6 February 2012 Real-time monitoring of thermal lensing of a multikilowatt fiber laser optical system
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Abstract
A laser beam waist analyzer system has been developed that permits the real time focal spot measurement of a high power fiber laser in excess of ten of kilowatts and the ability to monitor thermal lensing of a laser and its optical system. The analyzer can provide a laser's spatial profile, circularity, centroid, astigmatism and M-squared values inclusive of the optics used in the process application. The system is very compact, measures in real time with no moving parts by incorporating an all passive optical design to obtain spot diameter, M-squared, Rayleigh length, beam waist position at power levels in excess of 20 kW in less than one second from laser off to laser on.
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Michael Scaggs, Gil Haas, "Real-time monitoring of thermal lensing of a multikilowatt fiber laser optical system", Proc. SPIE 8236, Laser Resonators, Microresonators, and Beam Control XIV, 82360H (6 February 2012); doi: 10.1117/12.907508; https://doi.org/10.1117/12.907508
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