- Tytuł:
- Modelling of vertical-cavity surface-emitting laser beam collimation using a nanostructured gradient index microlens
- Autorzy:
-
Nowosielski, J M
Waddie, A. J.
Taghizadeh, M. R.
Buczynski, R. - Powiązania:
- https://bibliotekanauki.pl/articles/174429.pdf
- Data publikacji:
- 2013
- Wydawca:
- Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
- Tematy:
-
gradient index optics
microlens
soft glass - Opis:
- In this paper we show that the recently developed nanostructured gradient index (nGRIN) rod microlens can be utilised for the collimation of the beam generated by a vertical-cavity surface-emitting laser (VCSEL). The modelling of the nanostructured lens structure is performed using the finite difference time domain (FDTD) method with realistic nGRIN parameters and a Gaussian model of the light source. The large refractive index gradient of the nanostructured microlens allows the final microlens thickness to be only 70 μm with a diameter of 10 μm. Successful collimation of a single-mode VCSEL beam with a waist half-width of 1.53 μm is presented with a reduction in divergence half-angle from 10.1° to 3.3°. We show that the linear polarisation of the incident beam is preserved as well as presenting the tolerance of this type of lens to variations in overall thickness.
- Źródło:
-
Optica Applicata; 2013, 43, 4; 761-772
0078-5466
1899-7015 - Pojawia się w:
- Optica Applicata
- Dostawca treści:
- Biblioteka Nauki
Artykuł