Laser developer Onefive GmbH and the laser group of the European X-Ray Free Electron Laser (XFEL) GmbH research facility have joined to develop and commission an all-fiber front-end for a laser system within the facility. The air-cooled Origami - 10 XP Dual Burst laser featuring the dual output for simultaneous seeding and pumping of a non-collinear optical parametric amplifier installed at the European XFEL. Courtesy of Onefive GmbH. The European XFEL is developing high-power burst mode femtosecond pump-probe lasers to be used for experiments in combination with the facility’s x-ray beams. The ultrashort, high-intensity x-ray laser pulses available at the facility will enable studies of ultrafast processes in solids, gas-phase, chemical and biomolecular structures, and extreme states of matter down to the atomic level. Its pump-probe lasers will typically activate samples, followed by probing with the x-ray pulses. The laser sources rely on very high-power and high-energy sub-picosecond pulses at 1-μm wavelength, arranged in low-duty cycle burst patterns. The Origami-10 XP Dual Burst fiber-based front-end laser system is at the core of the European XFEL pump-probe laser. The system has been customized by Onefive to the unique requirements of the pump-probe laser and is seeded with a 1-μm, ultra-low noise femtosecond laser with consecutive pulse picking and amplification. Onefive is a developer of OEM ultrafast lasers for medical, biological, environmental, security, sensing, material processing and R&D applications.