A chirp-compensated, injection-seeded alexandrite laser

Citation
P. Bakule et al., A chirp-compensated, injection-seeded alexandrite laser, APP PHYS B, 71(1), 2000, pp. 11-17
Citations number
19
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
APPLIED PHYSICS B-LASERS AND OPTICS
ISSN journal
0946-2171 → ACNP
Volume
71
Issue
1
Year of publication
2000
Pages
11 - 17
Database
ISI
SICI code
0946-2171(200007)71:1<11:ACIAL>2.0.ZU;2-P
Abstract
A Q-switched alexandrite laser suitable for high-resolution spectroscopy is described which produces pulses of 35 mJ energy in a 10 MHz bandwidth, wit h a high-purity TEM00 mode. The laser can be synchronised to external event to within 100 ns. The output pulse length is 120 ns and the repetition rat e 25 Hz. The laser is injection-seeded by a Ti:sapphire laser operating aro und 730 nm. to preserve single-mode seeding under external triggering condi tions, and to obtain small time-jitter, active cavity length control was us ed. In order to achieve the 10 MHz output bandwidth, intra-cavity electro-o ptic modulators were used to compensate for the frequency chirp. The refrac tive index of;alexandrite was found to vary linearly with inversion density with a constant of proportionality equal to 1.6 x 10(-24) cm(3). In pulsed operation at 730 nm, the index change due to this effect is only partially compensated by changes due to ground state phonon relaxation.