Fig. 4
From: 4.8-μm CO-filled hollow-core silica fiber light source
Characteristics of the 2.33-μm fiber pump source. a Experimental setup of the Tm: ZBLAN fiber amplifier. The system employs an optical free space due to the absence of fiber components specifically engineered for 2.3 μm. FL focus lens. b Comparison of output spectra before and after DM3. c The measured spectrum of the pump system seeded by chosen absorption line wavelengths. d The F-P spectrum of the 2.33-μm laser output. e The 2.33-μm output power of Tm fiber laser versus incident pump power at 793 nm. Modifying the wavelength of the output does not result in significant alteration to the power of the 2.33-μm output
