NT270 Series - Tunable, Diode-pumped Nanosecond Lasers

The diode pumped Q-switched laser and OPO system integrated into a single compact housing offer a tuning range from 2500 nm to 12 µm. The NT270 series offers a repetition rate of 1000 Hz and pulse energies up to 80 µJ. The pulse width is < 7 ns.

Description 

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
  • < 7 ns pulse duration
  • Remote control via key pad or PC

Applications

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

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

Model Feature
NT277 High pulse repetition rate OPO producing tunable output in 2500 – 4475 nm spectral range
NT277-XIR Tunable output from NIR to far-IR range, 2500 nm to 12 000 nm
Specifications 
Model 1) NT277 NT277-XIR
Wavelength range, idler 2500 – 4575 nm 2500 - 4475 nm
4500 - 12000 nm 2)
Pulse energy, idler 3) 80 µJ at 3000 nm 80 µJ at 3000 nm
20 µJ at 7000 nm
Pulse duration < 7 ns
Repetition rate 1000 Hz
Linewidth 4) < 10 cm-1 < 12 cm-1

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.

Applications 

Barwa, E. et al. (2019) Infrared Spectroscopy of Size‐Selected Hydrated Carbon Dioxide Radical Anions CO2.(H2O)n (n=2–61) in the C−O Stretch Region. Chemistry, A European Jounal, Vol. 25, No. 43

Group: Prof. M. Beyer, University of Innsbruck

Lasers: NT273 (discontinued*)

* The new model NT277-XIR combines the former models NT273 (1572 - 3293 nm) and NT273-XIR (4500 - 12000 nm).

Abstract

We investigate anionic [Co,CO2,nH2O] clusters as model systems for the electrochemical activation of CO2 by infrared multiple photon dissociation (IRMPD) spectroscopy in the range of 1250–2234 cm−1 using an FT‐ICR mass spectrometer. We show that both CO2 and H2O are activated in a significant fraction of the [Co,CO2,H2O] clusters since it dissociates by CO loss, and the IR spectrum exhibits the characteristic C−O stretching frequency. About 25 % of the ion population can be dissociated by pumping the C−O stretching mode. With the help of quantum chemical calculations, we assign the structure of this ion as Co(CO)(OH)2. However, calculations find Co(HCOO)(OH) as the global minimum, which is stable against IRMPD under the conditions of our experiment. Weak features around 1590–1730 cm−1 are most likely due to higher lying isomers of the composition Co(HOCO)(OH). Upon additional hydration, all species [Co,CO2,nH2O], n≥2, undergo IRMPD through loss of H2O molecules as a relatively weakly bound messenger. The main spectral features are the C−O stretching mode of the CO ligand around 1900 cm−1, the water bending mode mixed with the antisymmetric C−O stretching mode of the HCOO ligand around 1580–1730 cm−1, and the symmetric C−O stretching mode of the HCOO ligand around 1300 cm−1. A weak feature above 2000 cm−1 is assigned to water combination bands. The spectral assignment clearly indicates the presence of at least two distinct isomers for n ≥2.

Full Publication

 

 

Bersenkowitsch, N. et al. (2018) Photodissociation of sodium iode clusters doped with small hydrocarbons. Chemistry, A European Jounal, Vol. 24, No. 47

Group: Prof. M. Beyer, University of Innsbruck

Lasers: NT277, NT273 (discontinued*) and NT342

* The new model NT277-XIR combines the former models NT273 (1572 - 3293 nm) and NT273-XIR (4500 - 12000 nm).

Abstract

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.

Full Publication

 

Herburger,  A. et al. (2019) Infrared Spectroscopy of Size‐Selected Hydrated Carbon Dioxide Radical Anions CO2.−(H2O)n (n=2–61) in the C−O Stretch Region. Chemistry, A European Jounal, Vol. 25, No. 43

Group: Prof. M. Beyer, University of Innsbruck

Lasers: NT273 (discontinued*)

* The new model NT277-XIR combines the former models NT273 (1572 - 3293 nm) and NT273-XIR (4500 - 12000 nm).

Abstract

Understanding the intrinsic properties of the hydrated carbon dioxide radical anions CO2.−(H2O)n is relevant for electrochemical carbon dioxide functionalization. CO2.−(H2O)n (n=2–61) is investigated by using infrared action spectroscopy in the 1150–2220 cm−1 region in an ICR (ion cyclotron resonance) cell cooled to T=80 K. The spectra show an absorption band around 1280 cm−1, which is assigned to the symmetric C−O stretching vibration νs. It blueshifts with increasing cluster size, reaching the bulk value, within the experimental linewidth, for n=20. The antisymmetric C−O vibration νas is strongly coupled with the water bending mode ν2, causing a broad feature at approximately 1650 cm−1. For larger clusters, an additional broad and weak band appears above 1900 cm−1 similar to bulk water, which is assigned to a combination band of water bending and libration modes. Quantum chemical calculations provide insight into the interaction of CO2.− with the hydrogen‐bonding network.

Full Publication

 

Lengyel, J. et al. (2017) Infrared spectroscopy of O˙ and OH in water clusters: evidence for fast interconversion between O˙ and OH˙OH. Physical Chemistry Chemical Physics. Vol. 19, No. 37

Group: Prof. M. Beyer, University of Innsbruck

Laser: NT277

Abstract

We present infrared multiple photon dissociation (IRMPD) spectra of (H2O)n and (H2O)nOH cluster ensembles for ≈ 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.

