Optics and Photonics Society of Iran

Mendeley  

Zotero  

Fallah R, Nadgaran H. Investigation of influence of properties of the laser’s pump beam and laser crystal on the generation of thermally-affected Bessel-Gauss beam. ICOP & ICPET _ INPC _ ICOFS 2018; 24 :105-108
URL: http://opsi.ir/article-1-1630-en.html

The generation of Helmholtz–Gauss beam families such as Bessel–Gauss (BG) beam can be dramatically suffered from thermal-induced effects. İn this work, The output BG beams of a solid-state laser were assumed to pass through an ABCD optical system matrix. The analytical solutions show that the induced heat in the crystal depends on pump power, pump beam wasit, thermal conductivity and absorption coefficient of laser crystal. İn order to investigate the thermal effects, the intensity distributions of the BG beams against radial distance under various pump power, pump beam waist, absorption coefficient and thermal conductivity have been simulated. The results show that for high pump-power values and small values of pump waist, the thermal-induced effects are so dramatic and the beam intensity distribution profile is so altered that the identification of BG beams is not easily possible, but large pump waist and high thermal conductivity can eventually make the laser output similar to nonthermal case despite high pumping power is received. The results of this work are a valuable aid to experimenters for beam identification.