Abstract
Conference Title: 2019 Conference on Lasers and Electro-Optics (CLEO) Conference Start Date: 2019, May 5 Conference End Date: 2019, May 10 Conference Location: San Jose, CA, USA Using intense $3.6\ \mu \mathrm{m}$ , 200 fs, 500 Hz laser pulses, non-linear spectral broadening, filamentation and 2nd-9th harmonic generation in ZnS (Cleartran™) with 3–40 mm propagation distance were observed. Non-linear index of Cleartran was also measured. © 2019 The Author(s)