Development of sol-gel saturable absorber for integrated Q-switched lasers
| Autor: | Lionel Bastard, François Royer, Thomas Moncond’huy, Marie-Françoise Blanc-Mignon |
|---|---|
| Přispěvatelé: | Institut de Microélectronique, Electromagnétisme et Photonique - Laboratoire d'Hyperfréquences et Caractérisation (IMEP-LAHC ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Laboratoire Hubert Curien [Saint Etienne] (LHC), Institut d'Optique Graduate School (IOGS)-Université Jean Monnet [Saint-Étienne] (UJM)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
[PHYS]Physics [physics]
Materials science business.industry Saturable absorption 02 engineering and technology engineering.material Laser 7. Clean energy law.invention Wavelength 020210 optoelectronics & photonics Optics Coating law Modulation 0202 electrical engineering electronic engineering information engineering engineering Photonics business Absorption (electromagnetic radiation) Waveguide ComputingMilieux_MISCELLANEOUS |
| Zdroj: | SPIE OPTO SPIE OPTO, Jan 2017, San Francisco, United States. pp.1010610 |
| Popis: | The diversity of integrated photonic sensors such as LIDARs increased in part thanks to integrated laser sources development. Glass integrated lasers fit well sensing demand because of their high durability and great integration potential. We propose here a new kind of saturable absorber (SA) for glass integrated Q-switched lasers, based on a solgel matrix. This is intended to improve durability and output power of existing lasers, whose SA is often based on plastic materials. While sol-gel is already used for optical limiting devices, its use as a host for SA has not been investigated so far. Due to its interesting properties such as durability, high laser induced damage threshold (LIDT) and coating convenience, it should also be a good candidate to realize a reliable SA matrix. We mixed a hybrid organic-inorganic sol with toluene and (bis(4_dimethylaminodithiobenzil) nickel – BDN I, a SA dye molecule. Drops of this mix have been coated and annealed to obtain a SA sol-gel thick layer. We modeled BDN I with a four energy-level system and measured its absorption over optical input power at the wavelength of 1064nm in order to extract its physical parameters: absorption cross sections and relaxation time. This SA showed good performances with 30% modulation depth. This sol-gel has also been spin coated on ion-exchanged glass integrated waveguide. The characteristics of this waveguide SA have been measured and the evanescent light interaction between the waveguide and the saturable absorber layer has been modeled. This study will allow further integrated Q-switched lasers design. |
| Databáze: | OpenAIRE |
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