Stimulated LIF studied using pulsed digital holography and modelling

Eynas Amer; Jonas Stenvall; Per Gren; Mikael Sjödahl

doi:10.1117/12.2020505

13 May 2013 Stimulated LIF studied using pulsed digital holography and modelling

Eynas Amer, Jonas Stenvall, Per Gren, Mikael Sjödahl

Proceedings Volume 8788, Optical Measurement Systems for Industrial Inspection VIII; 87883M (2013) https://doi.org/10.1117/12.2020505
Event: SPIE Optical Metrology 2013, 2013, Munich, Germany

Abstract

A frequency tripled Q-switched Nd-YAG laser (wavelength 355 nm, pulse duration 12 ns) has been used to pump Coumarin 153 dye solved in ethanol. The laser induced fluorescence (LIF) spectrum has been recorded using a spectrometer at different dye concentrations. The frequency doubled 532 nm beam from the same laser is used as a probe beam to pass through the excited volume of the dye. Because of stimulated emission an increase of the probe (532 nm) beam energy is recorded and a reduction of the spontaneous fluorescence spectrum intensity is observed. A model was developed that approaches the trend of the gain as a function of the probe beam energy at low dye concentrations (less than 0.08 g/L). The stimulated LIF is further recorded using digital holography. Digital holograms were recorded for different dye concentrations using collimated laser light (532 nm) passed through the dye volume. Two holograms without and with the UV laser beam were recorded. Intensity maps were calculated from the recorded digital holograms and are used to calculate the gain of the green laser beam due to the stimulated fluorescence emission which is coupled to the dye concentration. The gain of the coherent 532 nm beam is seen in the intensity maps and its value is about 40% for a dye concentration of 0.32 g/L and decreases with the decrease of the dye concentration. The results show that pulsed digital holography can be coupled to the stimulated LIF effect for imaging fluorescent species.

Citation Download Citation

Eynas Amer, Jonas Stenvall, Per Gren, and Mikael Sjödahl "Stimulated LIF studied using pulsed digital holography and modelling", Proc. SPIE 8788, Optical Measurement Systems for Industrial Inspection VIII, 87883M (13 May 2013); https://doi.org/10.1117/12.2020505

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
9 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Laser beam diagnostics

Laser induced fluorescence

Digital holography

Luminescence

Molecules

Holograms

Beam splitters

Show All Keywords

Keywords/Phrases

Search In:

Publication Years