NL230
Gütegeschalteter DPSS-Laser mit hoher Pulsenergie
Die kurz gepulsten Nanosekundenlaser der NL230-Serie sind diodengepumpt und erzeugen intensive, brillante Pulse. Sie eignen sich ideal für Anwendungen wie Materialablation, LIDAR, Fernerkundung, Massenspektrometrie, OPOs, Ti:Saphir- oder Farbstofflaser-Pumpen und viele mehr…
Entwickelt und hergestellt von:
Features
- Zwei Jahre Gewährleistung
- Bis zu 190 mJ Pulsenergie bei 1064 nm
- Bis zu 100 Hz Pulswiederholrate
- Kurze Pulsdauer im Bereich von 3–6 ns
- Temperaturstabilisierte Frequenzverdoppler und -verdreifacher (optional)
- Ausgangskoppler mit variabler Reflexion für strahlungsarmen Strahl
- Fernsteuerung über Tastenfeld und/oder beliebigen Controller unter beliebigem Betriebssystem via REST-API-Befehle
- Elektromechanischer Shutter (optional)
Anwendungen
- LIBS (Laserinduzierte Plasmaspektroskopie)
- Materialablation
- OPO-Pumpen
- Fernerkundung
- LIDAR (Light Detection and Ranging)
- Massenspektrometrie
- LIF (Laserinduzierte Fluoreszenz)
Anwendungen
Zerstörung für präzise Erkenntnisse
Die laserinduzierte Plasmaspektroskopie (LIBS) ist eine schnelle, zerstörungsarme Methode zur Bestimmung der Elementzusammensetzung von Materialien. Ein intensiver Laserpuls erzeugt auf der Oberfläche ein Plasma, dessen charakteristische Emission analysiert wird. LIBS eignet sich für nahezu alle Materialarten – fest, flüssig oder gasförmig – und ist besonders wertvoll für Anwendungen, bei denen eine schnelle und, ortsaufgelöste Analyse gefragt ist.
Distanz als Datenquelle
LIDAR sendet kurze Laserpulse aus, die an Partikeln, Aerosolen oder Molekülen in der Atmosphäre gestreut und von einem Teleskop detektiert werden. Aus der Laufzeit des Lichts wird die Entfernung berechnet – so entsteht ein räumliches Profil entlang des Strahls. LIDAR nutzt UV-, sichtbares oder nahinfrarotes Licht und eignet sich zur Detektion verschiedenster Materialien – auch in schwer zugänglichen Umgebungen.
Anwendungen
Wissenschafliche Veröffentlichungen
Engineering electrochemical sensors using nanosecond laser treatment of thin gold film on ITO glass
E. Stankevičius, M. Garliauskas, L. Laurinavičius, R. Trusovas, N. Tarasenko, and R. Pauliukaitė, Electrochimica Acta 297, 511-522 (2019). DOI: 10.1016/j.electacta.2018.11.197.
Direct generation of gold nanoparticles on ITO glass using a nanosecond laser is presented and the electrochemical properties of the gold modified ITO electrodes for detection of the ascorbic acid are analyzed. Gold nanoparticles were generated by nanosecond laser pulse irradiation of thin, 3–30 nm thick, gold films. It was found that diameters and the number of generated nanoparticles per unit area strongly depends on the thickness of the gold film when it is less than 10 nm. Furthermore, experiments have shown that the influence of laser processing parameters (the laser pulse energy and pulse number) to the size, the distribution and the area density of generated gold nanoparticles on ITO glass is negligible. Characterization of the electrochemical properties of the gold modified ITO electrodes by nanosecond laser showed that the fabricated electrodes could be employed in electrochemical sensing. Therefore, the demonstrated generation of gold nanoparticles on ITO by using the nanosecond laser approach opens new opportunities for the development of highly sensitive and low-cost electrochemical sensors.
Photoacoustic/Ultrasound/Optical Coherence Tomography Evaluation of Melanoma Lesion and Healthy Skin in a Swine Model
K. Kratkiewicz, R. Manwar, A. Rajabi‑Estarabadi, J. Fakhoury, J. Meiliute, S. Daveluy et al., Sensors 19 (12), 2815 (2019). DOI: 10.3390/s19122815.
The marked increase in the incidence of melanoma coupled with the rapid drop in the survival rate after metastasis has promoted the investigation into improved diagnostic methods for melanoma. High-frequency ultrasound (US), optical coherence tomography (OCT), and photoacoustic imaging (PAI) are three potential modalities that can assist a dermatologist by providing extra information beyond dermoscopic features. In this study, we imaged a swine model with spontaneous melanoma using these modalities and compared the images with images of nearby healthy skin. Histology images were used for validation.
Enhancement of Laser-Induced Breakdown Spectroscopy (LIBS) Detection Limit Using a Low-Pressure and Short-Pulse Laser-Induced Plasma Process
Z. Z. Wang, Y. Deguchi, M. Kuwahara, J. J. Yan, and J. P. Liu, Applied Spectroscopy 67 (11), 1242-1251 (2013). DOI: 10.1366/13-07131.
Laser-induced breakdown spectroscopy (LIBS) technology is an appealing technique compared with many other types of elemental analysis because of the fast response, high sensitivity, real-time, and noncontact features. One of the challenging targets of LIBS is the enhancement of the detection limit. In this study, the detection limit of gas-phase LIBS analysis has been improved by controlling the pressure and laser pulse width. In order to verify this method, low-pressure gas plasma was induced using nanosecond and picosecond lasers. The method was applied to the detection of Hg. The emission intensity ratio of the Hg atom to NO (IHg/ INO) was analyzed to evaluate the LIBS detection limit because the NO emission (interference signal) was formed during the plasma generation and cooling process of N2 and O2 in the air. It was demonstrated that the enhancement of IHg/INO arose by decreasing the pressure to a few kilopascals, and the IHg/INO of the picosecond breakdown was always much higher than that of the nanosecond breakdown at low buffer gas pressure. Enhancement of IHg/INO increased more than 10 times at 700 Pa using picosecond laser with 35 ps pulse width. The detection limit was enhanced to 0.03 ppm (parts per million). We also saw that the spectra from the center and edge parts of plasma showed different features. Comparing the central spectra with the edge spectra, IHg/INO of the edge spectra was higher than that of the central spectra using the picosecond laser breakdown process.