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Summary form only given. We examine the connection between wavelength and spatial mode that occurs in Kerr-lens mode-locking (KLM) lasers because self-phase modulation and self-focusing have the same underlying origin. We demonstrate that a laser generating 10-fs pulses exhibits a strong wavelength dependence in its output beam; that is it has a frequency-dependent mode size (FDMS). The measurements...
Summary form only given. In the present paper, we discuss scaling to high output powers without using higher pump powers. This is particularly important for the gain media in the fluoride material system that exhibit low thermal conductivity, and even more so for gain media that exhibit nonradiative processes that decrease power rapidly as temperature rises, such as Cr:LiSrAlF/sub 6/. The recent arrival...
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