Interference between surface harmonics of carrier-envelope phase controlled few-cycle laser field

Hidetoshi Nakano; Atsushi Ishizawa; Katsuya Oguri

doi:10.1117/12.821427

18 February 2009 Interference between surface harmonics of carrier-envelope phase controlled few-cycle laser field

Hidetoshi Nakano, Atsushi Ishizawa, Katsuya Oguri

Proceedings Volume 7276, Photonics and Optoelectronics Meetings (POEM) 2008: Laser Technology and Applications; 72760D (2009) https://doi.org/10.1117/12.821427
Event: Photonics and Optoelectronics Meetings, 2008, Wuhan, China

Abstract

In this paper, we demonstrate an improved way of providing direct access to the carrier-envelope phase (CEP) in low-energy pulses (nearly 1 μJ) by using the interference between the second harmonic (SH) and the third harmonic (TH) from a solid surface at the same time. The important point is that the spectra of these two harmonics overlap in the UV region. So, the interference signals between the SH and TH from the surface of a solid do not include a constant offset phase component due to the linear dispersion in the SHG crystal and can be used to measure the CEP directly. We describe CEP measurement based on the interference between SH and TH. The result showed that the CEP fluctuation in our system was within ±π/6 even without a slow feedback loop. A slow feedback loop, which compensates for an additional CEP drift caused in the amplifier and the compressor, suppressed the CEP fluctuation within ±π/12 for hours.

Citation Download Citation

Hidetoshi Nakano, Atsushi Ishizawa, and Katsuya Oguri "Interference between surface harmonics of carrier-envelope phase controlled few-cycle laser field", Proc. SPIE 7276, Photonics and Optoelectronics Meetings (POEM) 2008: Laser Technology and Applications, 72760D (18 February 2009); https://doi.org/10.1117/12.821427

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