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Study the Optical Distortions Generated Inside the Nd:YAG Laser Rod Affected by Thermal Lensing | ||
| Al-Mustansiriyah Journal of Science | ||
| Article 1, Volume 21, Issue 1, 2010, Pages 97-104 | ||
| Author | ||
| Ali J. Mohammad | ||
| Abstract | ||
| The aim of this article is to study the optical distortions generated inside the (Nd:YAG) laser rod produced the so-called “ thermal lens” , which is affected by temperature coefficient of the index of refraction dn/dT yields to stressed the material and deformed the end rod by longitudinal expansion . All these effects led to generate thermal lens inside the rode . These effects had been determined by using mathematical formulas to treat equations including the heat dissipated through the rod (Q) and the temperature difference between the center and the outer rod surface (ΔT) . Focal length (fTL ) and refractive index (∆n) changing for thermal lens had been determined by evaluating the dioptric lens power (D) and dn/dT . These parameters will be studied as a relation with the beam power (Pa) and the rod dimensions. | ||
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