| 摘要 |
A fast tunable optical delay line is disclosed having a plurality of fiber gratings connected via a circulator. The gratings may be Fiber Bragg Gratings and may be inverse from one another. In operation, an optical signal is directed to a first grating, reflected and then received from a second grating reflected and outputted. At least one of the grating is temperature tunable so as to cause a desired delay or acceleration in the reflected signal. The present invention may be employed for synchronization if two optical signals.
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