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Your search keyword '"Archambault, J. L."' showing total 38 results
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38 results on '"Archambault, J. L."'

1. Single frequency lasers and efficient cladding-pumped lasers using Yb3+-doped silica fibre

Author

Dawes, J. M., Helen Pask, Archambault, J. L., Townsend, J. E., Hanna, D. C., Reekie, L., and Tropper, A. C.

Abstract

Yb3+-doped germanosilicate fibre has been demonstrated to be a versatile host for laser action at wavelengths from 1 to 1.2µm. It can be pumped at wavelengths from 800-1064nm, and the emission band extends from 970-1200 nm, including wavelengths of interest for specific applications, e.g., 1020nm for pumping of 1.3µm Pr3+-doped fibre amplifiers, 1140nm for pumping of Tm3+-doped fluoride fibre upconversion lasers, and 1083nm for optical pumping of 3He.

Published
1994

2. All Solid State Blue Room-temperature Thulium-doped Upconversion Fibre Laser

Author

Barber, P. R., Mackechnie, C. J., Lauder, R. D. T., Helen Pask, Tropper, A. C., Hanna, D. C., Butterworth, S. D., Mccarthy, M. J., Archambault, J. L., and Reekie, L.

Abstract

Following the report by Grubb [1] we describe an all solid state, single wavelength pumped, cw, room temperature, upconversion laser which has operated in the blue between 475 nm and 483 nm or in the near infrared at 778 nm.

Published
1994

5. HE sub 1m Self Guided Modes: Vector Solutions and Stability

Author

ECOLE POLYTECHNIQUE MONTREAL (QUEBEC), Archambault, J. L., Lacroix, S., Snyder, A. W., ECOLE POLYTECHNIQUE MONTREAL (QUEBEC), Archambault, J. L., Lacroix, S., and Snyder, A. W.

Abstract

Self-focusing in a medium of intensity-dependent refractive index has been extensively studied since the 60's. A particular case of self-focusing is the self-guided mode for which the natural tendency of a light beam to diffract is exactly compensated by the presence of a positive Kerr-law nonlinearity. A self-guided mode can also be seen as a mode of the waveguide it induces. In this paper, we present a study of the HE sub 1m self-guided modes of circular cross-section in an ideal (homogeneous, non-saturable and without absorption) Kerr-law nonlinear medium. Although scalar theory predicts, within its domain of validity, that these modes are unstable, our exact vectorial analysis shows that they are stable to cylindrical perturbations. This result is in accordance with the recent work of Chen and Snyder who established the need of taking into account the polarization of self-guided cylindrical TE and TM modes., This article is from 'OSA Proceedings of the Topical Meeting on Nonlinear Guided-Wave Phenomena Held in 2-4 September 1991. Cambridge, England United Kingdom. Volume 15', AD-A253 471, p252-255.

Published
1992

37. Photodegradation of near-infrared-pumped Tm(3+)-doped ZBLAN fiber upconversion lasers.

Author

Booth IJ, Archambault JL, and Ventrudo BF

Abstract

Photodegradation has been observed in Tm(3+)-doped ZBLAN fiber lasers pumped with laser diodes at 1135 nm. After upconversion lasing at 482 nm, the fiber develops color centers that absorb strongly at wavelengths below ~650 nm, affecting further upconversion lasing. The rate of damage formation is strongly dependent on the pump power level and on the thulium concentration. The color centers are bleached by intense blue light but recover with thermal excitation and can be removed by thermal annealing at temperature near 100 degrees C.

Published
1996
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38. Brachial plexus stretch injury.

Author

Archambault JL

Subjects
Brachial Plexus physiopathology, Humans, Spinal Nerves physiopathology, Athletic Injuries physiopathology, Brachial Plexus injuries
Published
1983
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