4-channel Coherently Combined Long-term-stable Ultrafast Thulium-doped Fiber CPA

We present the first coherently combined, thulium-doped fiber CPA delivering >100 W average-power and simultaneously >1 GW of peak-power. Incorporating four amplifier channels the laser delivers pulses with >228 µJ energy and 48 hours – ideal prerequisites for next-generation industrial and scientific applications.