14.02.2024 | Laser-induced fluorescence spectroscopy - How to use the potential of your measurement technology with high repetition rate nanosecond lasers

In laser-induced fluorescence spectroscopy, a pulsed tunable laser is often used for excitation. The light source should have good beam quality and stability across the entire tuning range from UV to IR. The intensity of the fluorescence signal depends on the absorption of the sample and the intensity of the laser pulse, with excessive power density or pulse energy being problematic, especially with biological samples. Tunable nanosecond lasers are a cost-effective solution compared to lasers with shorter pulse durations and also enable narrow-band excitation.

Most commercially available nanosecond lasers offer repetition rates of up to typically 100 Hz. Since the additional measurement technology used in the experiment usually supports significantly higher repetition rates in the kHz range, the light source proves to be a limiting factor here.

TOPAG, as German distributor for the Lithuanian laser manufacturer Ekspla, specializes in highly repetitive, tunable nanosecond lasers. The NT242 model with 1 kHz, which has been tried and tested for many years, and the recently developed NT262 with 10 kHz repetition rate are available. Both models enable you to use the potential of your measurement technology and shorten measurement times by a factor of 5-10.

Based on many years of experience with the NT242, the manufacturer Ekspla has developed the new tunable nanosecond laser NT262 with gapless tuning range of 210-2600 nm, narrow bandwidth of <3 cm-1, output power of up to 700 mW and 10 kHz repetition rate. Fast software-controlled scanning of up to 1000 cm-1/s with high scanning resolution is possible. The integration of pump laser and OPO in a compact housing ensures high system stability. An integrated air purification system protects the laser from contamination by moisture and organic substances. The new OPO design allows lower energy density and fewer thermal effects on the crystals at the same output power level and extends the lifetime of optical components which minimizes long-term operating costs.

In addition to laser-induced fluorescence, the NT262 is also successfully used for other applications such as pump-probe spectroscopy, photoacoustic imaging and photolysis experiments.

 

 

For more details, please visit our product page on NT242 and NT262

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TOPAG Lasertechnik GmbH
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Phone: +49 6151 42944 0
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E-mail: info@topag.de