Phys.org October 1, 2021
Researchers in Germany have combined a fiber-laser system with multi-pass cells to create a laser with a combination of few-cycle pulses at high average power, pulse energy and repetition rate and with stable carrier envelope phase (CEP) operation. The system coherently combines eight amplifier channels. It emits 300-fs pulses that are then compressed down to the few-cycle regime using two multi-pass cells. The first multi-pass cell uses standard dielectric mirrors and the second cell uses metal-based mirrors. With further improvements, they hope to achieve less than 300 mrad of CEP noise. The laser system opens new prospects for secondary sources with unprecedented parameters, which in turn hold promise to advance the understanding of electronic processes on fundamental length- and timescales and contribute to new discoveries in biology, chemistry, physics, and medicine. Their paper will be presented at an upcoming Optica Laser Congress…read more.
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