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Bidirectional wave division multiplexing optical amplification device

An amplification device and wavelength division multiplexing technology, which is applied in the field of bidirectional wavelength division multiplexing optical amplification devices, can solve the problems of incompatibility, increased system cost, low efficiency, etc., and achieve the effect of achieving compatibility

Active Publication Date: 2019-04-19
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This solution needs to insert an isolator for each wavelength channel, which increases the cost of the system, and the amplifier needs to be customized, which is not compatible with the unidirectional optical amplifier in the existing communication network
The Czech education and research network CESNET and others use distributed Raman amplifiers [5, V.Smotlacha and J.Vojtěch, "Time and frequency transfer using amplified optical links," in European Frequency and Time Forum, (2015), 325.] for two-way The transmitted time-frequency signal is optically amplified. Although a single fiber can guarantee the bidirectional symmetry of the link transmission delay, the noise such as Rayleigh scattering will also be amplified multiple times. Polarization sensitivity and other issues

Method used

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  • Bidirectional wave division multiplexing optical amplification device

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Embodiment 1

[0029] Embodiment 1: Bidirectional wavelength division multiplexing optical amplification device for optical fiber time transfer or frequency transfer

[0030] figure 1 It is a structural schematic diagram of Embodiment 1 of the bidirectional wavelength division multiplexing optical amplification device of the present invention. figure 1 (a) is a schematic diagram of the optical amplification process from A to B, figure 1 (b) Schematic diagram of the optical amplification process from B to A. As can be seen from the figure, embodiment 1 of the bidirectional wavelength division multiplexing optical amplification device used for optical fiber time or frequency transmission according to the present invention comprises: a first division / combiner 1, a multiplexer 2, a unidirectional Optical amplifier 5, wave splitter 3 and second wave splitter / multiplexer 4;

[0031] The multiplexing end 1-COM of the first splitter / combiner 1 is connected to the A-end optical fiber link, and the...

Embodiment 2

[0039] Embodiment 2: A bidirectional wavelength division multiplexing optical amplification device for optical fiber time transfer and having a unidirectional service transmission channel

[0040] figure 2 It is a structural schematic diagram of Embodiment 2 of the bidirectional wavelength division multiplexing optical amplification device of the present invention, figure 2 (a) is a schematic diagram of the forward optical signal amplification process, figure 2 (b) Schematic diagram of the backward optical signal amplification process. As can be seen from the figure, the composition of the bidirectional wavelength division multiplexing optical amplifying device of the present embodiment includes sequentially along the forward direction: the first splitter / combiner 1, the multiplexer 2, the one-way optical amplifier 5, the splitter 3 and the first Divider / combiner 4;

[0041] The A-end optical fiber link is connected to the multiplexer 1-COM of the first multiplexer / multi...

Embodiment 3

[0046] Embodiment 3: A bidirectional wavelength division multiplexing optical amplification device for joint transmission of optical fiber time and frequency and having five unidirectional service transmission channels

[0047] image 3 It is a structural schematic diagram of Embodiment 3 of the bidirectional wavelength division multiplexing optical amplification device of the present invention, image 3 (a) is a schematic diagram of the forward optical signal amplification process, image 3 (b) Schematic diagram of the backward optical signal amplification process. As can be seen from the figure, the composition of the bidirectional wavelength division multiplexing optical amplifying device of the present embodiment includes sequentially along the forward direction: the first splitter / combiner 1, the multiplexer 2, the one-way optical amplifier 5, the splitter 3 and the first Two dividers / combiners 4; the multiplexer 1-COM of the first divider / combiner 1 is connected to the...

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Abstract

The invention relates to a bidirectional wave division multiplexing optical amplification device for fiber time frequency transmission. Forwardly, the device sequentially comprises a first wave separator / a first wave combiner, a wave combiner, a one-way optical amplifier, a wave separator, and a second wave separator / a second wave combiner. A time / frequency transmission channel is separated from afiber wavelength channel by the wave separator / wave combiner, so that forward and backward transmission channels on the time / frequency transmission channel enter the one-way optical amplifier containing an optical isolator together with other one-way business transmission channels, an optical signal with time / frequency in a bidirectional wave division multiplexing time frequency transmission chain is amplified in two ways by identical fiber but different waves, and impact of amplification for multiple times of Rayleigh scattering and other noises on fiber time frequency transmission performance is prevented effectively. Further, amplification of other one-way business transmission channels in the fiber is not affected, and is compatible with one-way optical amplification in a fiber communication network.

Description

technical field [0001] The invention relates to optical fiber time-frequency transmission, in particular to a bidirectional wavelength division multiplexing optical amplification device for optical fiber time-frequency transmission. Background technique [0002] High-precision time-frequency references play an important supporting role in the fields of satellite navigation, precision surveying, geological surveying and mapping, telemedicine and deep space exploration. At present, satellite-based time-frequency transfer technologies, such as GPS Common View (CV) and Satellite Two-way Time-Frequency Comparison (TWSTFT), due to the interference of environmental factors on free space transmission links, the accuracy of time transfer can only reach ns order of magnitude, the stability of frequency transmission can only reach 10 -15 / day. With the continuous development of new technologies, clock sources with higher stability and uncertainty such as optical clocks have been inve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/297H04J14/02
CPCH04B10/2971H04J14/0216
Inventor 吴龟灵丁旋刘莹左发兴陈建平
Owner SHANGHAI JIAO TONG UNIV
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