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arXiv · 1712.07327

2.6mJ/100Hz CEP stable near-single-cycle 4{\mu}m laser based on OPCPA and hollow-core-fiber compression

Pengfei Wang·Yanyan Li·Wenkai Li·Hongpeng Su·Beijie Shao·Shuai Li·Wang Cheng·Ding Wang·Ruirui Zhao·Yujie Peng·Yuxin Leng·Ruxin Li·Zhizhan Xu
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Abstract

A carrier envelope phase stable near-single cycle mid-infrared laser based on optical parametric chirped pulse amplification and hollow-core-fiber compression is demonstrated. 4 {\mu}m laser pulses with 11.8 mJ energy are delivered from a KTA based OPCPA with 100 Hz repetition rate, and compressed to be ~105 fs by a two-grating compressor with efficiency over 50%. Subsequently, the pulse spectrum is broadened by employing a krypton gas-filled hollow-core-fiber (HCF). Then, the pulse duration is further compressed to 21.5 fs through a CaF2 bulk material with energy of 2.6 mJ and stability of 0.9% RMS, which is about 1.6 cycle for 4 {\mu}m laser pulse. The near-single cycle 4 {\mu}m laser pulse CEP is passively stabilized with ~370 mrad based on a CEP stable 4 {\mu}m OPA injection.

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Pengfei Wang, Yanyan Li, Wenkai Li, Hongpeng Su, Beijie Shao, Shuai Li, Wang Cheng, Ding Wang, Ruirui Zhao, Yujie Peng, Yuxin Leng, Ruxin Li, Zhizhan Xu. 2017-12-20. 2.6mJ/100Hz CEP stable near-single-cycle 4{\mu}m laser based on OPCPA and hollow-core-fiber compression. https://doi.org/10.1364/ol.43.002197

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