| Issue |
J. Eur. Opt. Soc.-Rapid Publ.
Volume 11, 2016
|
|
|---|---|---|
| Article Number | 16004 | |
| Number of page(s) | 6 | |
| DOI | https://doi.org/10.2971/jeos.2016.16004 | |
| Published online | 06 February 2016 | |
Regular paper
An analytical model for top-hat long transient mode-mismatched thermal lens spectroscopy
Physics Department, Faculty of Science, Shahid Chamran University of Ahvaz, Ahvaz, 61357-43135, Iran
Received:
1
October
2015
Revised:
13
December
2015
It has been shown that a top-hat excitation beam gives rise to a more sensitive signal for the thermal lens spectroscopy (TLS). Recently, a numerical model has been presented for a top- hat excitation beam in a dual-beam mod-mismatched TLS [Opt. Lett. 33(13), 1464-1466 (2008)]. In this work, we present a full analytical version of this model. Our model was based on a new solution of time-dependent heat equation for a finite radius cylindrical sample exposed to a top-hat excitation laser beam. The Fresnel diffraction integration method was then used to calculate on-axis probe-beam intensity variations due to thermal lensing by taking the aberrant nature of the thermal lens into account. The model was confirmed with experimental data of LSCAS-2 with an excellent agreement.
Key words: Thermal lens spectroscopy / heat equation / top-hat profile / thermal lensing
© The Author(s) 2016. All rights reserved.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.