Yunpei  Deng, Schwarz, Alexander , Fattahi, Hanieh , Ueffing, Moritz , Gu, Xun , Ossiander, Marcus , Metzger, Thomas , Pervak, Volodymyr , Ishizuki, Hideki , Taira, Takunori , Kobayashi, Takayoshi , Marcus, Gilad , Krausz, Ferenc , Kienberger, Reinhard , and Karpowicz, Nicholas . 2012. ?Carrier-Envelope-Phase-Stable, 1.2Mj, 1.5 Cycle Laser Pulses At 2.1?m?. http://ol.osa.org/abstract.cfm?URI=ol-37-23-4973.