Laser action along and near the optic axis of a holmium-doped KY(WO 4 ) 2 crystal
| hal.structure.identifier | Laboratoire Ondes et Matière d'Aquitaine [LOMA] | |
| hal.structure.identifier | Institut Franco-Allemand de Recherches de Saint Louis [ISL] | |
| dc.contributor.author | CATTOOR, Romain | |
| hal.structure.identifier | Laboratoire Ondes et Matière d'Aquitaine [LOMA] | |
| dc.contributor.author | MANEK-HÖNNINGER, Inka | |
| hal.structure.identifier | FEE Gmbh | |
| dc.contributor.author | RYTZ, Daniel | |
| hal.structure.identifier | Laboratoire Ondes et Matière d'Aquitaine [LOMA] | |
| dc.contributor.author | CANIONI, Lionel | |
| hal.structure.identifier | Institut Franco-Allemand de Recherches de Saint Louis [ISL] | |
| dc.contributor.author | EICHHORN, Marc | |
| dc.date.created | 2014-08-14 | |
| dc.date.issued | 2014-11-15 | |
| dc.identifier.issn | 0146-9592 | |
| dc.description.abstractEn | We demonstrate the first (to our knowledge) quasi-three-level conical refraction laser operating at 2 μm, with 1.6 W of output power at 2074 nm, using a holmium-doped KYWO 4 2 crystal. A maximum slope efficiency of 52% has been achieved, along the optic axis with respect to the absorbed pump power. Furthermore, lasing operation around the optic axis has been performed. In this case, a maximum output power of 3 W has been reached, with a slope efficiency better than 70%, which are the best performances ever reported on this material. Studies of conical refraction (CR) have recently revived. When a Gaussian light beam propagates along the optic axis of a biaxial crystal, under certain conditions a two ring-shaped beam can be observed, at the exit face of the crystal. Several publications describe this effect, theo-retically and experimentally [1–4]. Recent availability of long biaxial crystals, with good optical quality, facili-tates CR studies. Therefore, several applications of this effect have recently been investigated, such as optical tweezers [5], particle trapping [6], beam shaping [7–11], and microscopy [12]. There are also some publications about laser operation along an optic axis of a biaxial crys-tal, the first publication being [13]. Using a short (3 mm long) biaxial crystal of a CR-cut ytterbium-doped KGdWO 4 2 (KGW), the output polarization of their laser was modified, by translating the output coupler mirror. The researchers obtained a slope efficiency of 60% along the CR axis, which is similar to the value obtained for a classical N g -cut orientation. However, the threshold was 2× higher for CR orientation. A few years later, [14,15] presented a four-level conical refraction laser, made with neodymium-doped KGW. The researchers obtained both a Gaussian and CR output beam. They reported a slope efficiency close to the quantum defect limit [14], and no influence of any thermal effect over the measurement range (up to 3 W at 1067 nm) was observed. The thermo-optic properties of neodymium-doped KGW were studied in [16]. The researchers show the anisotropy of the thermo-optic properties, along this propagation direc-tion with a short crystal (1 mm long). However, the effect of CR inside the cavity, changing the light distribution in-side the crystal, is still not well-known. In this Letter, we report the first experimental results (to our knowledge) of a holmium-doped KYWO 4 2 (KYW) CR laser, showing laser action along the CR axis. Measurements near the optic axis have also been per-formed, in order to be able to compare CR and Gaussian beam intracavity laser performance. | |
| dc.language.iso | en | |
| dc.publisher | Optical Society of America - OSA Publishing | |
| dc.subject.en | Laser and laser optics | |
| dc.subject.en | Laser beam shaping | |
| dc.subject.en | Laser resonators | |
| dc.subject.en | Lasers | |
| dc.subject.en | solid-state | |
| dc.title.en | Laser action along and near the optic axis of a holmium-doped KY(WO 4 ) 2 crystal | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1364/OL.39.006407 | |
| dc.subject.hal | Physique [physics]/Physique [physics]/Optique [physics.optics] | |
| bordeaux.journal | Optics Letters | |
| bordeaux.page | 6407-6410 | |
| bordeaux.volume | 39 | |
| bordeaux.issue | 22 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-01094397 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-01094397v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Optics%20Letters&rft.date=2014-11-15&rft.volume=39&rft.issue=22&rft.spage=6407-6410&rft.epage=6407-6410&rft.eissn=0146-9592&rft.issn=0146-9592&rft.au=CATTOOR,%20Romain&MANEK-H%C3%96NNINGER,%20Inka&RYTZ,%20Daniel&CANIONI,%20Lionel&EICHHORN,%20Marc&rft.genre=article |
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