Soliton amplification to 2 MW peak power in a high power, Er fiber amplifier, pumped by a Raman fiber laser. I like this image as it shows a variety of optical phenomenon. Scatter from the 975 nm pump lasers, and 1 um Yb fiber laser in the background are picked up by the camera's silicon sensor. The typical blue and green upconversion from Yb and Er fibers is also visible. Finally, nonlinearity from the intense soliton generates a deep green, and then red light, at the amplifier output. [Honorable Mention 2015 After Image photo contest.]—Jeffrey W. Nicholson, OFS
29 Nov 2015