Richard Moncorge

Frequency doubling and sum-frequency mixing operation at 469.2, 471, and 473 nm in Nd:YAG

We report CW blue laser operation at 469.2, 471, and 473xa0nm by efficient intracavity second-harmonic generation and sum-frequency generation of the R2→Z5 (938.5xa0nm) and R1→Z5 (946xa0nm) F43/2→I49/2 intermultiplet transitions in Nd:YAG with an LiB3O5 nonlinear crystal. Single-wavelength laser operation at 469.2xa0nm and multiwavelength operation at 469.2, 471, and 473xa0nm are obtained with maximum output powers of 1.4 and 0.15xa0W, respectively, by using a glass etalon as frequency selector. The 469xa0nm blue laser is an efficient pumping source of Pr3+-doped materials.

Sub-50 fs, Kerr-lens mode-locked Yb:CaF2 laser oscillator delivering up to 2.7 W

By means of a high-brightness optical pumping scheme with a fiber laser, we demonstrate Kerr-lens mode locking (KLM) with an Yb:CaF2 laser crystal. Stable 48 fs pulses are produced at an average power of 2.7 W.

InGaN-LD-Pumped Continuous-Wave Deep Red Laser at 670 nm in Pr 3+ :LiYF 4 Crystal

We report the first laser operation at π-polarized 670.34-nm deep red laser in a 2-W InGaN-LD-pumped Pr3+:LiYF4 (Pr:YLF) crystal with the aid of a 0.1-mm intracavity etalon, to the best of our knowledge. The maximum output power of this laser emission was up to 87.6 mW with slope efficiency of ~11.9

Kerr lens mode-locking of Yb:CaF2

% with respect to the absorbed pump power. The beam propagation factors in x-direction and y-direction were measured to be 1.49 and 1.05, respectively.

Enhanced-sensitivity version of the Baryscan technique

Through high-brightness optical pumping with a fiber laser, we demonstrate a soft-aperture Kerr lens modelocked (KLM) operation in a Yb:CaF2 crystal. Stable 117 fs pulses are producing at an average power of 560 mW.

Highly doped Tm:YLF LPE crystalline layers for 1.9µm lasers

A promising alternative to the widespread Z-scan technique has been recently proposed. This technique, named Baryscan, is based upon the use of a Position Sensitive Detector (PSD) and is about 170 times more sensitive than the Z-scan technique while preserving its simple theoretical scheme and ease of implementation. In this paper, we demonstrate both numerically and experimentally that inserting a phase plate before the PSD and setting an opaque disk as close as possible to its active area results in a substantial sensitivity enhancement of the Baryscan technique.

Fluoride Planar Waveguide Lasers

Laser operation at 2 µm is reported using an epitaxial, highly Tm-doped, 240 µm thick LiYF4 layer grown by liquid phase epitaxy. Simulation of laser operation is compared to experiments.

Yb doped Fluorides for High Power and Short-Pulse Laser Applications

High optical quality rare-earth-doped YLiF4 layers were grown by the liquid phase epitaxy technic. Optical characterization, CW and Q-switch laser operation obtained with these fluorides waveguides will be presented and discussed in this communication. Article not available.

High-power quasi-two-level laser with Yb:CaF2 at 77 K emitting at 993 nm

We present an overview of laser results we obtained with Yb-doped calcium-fluoride. Spectral and thermal properties will be discussed, and experimental demonstration on high-power and ultrashort pulse oscillators and amplifiers will be presented.

Broadband Yb:CaF 2 Regenerative Amplifier for Millijoule Range Ultrashort Pulse Amplification

Laser operation at 992.7 nm under 981-nm diode-pumping is demonstrated with Yb:CaF2 operating at 77 K leading to a extremely-low quantum-defects of 1.2 % with 33W average power with an optical-efficiency of 35 %.