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We demonstrate for the first time that fine varying of the density gradient of a plasma mirror along with laser spatial phase on target allows total control over the harmonic generation mechanisms and harmonic spatial properties. An analytical model is also proposed.
We report high power operation of a Kagome-type HC-PCF at 1 μm. We demonstrate guidance of thin disk laser beam with powers in excess of 100 W in cw and 75 W in modelocked operation.
Reduction of absorption coefficient due to heat-up in hot-band pumped Nd:YAG was studied, and it was much smaller than cold-band pumping. In addition, the necessity of correction in the traditional model for line-bandwidth became clear.
We report for the first time an alternative way to detect the mode splitting in a silica microcavity through measuring the heterodyne beat note signal of a Raman laser mode.
We report a unique design of a Raman silicon laser using a photonic crystal high-Q nanocavity without the reverse-biased p-i-n diode, which leads to the continuous-wave lasing operation with ultralow threshold power of ∼1 μW.
A real-time resonance tracking method is described and experimentally demonstrated in controlling an injection-seeded Q-switched Nd:YAG laser for stable single-axial-mode operation. Noise insensitive single axial mode with 100% recurrence is achieved with mW seeding power.
We have demonstrated amplitude modulation of terahertz quantum cascade lasers by means of the injection of near-infrared laser pulses. Injected 770nm and 1350nm laser pulses both strongly suppressed the output power.
We propose and experimentally demonstrate new beam solutions in form of azimuthally symmetric higher-order Bessel-Gauss beams. We experimentally observe these beams as higher-order eigenmodes in optical resonators consisting of aspheric mirrors.
The optical Kerr response of hydrogen atom submitted to a strong and short near infrared laser pulse excitation is studied by solving the full 3D time-dependent Schro¨dinger equation. The nonlinear polarization evaluated at the driving field frequency is compared to the canonical expression derived from perturbation theory. A discrepancy between the two models is observed at large intensity affecting...
We report a metamorphic GaSb-based laterally coupled distributed-feedback laser grown on a GaAs substrate that operates continuous wave at room temperature with a total output power of 40 mW.
We report a passively Q-switched all-fiber laser using a large mode area Yb3+-doped fiber cladding-pumped at 915 nm and an unpumped single-mode Yb3+-doped saturable absorber fiber. 60 μΐ 80 ns pulses at 1030 nm are reported.
Co-seeding method at 1.0μm was applied in order to scale up the 1.5μm output power of a 976nm pumped single-frequency Er:Yb-codoped triple clad fiber amplifier to a maximum output power of 50W.
We present an Yb:YAG modelocked thin-disk laser with a record-high average output power of 275 W, a pulse duration of 583 fs and a pulse energy of 16.9 μJ. Furthermore, we present first experiments towards higher pulse energies.
We present an innovative mirrorless optofluidic random laser where the optical cavity has been replaced by a random scattering structure. We achieve emission control at any desired wavelength by iteratively shaping the optical pump profile.
We demonstrate 2W CW output power with a DBR QCL mounted epi-down at 20 °C. Single mode operation with a SMSR of 30 dB was achieved with the wavelength around 4.48 μm. The maximum pulsed peak power of this laser reached 3.36 W at 20 °C. The maximum pulsed and CW WPEs reached 14.7 % and 10.3 % at 20 °C, respectively.
High-brightness 910 nm wavelength edge-emitting laser arrays integrated with a phase-shifter have been designed. Over 450 mW/facet with M2 < 3 is achieved experimentally. Such devices show bright future for low cost and easy fabrication.
Shock ignition [1] is an approach to direct-drive inertial confinement fusion (ICF) in which the stages of compression and hot spot formation are partly separated. The fuel is first imploded at lower velocity than in conventional ICF. Close to stagnation an additional intense laser spike drives a strong converging shock, which contributes to hot spot formation. Shock ignition shows potentials for...
A violet multi-mode diode laser and cavity ring-down spectroscopy were used to detect trace amounts of NO2. The laser excites multiple cavity modes, simplifying the detector alignment and making it less susceptible to vibration.
We theoretically incorporate chirality into laser cavities and utilize it to demonstrate circularly-polarized resonant modes. In absence of extrinsic magnetism, these modes may induce a net spin polarization via selection rules when lasing.
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