• Laser & Optoelectronics Progress
  • Vol. 60, Issue 13, 1314001 (2023)
Aoyang Wang1、*, Xiangsheng Yu2、**, and Guang Yuan1、***
Author Affiliations
  • 1Department of Physical and Optoelectronic Engineering, Faculty of Information Science and Engineering, Ocean University of China, Qingdao 266100, Shandong, China
  • 2Qingdao Leichuang Optoelectronic Technology Co., Ltd., Qingdao 266107, Shandong, China
  • show less
    DOI: 10.3788/LOP223317 Cite this Article Set citation alerts
    Aoyang Wang, Xiangsheng Yu, Guang Yuan. Self-Frequency Doubling Yellow Laser with Low Thermal Effect and High Beam Quality[J]. Laser & Optoelectronics Progress, 2023, 60(13): 1314001 Copy Citation Text show less

    Abstract

    The development of self-frequency doubling lasers has been significantly limited owing to the thermal effect. To reduce the thermal effect of lasers and obtain higher beam quality yellow laser output, a Yb∶YCOB self-frequency doubling crystal yellow laser pumped by a 1020-nm laser is proposed. The influence of the thermal lens effect, because of the self-frequency doubling crystal-absorbing pump light energy, on the phase matching condition during the process of optical frequency doubling is explained on the basis of a theoretical analysis. Furthermore, the analysis also yields an explanation for the improvement in the quality of the 1020-nm single-band pumping mode beam, as compared with that of the traditional 976-nm laser diode pumping mode. A 570-nm yellow laser with higher beam quality is obtained through experiments. The beam quality factors correspond to Mx2=1.41 and My2=1.87. The results indicate that the quality of the outgoing beam at a wavelength of 1020 nm is significantly higher than that at 976 nm, and the spectrum width is narrower. The results of the study play a guiding role in reducing the thermal effect of Yb∶YCOB self-frequency doubling lasers and obtaining high-power yellow lasers with higher beam quality and narrower spectrum width.
    κ=16α=x,y0l1ωα2z+ωα,e2zdzα0l1ωα2zdz0l1ωα,e2zdz2
    ωα2z=ωα021+z-z0zα02
    zα0=πωα02/λ
    ωα,e2(z)=ωα,e021+zzα,e02
    zα,e0=πωα,e02λ
    Aoyang Wang, Xiangsheng Yu, Guang Yuan. Self-Frequency Doubling Yellow Laser with Low Thermal Effect and High Beam Quality[J]. Laser & Optoelectronics Progress, 2023, 60(13): 1314001
    Download Citation