Bell, TebohoNaidoo, DarrylForbes, Andrew2017-06-072017-06-072014-07Bell, T., Naidoo, D. and Forbes, A. 2014. Thermally induced lensing determination from the coefficient of defocus aberration. 59th Conference of the South African Institute of Physics, University of Johannesburg, 7 to 11 July 2014http://events.saip.org.za/contributionDisplay.py?contribId=270&sessionId=11&confId=34http://hdl.handle.net/10204/912559th Conference of the South African Institute of Physics, University of Johannesburg, 7 to 11 July 2014The effects of a temperature gradient in a laser crystal in an end-pumped configuration in a solid-state laser resonator results in thermally induced aberrations. Of particular interest we measure the thermally induced lens from the coefficient of defocus aberration with a Shack- Hartmann wavefront sensor. As a calibration technique, we infer the focal length of standard lenses probed by a collimated Gaussian beam at 633 nm and this technique is applied to an Nd:YAG medium under active pumping. This result is compared to a typical thermal lens determination where the length of an unstable cavity is varied.enLaser crystalSolid-state laser resonatorConference PresentationBell, T., Naidoo, D., & Forbes, A. (2014). Thermally induced lensing determination from the coefficient of defocus aberration. http://hdl.handle.net/10204/9125Bell, Teboho, Darryl Naidoo, and Andrew Forbes. "Thermally induced lensing determination from the coefficient of defocus aberration." (2014): http://hdl.handle.net/10204/9125Bell T, Naidoo D, Forbes A, Thermally induced lensing determination from the coefficient of defocus aberration; 2014. http://hdl.handle.net/10204/9125 .TY - Conference Presentation AU - Bell, Teboho AU - Naidoo, Darryl AU - Forbes, Andrew AB - The effects of a temperature gradient in a laser crystal in an end-pumped configuration in a solid-state laser resonator results in thermally induced aberrations. Of particular interest we measure the thermally induced lens from the coefficient of defocus aberration with a Shack- Hartmann wavefront sensor. As a calibration technique, we infer the focal length of standard lenses probed by a collimated Gaussian beam at 633 nm and this technique is applied to an Nd:YAG medium under active pumping. This result is compared to a typical thermal lens determination where the length of an unstable cavity is varied. DA - 2014-07 DB - ResearchSpace DP - CSIR KW - Laser crystal KW - Solid-state laser resonator LK - https://researchspace.csir.co.za PY - 2014 T1 - Thermally induced lensing determination from the coefficient of defocus aberration TI - Thermally induced lensing determination from the coefficient of defocus aberration UR - http://hdl.handle.net/10204/9125 ER -