Generation of carrier-envelope phase stabilized intense 15 cycle pulses at 175 μm

Abstract

A three-stage high conversion efficiency optical parametric amplifier (OPA) with passively stabilized carrier-envelope phase (CEP) is presented. After passing through an argon-filled hollow fiber and the dispersion compensator for pulse compression, CEP stabilized 0.7 mJ, 1.5 cycle laser pulses at 1.75 μm center wavelength are obtained. Terahertz (THz) emission spectroscopy is adopted to determine the value of CEP, indicating an excellent long-term CEP stability.

Ultrafast Mid-IR Laser Pulses Generation via Chirp Manipulated Optical Parametric Amplification

“…The self-phase modulation (SPM) of an ultrashort pulse in HCF filled with gas can efficiently broaden the pulse spectrum, and after the dispersion compensation, the broadened spectrum can be recompressed to few-cycle durations. The HCF compression has manifested its validity in a number of previous research studies [97][98][99][100].…”

High-Order Harmonic Generation from Solids Dressed by an Intense Terahertz Field

“…A Ti:sapphire chirped-pulse amplifier (35 fs, 4 mJ, 3 kHz) is used to pump a home-built optical parametric amplifier (OPA). The signal and idler pulses generated by the OPA are centered at wavelengths of 1.55 μm and 1.75 μm, respectively [7]. By optical rectification of the signal pulses, THz pulses (centered at ~3 THz) are generated from a 0.6-mm thick DSTMS crystal (electric field waveform shown in the bottom of Fig.…”

Isolated-attosecond-pulse generation due to the nuclear dynamics of H2+in a multicycle midinfrared laser field

“…The generation of isolated attosecond pulses in the water window has an extremely vital significance for studying the ultrafast electronic dynamics of biological samples in water. With the rapid development in ultrafast laser technology, the intense ultrafast laser sources in the midinfrared region have been achieved [7][8][9][10] and have been employed experimentally [2,11], which makes it possible to realize the attosecond pulse generation in the water window. Several approaches have so far been proposed to achieve single attosecond pulses in this spectral region, including the detuned midinfrared two-color scheme [12], midinfrared polarization gating modulated by a weaker linearly polarized pulse [13,14], and the double optical gating with very high intensity [15].…”