An all-fiber optical frequency shifter based on acousto-optic effect and its frequency shifting method
An all-fiber frequency shifter technology, which is applied in the field of optical information processing, can solve the problems that the all-fiber frequency shifter cannot be practically applied, can not be applied, and increases the cost of use, so as to facilitate application, facilitate packaging, and reduce insertion costs. damage effect
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[0030] The present invention will be further elaborated below through specific embodiments in conjunction with the accompanying drawings.
[0031]Such as figure 1 As shown, the all-fiber optical frequency shifter based on the acousto-optic effect of this embodiment includes: a sound-absorbing substrate 1, an ultrasonic transducer 2, a radio frequency signal generator 4, an ultrasonic pyramid 3 and a single-mode optical fiber 5; wherein, The outermost coating layer of the single-mode optical fiber 5 is removed, and only the core in the middle and the cladding surrounding the core are kept; by etching, the cladding of the single-mode optical fiber has two regions with thinner diameters, respectively It is the first acousto-optic action area and the second acousto-optic action area, the area where the diameter of the cladding is constant between the two is the interval area, and the area where the diameter of the cladding gradually changes at both ends of each section of the acou...
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