Method and device for measuring optical fiber attenuation value
A measurement method and measurement device technology, which is applied in the field of quantum communication, can solve problems such as troublesome operation and maintenance, great influence of optical components of quantum communication equipment, and inability to perform long-term monitoring
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Embodiment 1
[0029] refer to figure 2 as shown in figure 2 A method for measuring fiber attenuation value provided by the embodiment of this application, the method can be applied to such as figure 1 In the quantum communication system described in, the quantum communication system may include a sending end 100 and a receiving end 200, wherein the sending end 100 and the receiving end 200 are connected by an optical fiber 300, and the method may include S101-S103:
[0030] S101. Acquire a first code rate and a second code rate.
[0031] Wherein, the first bit rate is the photon count rate received by the receiving end 200 when the sending end 100 sends an optical signal through the optical fiber 300; the second bit rate is the photon counting rate received by the receiving end 200 when the sending end 100 stops sending the optical signal rate, the first code rate is greater than the second code rate.
[0032] Specifically, when the quantum communication system is working, the optical ...
Embodiment 2
[0051] refer to Figure 4 As shown in , the embodiment of the present application provides a measurement device for optical fiber attenuation value, which is applied to such as figure 1 As shown in the quantum communication device, the device 400 may include:
[0052] The acquisition unit 410 is configured to acquire a first code rate and a second code rate, wherein the first code rate is the photon count rate received by the receiving end when the transmitting end sends an optical signal through the optical fiber; the second code rate When the sending end stops sending optical signals, the photon count rate received by the receiving end, the first code rate is greater than the second code rate;
[0053] The acquiring unit 410 is also configured to acquire the frequency of the optical signal sent by the transmitting end, and acquire the loss parameter of the receiving end;
[0054] The calculation unit is used to calculate the attenuation value of the optical fiber according...
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