Optical fiber insertion loss detection method and device
A detection method and optical fiber technology, applied in the field of communication, can solve the problems of inability to accurately reflect the optical fiber insertion loss, low optical signal power, etc.
Active Publication Date: 2016-07-13
HISILICON OPTOELECTRONICS CO LIMITED
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However, this prior art cannot accurately reflect the optical fiber insertion loss of a DWDM system comprising a distributed inverse Raman amplifier (that is, the OA30 is connected to an optical fiber through a distributed Raman amplifier), especially when the system wave number is small and the power of the optical signal is low. especially noticeable at low
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[0050] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0051] image 3 It is a block diagram of a DWDM system including distributed inverse Raman amplifiers. Such as image 3 As shown, the DWDM system includes a distributed reverse Raman amplifier 50, the input end of the distributed reverse Raman amplifier 50 is connected to the input end of the first optical amplifier 40 through an optical fi...
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The embodiments of the invention provide an optical fiber insertion loss detection method and device which are applicable to a DWDM (dense wavelength division multiplexing) system comprising a distributed backward Raman amplifier. The input end of the distributed backward Raman amplifier is connected with the output end of a first optical fiber amplifier through an optical fiber; and the output end of the distributed backward Raman amplifier is connected with the input end of a second optical amplifier. The method includes the following steps that: ASE noises generated by the distributed backward Raman amplifier in the optical fiber are acquired; and optical fiber insertion loss is determined according to the gain and ASE noises of the distributed backward Raman amplifier, first signal power of the output end of the first optical amplifier, and second signal power of the input end of the second optical amplifier. According to the method and device provided by the embodiments of the invention, based on optical fiber insertion loss detection in the prior art, the influence of the ASE noises is considered when the optical fiber insertion loss is calculated, and accurate detection of the optical fiber insertion loss in the DWDM (dense wavelength division multiplexing) system comprising the distributed backward Raman amplifier can be realized.
Description
technical field [0001] Embodiments of the present invention relate to communication technologies, and in particular to a method and device for detecting optical fiber insertion loss. Background technique [0002] In a dense wavelength division multiplexing (DWDM for short) system, the power of the optical signal will gradually decrease when it passes through the transmission fiber. An amplifier (Erbium-Doped Fiber Amplifier, EDFA for short) or a Raman amplifier amplifies the optical signal. When the number of channels changes, in order to ensure the normal service of the remaining channels, the system must require the optical power of the remaining channels to remain unchanged, so the optical amplifier must work in the gain-locked mode. [0003] The transmission optical fiber will gradually age over time, and the insertion loss of the optical fiber link will gradually increase accordingly. Since the optical amplifier works in a gain-locked mode, the degradation of the opti...
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Inventor 肖孟本董红超何竹松
Owner HISILICON OPTOELECTRONICS CO LIMITED