NT370 series

High Energy IR Range Tunable Lasers
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  • High energy MIR-IR OPO system
  • Ultrabroad tuning from 2500 to 18000 nm
  • Up to 13 mJ energy
  • 10/20 Hz repetition rate
  • High energy MIR-IR OPO system
  • Ultrabroad tuning from 2500 to 18000 nm
  • Up to 13 mJ energy
  • 10/20 Hz repetition rate

Features & Applications

Features

  • Hands-free, automated wavelength tuning
  • Up to 15 mJ pulse energy in mid-IR spectral range
  • Less than 10 cm⁻¹ linewidth for most of the tuning range
  • 3–5 ns pulse duration
  • 10 or 20 Hz pulse repetition rate
  • Remote control pad
  • PC control via RS232 and LabView™ drivers
  • Separate output port for 1064 nm pump beam
  • OPO pump energy monitoring
  • Replacement of the flashlamps is done without misalignment of the laser cavity

Applications

  • Infrared spectroscopy
  • Cavity ring-down spectroscopy
  • Remote sensing
  • Material processing
  • Non-linear spectroscopy
  • Other laser spectroscopy applications

Description

NT370 series tunable laser seamlessly integrates in a compact housing the nanosecond optical parametric oscillator and Nd:YAG Q-switched laser. Pumped by fundamental harmonics output the lasers provides tuning in mid- and far-infrared spectral range.

NT373-XIR model uses IR crystal based cascade OPO for tunable output in 4400 – 18000 nm range. Customized tuning ranges are available by request. The linewidth of NT373-XIR model is nearly constant across tuning range and it is less than 8 cm⁻¹.

NT377 model produces tunable output in 2500 – 4400 nm range. Pulse energy is exceeding 10 mJ for wavelengths shorter than 3600 nm, while linewidth is below 10 cm⁻¹ for the wavelengths longer than 3000 nm. Because of narrow linewidth of output radiation (typically in 6 – 10 cm⁻¹ range) the laser is suitable for many infrared spectroscopic applications, for example cavity ring-down spectroscopy, gas detection and remote sensing.

The device is controlled from the remote keypad or from PC through RS232 interface using LabView™ drivers that are supplied together with the system. The remote pad features a backlit display that is easy to read even while wearing laser safety glasses. System is designed for easy and cost-effective maintenance. Replacement of flashlamps can be done without misalignment of the laser cavity and deterioration of laser performance. OPO pump energy monitoring system helps to increase lifetime of the optical components.

Accessories and Options

OptionDescription
-AWWater-air cooling option
-2020 Hz PRR option
-HOptional 1064 nm output

Specifications

ModelNT377NT373-XIR
OPO 1)
Wavelength range2500 – 4400 nm5500 – 18000 nm 2)
Output pulse energy 3)12.5 mJ1 mJ
Linewidth 4)< 10 cm-1< 8 cm-1
Scanning step1 nm
Typical pulse duration 5)3 – 5 ns
Typical beam diameter 6)6 mm8 mm
Polarizationhorizontal
PUMP LASER 7)
Pump wavelength1064 nm
Max pump pulse energy300 mJ
Pulse duration4 – 6 ns
Beam quality"Hat-top" in near field
Beam divergence< 0.5 mrad
Pulse energy stability (StdDev)< 1 %
Pulse repetition rate10 or 20 Hz
PHYSICAL CHARACTERISTICS
Unit size (W × L × H)452 × 1020 × 270 mm
Power supply size (W × L × H)330 × 520 × 670 mm
Umbilical length 2.5 m
OPERATING REQUIREMENTS
Water consumption (max 20 °C) 8) 9)10 l/min
Room temperature 18 – 27 °C
Relative humidity20 – 80 % (non-condensing)
Power requirements 10)208 or 240 V AC, single phase 50/60 Hz
Power consumption1.5 kVA
  1. Due to continuous improvement, all specifications are subject to change without notice. Parameters marked typical are not specifications. They are indications of typical performance and will vary with each unit we manufacture. Unless stated otherwise all specifications are measured at 3000 nm for NT377 unit and at 7000 nm for NT373-XIR units and for basic system without options.
  2. Please contact Ekspla for more detailed specifications.
  3. Output is specified at wavelengths defined in note 1. See tuning curves for typical outputs at other wavelengths.
  4. Linewidth is specified at wavelengths defined in note 1. See graph below for typical linewidth at other wavelengths.
  5. Estimate, assuming that pulse duration from OPO is by approx 1 ns shorter than one from pump laser.
  6. Beam diameter is measured at the FWHM level at the output aperture and can vary depending on the pump pulse energy.
  7. Laser output will be optimized for OPO operation and specification may vary with each unit we manufacture.
  8. Air cooled power supply is available as option.
  9. For 10 Hz PRR.
  10. Should be specified when ordering.

