Low threshold Raman effect in high power narrowband fiber amplif...A low-threshold Raman effect in a kilowatt ytterbium-doped narrowband fiber amplifier system is reported. The Raman Stokes ... power of only ～400 W, indicating that the Raman threshold of this kilowatt codirectional pumped continuous wave fiber amplifier is ...
Threshold gain behavior of lasing modes in two-dimensional activ... ... that these modes have a typical threshold gain behavior and different threshold pumping rates. There exists a certain correspondence between the mode's threshold pumping rate and its lifetime, and the longer the lifetime is, the lower the threshold is.
Low threshold high stability passively mode-locked laser perform... ... is experimentally investigated both using Z-type and W-type cavities with a semiconductor saturable absorbed mirror. The continuous-wave mode-locked threshold of the absorbed pump power is just 1.8 W. The maximum average output power is 210 mW, which is ...
High damage threshold liquid crystal binary mask for laser beam ...In order to improve the damage threshold and enlarge the aperture of a laser beam shaper, photolithographic patterning technology is adopted to design a new type of liquid crystal binary mask. The inherent conductive metal layer of commercial liquid ...
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