Research on the propagation of laser beams array with coherent and incoherent combination in dynamic atmosphere turbulence

• Autorzy: Deng Wantao , Wang Chengcheng , Gan Chunquan , Xue Liangping , Xia Huijun , Wang Peng , Yang Huan

Identyfikatory

DOI

10.37190/oa220207

• Języki publikacji: EN

Abstrakty

EN

High-power laser systems mostly use coherent or incoherent combined beams to achieve higher laser output power to satisfy the application. However, the far-field beam quality of laser will be reduced when propagating over atmosphere. Based on the propagation model of laser beams array, we use atmospheric coherence length, laser duration and average wind velocity to construct dynamic atmospheric turbulence which is characterized as a phase screen sequence. Meanwhile, considered as the indexes to evaluate beam quality, peak intensity and intensity in bucket are comparatively analysed in coherent and incoherent combined beams in far-field. The results indicate that in weaker turbulence circumstances, coherent combined beam has an advantage compared with the incoherent combined beams when laser duration is short, and coherent combination is more suitable for pulsed laser. With laser duration is increasing, the beam quality of incoherent and coherent combined beams both decrease and tend to be close. In stronger turbulence circumstances, the corresponding laser duration will be shorter when the beam quality of coherent combined beams is extraordinary close to that of incoherent combined beams. The researches can provide important data for high-power laser system to select the optimal beam combination mode to improve its performance.

Słowa kluczowe

EN

laser propagation; dynamic atmospheric turbulence; coherent combination; incoherent combination; beam quality

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Optica Applicata
• Rocznik: 2022
• Tom: Vol. 52, nr 2
• Strony: 243--257
• Opis fizyczny: Bibliogr. 36 poz., rys., tab.

Twórcy

autor

Deng Wantao

• School of Optics and Photonics, Beijing Institute of Technology, Beijing 100081, China
• Southwest Institute of Technical Physics, Chengdu 610041, China

autor

Wang Chengcheng

• Southwest Institute of Technical Physics, Chengdu 610041, China

autor

Gan Chunquan

• Southwest Institute of Technical Physics, Chengdu 610041, China

autor

Xue Liangping

• Southwest Institute of Technical Physics, Chengdu 610041, China

autor

Xia Huijun

• Southwest Institute of Technical Physics, Chengdu 610041, China

autor

Wang Peng

• Southwest Institute of Technical Physics, Chengdu 610041, China

autor

Yang Huan

• Southwest Institute of Technical Physics, Chengdu 610041, China

Bibliografia

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