Full Publication

Documents 
Inquiry 
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  • Description
  • Specifications
  • Pictures
  • Applications
  • Documents
  • Inquiry

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
  • < 7 ns pulse duration
  • Remote control via key pad or PC

Applications

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

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

Model Feature
NT277 High pulse repetition rate OPO producing tunable output in 2500 – 4475 nm spectral range
NT277-XIR Tunable output from NIR to far-IR range, 2500 nm to 12 000 nm
Model 1) NT277 NT277-XIR
Wavelength range, idler 2500 – 4575 nm 2500 - 4475 nm
4500 - 12000 nm 2)
Pulse energy, idler 3) 80 µJ at 3000 nm 80 µJ at 3000 nm
20 µJ at 7000 nm
Pulse duration < 7 ns
Repetition rate 1000 Hz
Linewidth 4) < 10 cm-1 < 12 cm-1

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.

Barwa, E. et al. (2019) Infrared Spectroscopy of Size‐Selected Hydrated Carbon Dioxide Radical Anions CO2.(H2O)n (n=2–61) in the C−O Stretch Region. Chemistry, A European Jounal, Vol. 25, No. 43

Group: Prof. M. Beyer, University of Innsbruck

Lasers: NT273 (discontinued*)

* The new model NT277-XIR combines the former models NT273 (1572 - 3293 nm) and NT273-XIR (4500 - 12000 nm).

Abstract

We investigate anionic [Co,CO2,nH2O] clusters as model systems for the electrochemical activation of CO2 by infrared multiple photon dissociation (IRMPD) spectroscopy in the range of 1250–2234 cm−1 using an FT‐ICR mass spectrometer. We show that both CO2 and H2O are activated in a significant fraction of the [Co,CO2,H2O] clusters since it dissociates by CO loss, and the IR spectrum exhibits the characteristic C−O stretching frequency. About 25 % of the ion population can be dissociated by pumping the C−O stretching mode. With the help of quantum chemical calculations, we assign the structure of this ion as Co(CO)(OH)2. However, calculations find Co(HCOO)(OH) as the global minimum, which is stable against IRMPD under the conditions of our experiment. Weak features around 1590–1730 cm−1 are most likely due to higher lying isomers of the composition Co(HOCO)(OH). Upon additional hydration, all species [Co,CO2,nH2O], n≥2, undergo IRMPD through loss of H2O molecules as a relatively weakly bound messenger. The main spectral features are the C−O stretching mode of the CO ligand around 1900 cm−1, the water bending mode mixed with the antisymmetric C−O stretching mode of the HCOO ligand around 1580–1730 cm−1, and the symmetric C−O stretching mode of the HCOO ligand around 1300 cm−1. A weak feature above 2000 cm−1 is assigned to water combination bands. The spectral assignment clearly indicates the presence of at least two distinct isomers for n ≥2.

Full Publication

 

 

Bersenkowitsch, N. et al. (2018) Photodissociation of sodium iode clusters doped with small hydrocarbons. Chemistry, A European Jounal, Vol. 24, No. 47

Group: Prof. M. Beyer, University of Innsbruck

Lasers: NT277, NT273 (discontinued*) and NT342

* The new model NT277-XIR combines the former models NT273 (1572 - 3293 nm) and NT273-XIR (4500 - 12000 nm).

Abstract

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.

Full Publication

 

Herburger,  A. et al. (2019) Infrared Spectroscopy of Size‐Selected Hydrated Carbon Dioxide Radical Anions CO2.−(H2O)n (n=2–61) in the C−O Stretch Region. Chemistry, A European Jounal, Vol. 25, No. 43

Group: Prof. M. Beyer, University of Innsbruck

Lasers: NT273 (discontinued*)

* The new model NT277-XIR combines the former models NT273 (1572 - 3293 nm) and NT273-XIR (4500 - 12000 nm).

Abstract

Understanding the intrinsic properties of the hydrated carbon dioxide radical anions CO2.−(H2O)n is relevant for electrochemical carbon dioxide functionalization. CO2.−(H2O)n (n=2–61) is investigated by using infrared action spectroscopy in the 1150–2220 cm−1 region in an ICR (ion cyclotron resonance) cell cooled to T=80 K. The spectra show an absorption band around 1280 cm−1, which is assigned to the symmetric C−O stretching vibration νs. It blueshifts with increasing cluster size, reaching the bulk value, within the experimental linewidth, for n=20. The antisymmetric C−O vibration νas is strongly coupled with the water bending mode ν2, causing a broad feature at approximately 1650 cm−1. For larger clusters, an additional broad and weak band appears above 1900 cm−1 similar to bulk water, which is assigned to a combination band of water bending and libration modes. Quantum chemical calculations provide insight into the interaction of CO2.− with the hydrogen‐bonding network.

Full Publication

 

Lengyel, J. et al. (2017) Infrared spectroscopy of O˙ and OH in water clusters: evidence for fast interconversion between O˙ and OH˙OH. Physical Chemistry Chemical Physics. Vol. 19, No. 37

Group: Prof. M. Beyer, University of Innsbruck

Laser: NT277

Abstract

We present infrared multiple photon dissociation (IRMPD) spectra of (H2O)n and (H2O)nOH cluster ensembles for ≈ 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.

Full Publication

Do you have questions about NT270?
Your details will be gathered and handled to respond to your request.
Detailed information on this topic can be retrieved from our privacy policy.

Do you have questions about our products?

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TOPAG Lasertechnik GmbH
Nieder-Ramstädter Str. 247
64285 Darmstadt, Germany
Phone: +49 6151 4259 78
Fax: +49 6151 4259 88
E-mail: info@topag.de