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Proceedings Paper

High-repetion-rate picosecond diode lasers for potential use in single-molecule detection
Author(s): Uwe Ortmann; Rolf Krahl; Gerald Kell; Rainer Erdmann; Joerg Enderlein; Edgar O. Klose
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Paper Abstract

Recently, major advances have been reached in the fluorescence detection of small amounts of molecules in liquids, making possible even the detection of single molecules in liquid flows. Significant improvements of fluorescence detection techniques make single molecule detection feasible for many applications, especially in the field of molecular biology and genetics. For such techniques new compact and inexpensive lasers are desirable. laser diode systems are the most favorable candidates for such light sources. With the expanding number of available NIR-fluorescent dyes, the importance of cheap and reliable laser light sources above 630 nm will increase. But not only cw-laser systems are of growing interest. In a number of recent papers, the application of time-resolved fluorescence detection down to a single molecule level was shown to be of great use for further improving detection efficiency. Thus, one needs high- repetition rate pulsed laser diode systems with good time and optical performance, and detection electronics with high-speed and large data throughput. Here we present such a system, combining a pulsed diode laser system with excellent electrical and optical parameters, and a high speed electronic for time correlated single photon counting. This system is suitable for a broad range of applications in ultra sensitive fluorescence detection.

Paper Details

Date Published: 1 April 1996
PDF: 5 pages
Proc. SPIE 2680, Ultrasensitive Biochemical Diagnostics, (1 April 1996); doi: 10.1117/12.237636
Show Author Affiliations
Uwe Ortmann, BiosQuant GmbH (Germany)
Rolf Krahl, BiosQuant GmbH (Germany)
Gerald Kell, BiosQuant GmbH (Germany)
Rainer Erdmann, BiosQuant GmbH (Germany)
Joerg Enderlein, BiosQuant GmbH (Germany)
Edgar O. Klose, BiosQuant GmbH (Germany)

Published in SPIE Proceedings Vol. 2680:
Ultrasensitive Biochemical Diagnostics
Gerald E. Cohn; Steven A. Soper; C. H. Winston Chen, Editor(s)

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