Device and method for measuring optical Brillouin gain spectrum by aid of rectangular spectrum probe light
A technology of Brillouin gain spectrum and optical fiber measurement, which is applied in the fields of interference spectroscopy and spectrum investigation, which can solve the problems of unfavorable long-distance measurement and achieve the effect of shortening the measurement time
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specific Embodiment approach 1
[0021] Specific implementation mode 1: the following combination figure 1 with figure 2 To explain this embodiment, the device for measuring the gain spectrum of fiber Brillouin using rectangular spectrum probe light in this embodiment includes a fiber laser 1, and it also includes a first fiber splitter 2, a second fiber splitter 3, The first polarization controller 4, the fiber circulator 5, the fiber to be tested 6, the second polarization controller 7, the heterodyne measuring instrument 8, the rectangular spectrum detection light source 9, and the fiber isolator 10,
[0022] The laser light output by the fiber laser 1 is divided into two beams by the first fiber splitter 2, the first beam is incident on the second fiber splitter 3, and the second beam is incident on the input port of the rectangular spectrum detection light source 9.
[0023] The laser light emitted from the first output port of the second fiber splitter 3 enters the first port of the fiber circulator 5 throug...
specific Embodiment approach 2
[0026] Specific implementation manner 2: the following combination figure 2 This embodiment will be described. This embodiment will further explain the first embodiment. The heterodyne measuring instrument 8 in this embodiment is composed of an optical fiber combiner 8-1, a photodetector 8-2 and a spectrum analyzer 8-3.
[0027] The first laser input port of the heterodyne measuring instrument 8 is the first laser input port of the optical fiber combiner 8-1, and the second laser input port of the heterodyne measuring instrument 8 is the second laser input of the optical fiber combiner 8-1 Port, the optical signal output end of the fiber optic combiner 8-1 is connected to the optical signal input end of the photodetector 8-2, and the electrical signal output end of the photodetector 8-2 is connected to the electrical signal input end of the spectrum analyzer 8-3 .
[0028] In this embodiment, except for the circuit connection between the photodetector 8-2 and the spectrum analyzer...
specific Embodiment approach 3
[0029] Specific implementation manner three: the following combination figure 2 This embodiment will be described. This embodiment will further explain the first or second embodiment. The rectangular-spectrum detection light source 9 in this embodiment is the third polarization controller 9-1, the first intensity modulator 9-2, and the microwave generator 9 -3. It is composed of fiber grating filter 9-4, fiber amplifier 9-5, second intensity modulator 9-6 and arbitrary waveform signal generator 9-7,
[0030] The input port of the rectangular spectrum detection light source 9 is the input port of the third polarization controller 9-1. The optical signal output end of the third polarization controller 9-1 is connected to the optical signal input end of the first intensity modulator 9-2. The electrical signal input end of an intensity modulator 9-2 is connected to the electrical signal output end of the microwave generator 9-3, and the optical signal output end of the first intensit...
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