Technical Notes

For further techical information please refer to the documents below, if there are particular technical notes you would like to see please do let us know. You can contact us at sales@edinst.com

What is TCSPC?	Why TCSPC?
Comparison of Stray Light Performance	Choosing the Correct Xenon Bulb

Papers

The supercontinuum laser as a flexible source for quasi-steady state and time resolved fluorescence studies

Roger Fenske, Dirk U. Näther, Richard B. Dennis , S. Desmond SmithProc. SPIE 7580, 75800R (2010);

25th January 2010

ABSTRACT

Commercial Fluorescence Lifetime Spectrometers have long suffered from the lack of a simple, compact and relatively inexpensive broad spectral band light source that can be flexibly employed for both quasi-steady state and time resolved measurements (using Time Correlated Single Photon Counting [TCSPC]). This paper reports the integration of an optically pumped photonic crystal fibre, supercontinuum source¹ (Fianium model SC400PP) as a light source in Fluorescence Lifetime Spectrometers (Edinburgh Instruments FLS920 and Lifespec II), with single photon counting detectors (micro-channel plate photomultiplier and a near-infrared photomultiplier) covering the UV to NIR range. An innovative method of spectral selection of the supercontinuum source involving wedge interference filters is also discussed.

http://spiedigitallibrary.org/proceedings/resource/2/psisdg/7580/1/75800R_1?isAuthorized=no

Proc. SPIE 7580, 75800R (2010); http://dx.doi.org/10.1117/12.842672

New light sources for time correlated single photon counting in commercially available spectrometers

Roger Fenske, Dirk U. Näther, Mark Goossens, S. Desmond Smith

1st October 2006

ABSTRACT

The method of Time Correlated Single Photon Counting requires high repetitive light sources (>100kHz) with pulse widths of ideally less than approximately 20ps. While these light sources have been available for some time now in the form of Ti:Sapphire lasers, picosecond pulsed diode lasers (<90ps) and light emitting diodes (<700ps), they all have the drawback of either having no spectral tunability, or tunability over a very narrow spectral range (10nm-100nm). While this is often sufficient for specific laboratory setups for measurements of fluorescence lifetimes, commercial Fluorescence Lifetime Spectrometers have suffered for a long time from the lack of the availability of simple, compact and relatively inexpensive broad spectral band light sources that can be employed for Time Correlated Single Photon Counting. A new light source as an integral part of a commercial fluorescence lifetime spectrometer will be discussed that allows tunability over a wide spectral band of more than 500nm.

http://spiedigitallibrary.org/proceedings/resource/2/psisdg/6372/1/63720H_1?isAuthorized=no

Proc. SPIE 6372, 63720H (2006); http://dx.doi.org/10.1117/12.688421