PROBLEM TO BE SOLVED: To provide an optical pulse train synchronizer with which it is possible to synchronize two optical pulses more stably than in the past.;SOLUTION: The optical pulse train synchronizer comprises: a first light source 1 for outputting a first optical pulse train 101 having a first wavelength; a second light source 2 for outputting a second optical pulse train 102 having a second wavelength; wavelength change means 3 for changing the wavelength of the first optical pulse train to a third wavelength; first separation means 5 for separating the optical pulse train from the wavelength change means into a third optical pulse train 103 having the first wavelength and a fourth optical pulse train 104 having the third wavelength; second separation means 4 for separating the second optical pulse train into a fifth optical pulse train 105 having the second wavelength and a sixth optical pulse train 106 having the second wavelength; detection means 9 for detecting the third optical pulse train and the fifth optical pulse train; and period change means 11 for changing the pulse period of the first optical pulse train or the pulse period of the second optical pulse train on the basis of the detection result of the detection means.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2017,JPO&INPIT
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