Note: Laser must be connected to the mains electricity all the time. If there will be no mains electricity for longer that 1 hour then laser (system) needs warm up for a few hours before switching on.

Performance

Publications

Found total :
2 articles, 2 selected
Application selected :
All Applications
All Applications
Scientific Applications
Photolysis – breaking down of a chemical compound by photons

Photodissociation of Sodium Iodide Clusters Doped with Small Hydrocarbons

Related applications:  Photolysis

Authors:  N. K. Bersenkowitsch, Dr. M. Ončák, J. Heller, Dr. Ch. van der Linde, Prof. Dr. M. K. Beyer

Marine aerosols consist of a variety of compounds and play an important role in many atmospheric processes. In the present study, sodium iodide clusters with their simple isotope pattern serve as model systems for laboratory studies to investigate the role of iodide in the photochemical processing of sea‐salt aerosols. Salt clusters doped with camphor, formate and pyruvate are studied in a Fourier transform ion cyclotron resonance mass spectrometer (FT‐ICR MS) coupled to a tunable laser system in both UV and IR range. The analysis is supported by ab initio calculations of absorption spectra and energetics of dissociative channels. We provide quantitative analysis of IRMPD measurements by reconstructing one‐photon spectra and comparing them with the calculated ones. While neutral camphor is adsorbed on the cluster surface, the formate and pyruvate ions replace an iodide ion. The photodissociation spectra revealed several wavelength‐specific fragmentation pathways, including the carbon dioxide radical anion formed by photolysis of pyruvate. Camphor and pyruvate doped clusters absorb in the spectral region above 290 nm, which is relevant for tropospheric photochemistry, leading to internal conversion followed by intramolecular vibrational redistribution, which leads to decomposition of the cluster. Potential photodissociation products of pyruvate in the actinic region may be formed with a cross section of <2×10−20 cm2, determined by the experimental noise level.

Published: 2018.   Source: Chem. Eur.J. 2018, 24,12433 –12443

Infrared spectroscopy of O˙− and OH− in water clusters: evidence for fast interconversion between O˙− and OH˙OH−

Related applications:  Photolysis

Authors:  J. Lengyel, M. Ončák, A. Herburger, Ch. van der Lindea, M. K. Beyer

We present infrared multiple photon dissociation (IRMPD) spectra of (H2O)n and (H2O)nOH cluster ensembles for [n with combining macron] ≈ 8 and 47 in the range of 2400–4000 cm−1. Both hydrated ions exhibit the same spectral features, in good agreement with theoretical calculations. Decomposition of the calculated spectra shows that bands originating from H2O⋯O˙ and H2O⋯OH interactions span almost the whole spectral region of interest. Experimentally, evaporation of OH˙ is observed to a small extent, which requires interconversion of (H2O)n into (H2O)n–1OH˙OH, with subsequent H2O evaporation preferred over OH˙ evaporation. The modeling shows that (H2O)n and (H2O)n–1OH˙OH cannot be distinguished by IRMPD spectroscopy.

Published: 2017.   Source: Phys. Chem. Chem. Phys., 2017,19, 25346-25351

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