Mid-infrared waveguides in zinc sulfide crystal
Depressed cladding optical waveguides have been fabricated in a zinc sulfide (ZnS) crystal by femtosecond laser inscription. The structures support single- or multi-mode guidance at the mid-infrared wavelength of ~4 μm. The two-dimensional refractive index profiles of the single-mode waveguides have...
| Autores: | ; ; ; ; |
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| Tipo de documento: | Artigo |
| Data de publicação: | 2013 |
| País: | España |
| Recursos: | Universidad de Salamanca (USAL) |
| Repositório: | GREDOS. Repositorio Institucional de la Universidad de Salamanca |
| OAI Identifier: | oai:gredos.usal.es:10366/123365 |
| Acesso em linha: | http://hdl.handle.net/10366/123365 |
| Nível de acesso: | Acesso aberto |
| Palavra-chave: | Waveguides Femtosecond lasers Microfabrication Mid-infrared 2209.10 Láseres 2209.09 Radiación infrarroja |
| Resumo: | Depressed cladding optical waveguides have been fabricated in a zinc sulfide (ZnS) crystal by femtosecond laser inscription. The structures support single- or multi-mode guidance at the mid-infrared wavelength of ~4 μm. The two-dimensional refractive index profiles of the single-mode waveguides have been reconstructed, and the modal profiles of TE and TM modes were calculated numerically, that show very good agreement with the measured near-field modal profiles. The minimum propagation losses of the multimode cladding waveguides at 4 μm were ~1.1 dB/cm for the TE polarization and ~1.3 dB/cm for the TM polarization. |
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