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Updated: Jan 22, 2026

Construction and Characterization of External Cavity Diode Lasers for Atomic Physics
Published on: April 24, 2014
Optical-frequency scanning-rate calibration of external cavity diode lasers using adaptive complex-shifted Morlet
Zhiyong Wang1, Zhigang Liu1, Wen Deng1
1Key Laboratory of Education Ministry for Modern Design and Rotor-Bearing System, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, People's Republic of China.
Abstract:
Real-time measurement of the optical frequency of an external cavity diode laser (ECDL) is very difficult. In this study, a novel adaptive complex-shifted Morlet wavelets method was proposed to accurately determine the instantaneous frequency of the interference signal. The optical frequency scanning rate and the change in the optical frequency trend could then be obtained using the instantaneous frequency. The proposed method was theoretically analyzed, and both simulations and experimental results confirm that the method can accurately obtain the scanning rate and change in the trend of the ECDL optical frequency. The experimental results demonstrate that the maximum single-cycle relative error was less than 2.5‰ and the linearity of output optical frequency with correction was good and R2 was 0.999 98.
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