Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Simultaneous spatial and spectral imaging of lasing droplets

Not Accessible

Your library or personal account may give you access

Abstract

We present an experimental technique that allows the simultaneous spatial imaging and spectral analysis of falling droplets that exhibit lasing. Single droplet investigations serve as, among other purposes, a preliminary study for spray and combustion researchers. The described setup provides a valuable tool for the evaluation of microdroplet investigations with laser-spectroscopic techniques that rely on laser-induced fluorescence (LIF) or similar spectroscopical phenomena. The emphasis is that both spatial and spectral information are obtained from single-shot images of a falling droplet. Furthermore, combining spatial imaging and a spatially resolving optical multichannel analyzer makes a pointwise rastering of the droplets spectrum possible. This allows for the (almost) unambiguous determination of sources of influence on the spectrum of these droplets—such as geometrical distortion and lasing, nondissolved tracer lumps, and similar phenomena. Although the focus is on the experimental technique itself, we supplement detailed studies of lasing in falling microdroplets. These results were obtained with the aim of developing a system for measuring temperature distributions in droplets and sprays. In the light of these results the practice of calibrating a droplets spectrum by use of a bulk liquid sample needs to be critically reviewed.

© 2005 Optical Society of America

Full Article  |  PDF Article
More Like This
Demonstration of droplet size and vaporization rate measurements in the near field of a two-phase jet with droplet lasing spectroscopy

Philip J. Santangelo, Daniel Flowers, and Ian M. Kennedy
Appl. Opt. 37(24) 5573-5578 (1998)

Two-dimensional imaging of sprays with fluorescence, lasing, and stimulated Raman scattering

Ali Serpengüzel, J. Christian Swindal, Richard K. Chang, and William P. Acker
Appl. Opt. 31(18) 3543-3551 (1992)

Microdroplet identification and size measurement in sprays with lasing images

Ali Serpengüzel, Serkan Küçükşenel, and Richard K. Chang
Opt. Express 10(20) 1118-1132 (2002)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (10)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (4)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved