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Analysis of a highly efficient phase-locking stabilization method for electro-optic comb generation

Posted on 2020-05-21 - 21:33
We theoretically show that a slightly modified Pound-Drever-Hall (PDH) stabilization scheme can lead to the optimum time domain characteristics for electro-optic comb generators (EOCG). The ideal locking point is located by analyzing the EOCG output pulse width. By summing up the electrical field reflected by the EOCG front mirror, a model of the phase-locking error signal is derived with the Jacobi–Anger identical transformation. The simulation and experiment show that the zero-locking point of the error signal of the modified scheme coincides well with the ideal locking point in contrast to the direct application of the PDH scheme. Finally, a power efficiency of up to 2.9% is achieved with this EOCG stabilization scheme. A relative instability of better than 2.6 × 10-8 is demonstrated by a dual comb interferometer with fixed paths. The Allan deviation of the comb mode frequencies are smaller than 2.8 × 10-9 and 1.1 × 10-10 for average times of 1 s and 100 s, respectively.

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Applied Optics

AUTHORS (7)

Ruitao Yang
Florian Pollinger
Peng-Cheng Hu
Hongxing Yang
Haijin Fu
Fan Zhigang
Jiubin Tan
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