Fig. 5: Experimental test of BETDA targeting a range of 230 m using dual comb with random phase distribution. | Light: Science & Applications

Fig. 5: Experimental test of BETDA targeting a range of 230 m using dual comb with random phase distribution.

From: Brillouin expanded time-domain analysis based on dual optical frequency combs

Fig. 5: Experimental test of BETDA targeting a range of 230 m using dual comb with random phase distribution.

a Probe traces obtained with different Δν’s, each equal to the νB’s of two SMFs concatenated to compose a 230 m fiber under test (FUT). The inset illustrates the structure of the FUT. b 3D map of BGS constructed with 201 traces obtained by scanning Δν from 10.55 to 10.95 GHz

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