We measured the thermally induced lens from the coefficient of defocus aberration using a Shack-Hartmann wavefront sensor (SHWFS). As a calibration technique, we infer the focal length of standard lenses probed by a collimated Gaussian beam of wavelength 633 nm. The technique was applied to an Nd:YAG crystal that is actively pumped by a diode laser operating at 808 nm.
Reference:
Bell, T., Forbes, A., Ngcobo, S. et al. Thermal lensing measurement from the coefficient of defocus aberration. SPIE Photonics West, San Francisco, CA, USA, March 2016
Bell, T., Forbes, A., Ngcobo, S., & Naidoo, D. (2016). Thermal lensing measurement from the coefficient of defocus aberration. http://hdl.handle.net/10204/9317
Bell, Teboho, A Forbes, Sandile Ngcobo, and Darryl Naidoo. "Thermal lensing measurement from the coefficient of defocus aberration." (2016): http://hdl.handle.net/10204/9317
Bell T, Forbes A, Ngcobo S, Naidoo D, Thermal lensing measurement from the coefficient of defocus aberration; 2016. http://hdl.handle.net/10204/9317 .
