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Submitted on 1 Jan 1987
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PHYSICAL PROPERTIES AND TUNABLE LASER ACTION OF VERNEUIL GROWN SINGLE
CRYSTALS OF Al2O3 : Ti3+ (Preliminary data)
R. Moncorge, P. Pradel, F. Chatel, G. Boulon, D. Vivien, A. Lejus, R.
Collongues, V. Djevahirdjian, K. Djevahirdjian, R. Cagnard
To cite this version:
R. Moncorge, P. Pradel, F. Chatel, G. Boulon, D. Vivien, et al.. PHYSICAL PROPERTIES AND TUNABLE LASER ACTION OF VERNEUIL GROWN SINGLE CRYSTALS OF Al2O3 : Ti3+ (Preliminary data). Journal de Physique Colloques, 1987, 48 (C7), pp.C7-389-C7-389.
�10.1051/jphyscol:1987793�. �jpa-00227098�
JOURNAL D E PHYSIQUE
Colloque C7, supplement au n 0 1 2 , Tome 48, decembre 1987
PHYSICAL PROPERTIES AND TUNABLE LASER ACTION OF VERNEUIL GROWN SINGLE CRYSTALS OF A1,0, : T i 3 + (Preliminary data)
R. MONCORGE, P. PRADEL, F. CHATEL, G. BOULON, D. VIVIEN*, A.M. LEJUS* , R. COLLONGUES* , V. DJEVAHIRDJIAN' ,
K. DJEVAHIRDJIAN" and R. CAGNARD"
Laboratoire de Physico-Chimie des Materiaux Luminescents, (CNRS UA-442 et Greco Celphyra), Universite Claude Bernard Lyon-I, F-69622 Villeurbanne Cedex, France
' ~ a b o r a t o i r e de Chimie Appliquke de 1'Etat Solide, ENSCP, CNRS UA-302, F-75231 Paris Cedex 05, France
* * ~ o c i t 2 t ~ Djeva, CH-1870 Monthey, Switzerland
Titanium doped sapphire (A1203:~i3+) is now recognized as one of the most attractive candidate for efficient and broadly tunable solid state laser operation between 650 and 1050 nrn*.
Most of .the crystals used for this application are usually grown by the Czokralski (CZ) or the heat exchangsr method (H. E. M. )
.
Loss problems arise with the CZ samples because of the existence of a non negligible and unwanted absorption band around 800nm, i.e. precisely in the wavelength domain of laser emission.Namely, though they are? lower doped than the CZ crystals, the H.E.M. san~ples have a more favorable optical quality and they give the best laser performance.
In this comrnunicatior~, report is made on equivalent perforatanoe of Verneuil grown ~ 1 : ~ ~ 0i ~single crystals. ~ + Several samples of these high optical quality single crystals were
choosen and scanned in transmission. Their fluorescence quantum efficiencies were determined and compared to their laser performance. The best of them have given 50 % slope efficiencies with a 75 % output coupler. Tuning was accomplished between 680 and 810 nm with only one set of mirrors and up to 7mJ of output energy (only limited by surface damage of . t h e mirrors) were obtained.
*
Conference on Tunalbe Solid-State Lasers I1 (Zigzag, Oregon.USA. June 1986) ed. A. B. Budgor, L. Esterowitz and L.G. Deshazer.
Spriager VerlaQ 52 phrt VI p. 202-250
Article published online by EDP Sciences and available at http://dx.doi.org/10.1051/jphyscol:1987793
