NT270 series

Tunable Wavelength NIR-IR Range DPSS Lasers
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  • DPSS pump laser and OPO system
  • Tuning from 2500 to 12000 nm
  • <9 ns pulse duration
  • Narrow linewidth
  • DPSS pump laser and OPO system
  • Tuning from 2500 to 12000 nm
  • <9 ns pulse duration
  • Narrow linewidth

Features & Applications

Features

  • Integrates DPSS pump laser and OPO into single housing
  • Separate output ports for the pump laser and OPO beams
  • OPO output wavelength range from 2500 nm to 12000 nm (depending on model)
  • Narrow linewidth
  • Hands-free tuning
  • <9 ns pulse duration
  • Remote control pad
  • PC control via USB (RS-232 is optional) and LabVIEM™ drivers

Applications

  • Scanning Near-field Optical Microscopy (s-SNOM) microscopy
  • Single molecule vibrational spectroscopy
  • IR spectroscopy
  • Gas spectroscopy

Description

NT270 series tunable laser systems integrates into a single compact housing a nanosecond Optical Parametric Oscillator (OPO) and Diode-Pumped Solid–State (DPSS) Q-switched pump laser.

Diode pumping enables fast data acquisition at high pulse repetition rates up to 1 kHz while avoiding frequent flashlamp changes that are common when flashlamp pumped lasers are used. The pump lasers do not require water for cooling, thus further reducing running and maintenance costs.

All lasers feature motorized tuning across the specified tuning range. The output wavelength can be set from control pad with backlit display that is easy to read even while wearing laser safety glasses. Alternatively, the laser can be controlled also from personal computer through USB (RS-232 is optional) interface using supplied LabVIEW™ drivers.

High conversion efficiency, stable output, easy maintenance and compact size make our systems excellent choice for many applications.

NT270 series available models

ModelFeature
NT277High pulse repetition rate OPO producing tunable output in 2500 – 4475 nm spectral range
NT277-XIRTunable output from NIR to far-IR range, 2500 nm to 12 000 nm

Specifications

Model NT277NT277-XIR
OPO 1)
Wavelength range
    Idler2500 – 4475 nm2500 – 4475 nm
4500 – 12000 nm 2)
Pulse energy 3)
    Idler80 μJ at 3000 nm80 µJ at 3000 nm
20 µJ at 7000 nm
Pulse repetition rate1000 Hz
Linewidth 4) <10 cm-1 <12 cm-1
Tuning resolution 5)
    Idler1 cm⁻¹
Polarization
    Idler vertical horizontal
Typical beam diameter 6) 7)4 mm
PUMP LASER
Pump wavelength1064 nm
Max pump pulse energy 8)1.9 mJ
Pulse duration 9)<10 ns
Beam qualityfit to Gaussian >90%
Pulse energy stability (StdDev) < 0.5 %
PHYSICAL CHARACTERISTICS
Unit size (W × L × H)305 × 701 × 270 mm
Power supply size (W × L × H)365 × 395 × 290 mm
Umbilical length2.5 m
OPERATING REQUIREMENTS
Coolingair
Room temperature18 – 27 °C
Relative humidity20 – 80 % (non-condensing)
Power requirements90 – 240 V AC, single phase 50/60 Hz
Power consumption< 0.5 kVA
  1. Due to continuous improvement, all specifications are subject to change. Parameters marked typical are illustrative; 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 NT277, NT277-XIR unit and at 7000 nm for NT277-XIR units and for basic system without options.
  2. Available wavelength range. Custom tuning ranges are available.
  3. Inquire about tuning curves for typical outputs at other wavelengths.
  4. Higher energy 10 – 150 cm⁻¹ option is available for 2500 – 4475 nm tuning range.
  5. For manual input from PC. When wavelength is controlled from keypad, tuning resolution is 1 nm.
  6. Measured at the wavelength indicated in the “Pulse energy” specification row.
  7. Beam diameter is measured at the 1/e² level at the laser output and can vary depending on the pump pulse energy.
  8. The laser max pulse energy will be optimized for best OPO performance. The actual pump laser output can vary with each unit we manufacture.
  9. Measured at FWHM level with photodiode featuring 1 ns rise time and 300 MHz bandwidth oscilloscope.

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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