end to the remote end, and another channel is used to transmit the sine wave signal from the remote end to the local end to eliminate the influence of line delay changes. The transmission of the entire time and frequency uses 3 optical fiber channels, resulting in optical fiber waste of resources
[0003] In particular, during the transmission of time and frequency, once an abnormality occurs in a device or optical fiber, it will cause signal interruption in the entire system, and the system reliability is poor

Method used

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  • Ultra-long-distance double-fiber interconnected multistage optical fiber time frequency transmission system
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Embodiment Construction

[0033] The features and advantages of the present invention will become clearer and clearer along with these exemplary descriptions through the detailed description of the present invention below.

[0034] The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as superior or better than other embodiments. While various aspects of the embodiments are shown in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

[0035] On the one hand, the present invention provides a multi-level optical fiber time-frequency transmission system for ultra-long-distance dual-fiber interconnection, such as figure 1 shown, with one or more transfer units,

[0036] The transmission unit includes multiple optical fiber single-channel time-frequency high-precision transmission devices, multiple time-frequency signal synthesis de...

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Abstract

The invention provides an ultra-long-distance double-fiber interconnected multistage optical fiber time frequency transmission system. The device is provided with one or more transmission units, the transmission unit comprises a plurality of optical fiber single-channel time frequency high-precision transmission devices, a plurality of time frequency signal comprehensive devices based on multi-source time frequency signal fusion and optical fibers connected with the devices. The system performs cross transmission in different links of time-frequency signal transmission by increasing the configuration number of devices, so that the time-frequency transmission system operates stably.

Description

technical field [0001] The invention relates to a time-frequency transmission system, in particular to an ultra-long-distance multi-stage optical fiber time-frequency transmission system, which belongs to the field of time-frequency technology. Background technique [0002] The current transmission of ultra-long-distance time and frequency mostly uses optical fiber transmission. The transmission of the time signal and the transmission of the frequency signal are carried out separately. The transmission of the second pulse synchronously occupies one channel; the transmission of the frequency signal occupies two channels, and one channel is used for transmission. The sine wave signal from the local end to the remote end, and another channel is used to transmit the sine wave signal from the remote end to the local end to eliminate the influence of line delay changes. The transmission of the entire time and frequency uses 3 optical fiber channels, resulting in optical fiber Wast...

Claims

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Application Information

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IPC IPC(8): H04B10/25
CPCH04B10/25
Inventor 林平卫宋振飞屈继峰
Owner NAT INST OF METROLOGY CHINA
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