Hongxiang Chang, Kaikai Jin, Yuqiu Zhang, Jiayi Zhang, Kun Jin, Can Li, Rongtao Su, Jinyong Leng, Pu Zhou. Research on Optical Path and Phase Simultaneous Control in Coherent Beam Combining of Broadband Laser Based on Spectral Filtering[J]. Acta Optica Sinica, 2023, 43(17): 1714008
- Acta Optica Sinica
- Vol. 43, Issue 17, 1714008 (2023)
Fig. 1. System schematic diagram
Fig. 2. Relationship between optical path difference and interference light intensity
Fig. 3. Relationship between interference light intensity and phase difference of the output of BPF 1, BPF 2, and total laser. (a) Optical path difference of -50 μm; (b) optical path difference of 0; (c) optical path difference of 50 μm
Fig. 4. Flowchart of phase and optical path control
Fig. 5. Numerical simulation results of phase and optical path control. (a) Light intensity variation of phase control; (b) light intensity variation of optical path control; (c) total light intensity variation
Fig. 6. Spectral response of the bandpass filters. (a) (1066±1) nm; (b) (1061±1) nm; (c) (1064±5) nm
Fig. 7. Initial optical path difference between two beams
Fig. 8. Interference light intensity variation curves. (a) 1066 nm interference light intensity variation curve; (b) 1061 nm interference light intensity variation curve; (c) total light intensity variation curve
Fig. 9. Partial enlarged detail of total interference light intensity under simultaneous phase and optical path control and its spectral diagram. (a) Time domain diagram; (b) frequency domain diagram
Fig. 10. Openloop spectrogram of total interference light intensity
Fig. 11. Spectra under phase control only and simultaneous phase and optical path control
Fig. 12. Experimental results of implementing optical path control after manually changing optical path difference
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