Search

Your search keyword '"Balembois, F."' showing total 135 results
Start Over Author "Balembois, F." Search Limiters Peer Reviewed
135 results on '"Balembois, F."'

3. Absolute calibration of a streaked optical pyrometer at nanosecond time scale with a luminescent concentrator.

Author

Nourry-Martin, M., Denoeud, A., Chollet, C., Bonneau, M., Vinci, T., Ravasio, A., Brygoo, S., Darbon, S., and Balembois, F.

Subjects
PYROMETERS, ION accelerators, TEMPERATURE measurements, CALIBRATION, LIGHT sources, ACCELERATOR mass spectrometry
Abstract

The Streaked Optical Pyrometer (SOP) is a visible diagnostic widely used to study the warm dense matter regime at high energy laser facilities, gas guns, or ion accelerators. It is usually coupled with a Velocity Interferometer System for Any Reflector (VISAR) diagnostic for simultaneous shock wave velocity, reflectivity, and temperature measurements to study the Equation of State (EOS) of materials. While VISAR is a well-mastered technology that provides velocity measurements with low relative uncertainties (close to percent), SOP diagnostics still suffer from high imprecision. In this article, we present a new calibration method in order to obtain absolute temperature measurements with reduced uncertainties. This approach is based on a novel light source: a Ce:YAG luminescent concentrator pumped by LEDs. This device produces enough optical power for calibration at the nanosecond sweep duration of the streak camera. As a demonstration, it has first been installed at the LULI facility and tested on quartz samples shocked at temperatures above 4000 K. [ABSTRACT FROM AUTHOR]

Published
2023
Full Text
View/download PDF

29. Yb3+ doped (Ca,Sr,Ba)F2 for high power laser applications.

Author

Doualan, J., Camy, P., Benayad, A., Ménard, V., Moncorgé, R., Boudeile, J., Druon, F., Balembois, F., and Georges, P.

Abstract

Yb3+ doped CaF2 has been proved in the last years to be one of the most attractive Yb3+ doped materials for broadly tunable, high power and short-pulse laser operation as well as for bi-frequency laser and THz wave generation. Interesting results were also obtained by using Yb3+:CaF2 as regenerative amplifier of femtosecond pulses in the mJ level with very high damage threshold and, even more recently, prove was made that cryogenically cooled materials could lead to even more promising performance at high power levels. The purpose of the present paper consists first in a clarification of a number of luminescence, thermal and laser properties as well as in the description of the most recent laser results, obtained in particular at low temperature. [ABSTRACT FROM AUTHOR]

Published
2010
Full Text
View/download PDF

30. Efficient cw operation of diode-pumped Nd:YLF lasers at 1312.0 and 1322.6 nm for a silver atom optical clock

Author

Louyer, Y., Balembois, F., Plimmer, M.D., Badr, T., Georges, P., Juncar, P., and Himbert, M.E.

Subjects
*SOLID-state lasers, *SILVER
Abstract

We describe the efficient cw operation of two Nd:YLF lasers at 1312.0 and 1322.6 nm for the development of a silver atom optical clock. For a simple linear cavity laser configuration investigated at these wavelengths, we have obtained an output power of 3.6 W at 1312.0 nm for 13.8 W of absorbed pump power (λ=806 nm) and 4.8 W output at 1322.6 nm with 16.3 W pump. At 1312.0 nm, using a twisted-mode cavity, a single-frequency output power of 750 mW has been obtained. Single-frequency operation (450 mW) at 1322.6 nm was achieved using an intra-cavity solid etalon. [Copyright &y& Elsevier]

Published
2003
Full Text
View/download PDF

31. A new 3D multipass amplifier based on Nd:YAG or Nd:YVO[sub 4] crystals.

Author

Forget, S., Balembois, F., Georges, P., and Devilder, P.-J.

Subjects
LIGHT amplifiers, CRYSTALS, LASERS
Abstract

We report on new, simple and efficient multipass amplifiers using prisms or corner cubes to perform several passes in different planes of incidence. This scheme provides an optimised overlap between the signal passes and the pumped volume. We investigated our amplification geometry with Nd:YAG and Nd:YVO[sub 4] crystals: the use of a low-doped (0.3%) Nd:YVO[sub 4] crystal allowed better thermal behaviour and higher performance. We amplified a pulsed microlaser (110 mW of average power at 1064 nm) and obtained a diffraction-limited output beam with an average power of 5.7W for 15 W of pump power and a small-signal gain of 56 dB in a six-pass configuration. [ABSTRACT FROM AUTHOR]

Published
2002
Full Text
View/download PDF

42. New green self-frequency-doubling diode-pumped Nd:Ca[sub 4] GdO(BO[sub 3] )[sub 3] laser.

Author

Mougel, F., Augé, F., Aka, G., Kahn-Harari, A., Vivien, D., Balembois, F., Georges, P., and Brun, A.

Subjects
LASERS, CRYSTALS, DIODES, TITANIUM, SAPPHIRES
Abstract

Abstract. Results on green laser performances are reported for a new efficient self-frequency-doubling (SFD) oxoborate crystal: Nd[sup 3+]:Ca[sub 4]GdO(BO[sub 3])[sub 3] (Nd:GdCOB). 21 mW of green cw laser emission for an absorbed pump power of 820 mW were achieved under laser diode-pumping. 64 mW of green cw laser output were obtained with 1 W of absorbed pump power under titanium-sapphire pumping. Its availability in large-size crystals with good optical quality makes Nd:GdCOB a true challenger to the best SFD laser crystal reported so far: Nd:YA1[sub 3](BO[sub 3])[sub 4] (Nd:YAB or NYAB). [ABSTRACT FROM AUTHOR]

Published
1998
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results