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Features & Applications

FEATURES

Integrates DPSS pump laser and OPO into a single housing
Hands-free no-gap wavelength tuning from 210 to 2600 nm
1000 Hz pulse repetition rate
More than 40 μJ output pulse energy in UV
Less than 5 cm⁻¹ linewidth
3 – 6 ns pulse duration
Remote control pad
PC control via USB port (RS232 is optional) and LabVIEW™ drivers
Optional separate output for the OPO pump beam (355 nm)

APPLICATIONS

Laser-induced fluorescence
Flash photolysis
Photobiology
Remote sensing
Metrology
Non-linear spectroscopy
Other laser spectroscopy applications

Description & Options

NT242 series lasers produce pulses at an unprecedented 1 kHz pulse repetition rate, tunable over a broad spectral range. Integrated into a single compact housing, the diode pumped Q-switched Nd:YAG laser and OPO offers hands‑free, no-gap tuning from 210 to 2600 nm. With its 1000 Hz repetition rate, the NT242 series laser establishes itself as a versatile tool for many laboratory applications, including laser induced fluorescence, flash photolysis, photobiology, metrology, remote sensing, etc.

NT242 series systems can be controlled from a user-friendly remote control pad or/and a computer using supplied LabVIEW™ drivers. The control pad allows easy control of all parameters and features on a backlit display that is easy to read even with laser safety eyewear. Thanks to a DPSS pump source, the laser requires little maintenance. It is cooled by a stand alone chiller, which further reduces running costs. A built‑in OPO pump energy monitor allows monitoring of pump laser performance without the use of external power meters. A standard feature includes a separate output port for the 355 nm pump beam.

ACCESSORIES AND OPTIONAL ITEMS

Option	Features
-SH	Tuning range extension in UV range (210 – 355 nm) by second harmonics generation
-SF	Tuning range extension in 300 – 405 nm range by sum-frequency generation
-SH/-SF	Tuning range extension in 210 – 405 nm range by combining second harmonics and sum-frequency generator outputs for maximum possible pulse energy
-SCU	Spectral filtering accessory for improved spectral purity of pulses
-H, -2H, -3H	1064, 532 and 355 nm output via separate port

Specifications

Model ¹⁾	NT242	NT242-SH	NT242-SF	NT242-SH/SF
OPO
Wavelength range
Signal	405 – 709 nm
Idler	710 – 2600 nm
SH and SF	—	210 – 405 nm ²⁾	300 – 405 nm ²⁾	210 – 405 nm ²⁾
Pulse energy ³⁾
OPO	450 µJ
SH and SF	—	40 µJ at 240 nm	40 µJ at 320 nm	40 µJ at 320 nm
Pulse repetition rate ⁴⁾	1000 Hz
Pulse duration ⁵⁾	3 – 6 ns
Linewidth⁶⁾	< 5 cm^-1
Scanning step
Signal	0.1 nm
Idler	1 nm
SH and SF	—	0.05 nm		—
Polarization
Signal	horizontal
Idler	vertical
SH and SF	—	vertical		-
Typical beam diameter ⁷⁾	2.5 mm
Pump laser
Pump wavelength ⁸⁾	355 nm		355 / 1064 nm
Max pump pulse energy ⁹⁾	3 mJ		3 / 1 mJ
Pulse duration ⁵⁾	6 – 8 ns at 1064 nm
Physical characteristics
Laser head size (W × L × H)	455 × 1030 × 260 mm
Power supply size (W × L × H)	365 × 395 × 290 mm
Umbilical length	2.5 m
Operating requirements
Cooling	stand-alone chiller
Room temperature	15 – 30 °C
Relative humidity	20 – 80 % (non-condensing)
Power requirements	90 – 240 VAC, single phase 50/60 Hz
Power consumption	< 1 kVA

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 450 nm.
Tuning range of 210 – 405 nm is provided by SH/SF option.
See tuning curves for typical outputs at other wavelengths.
Inquire for other pulse repetition rates.
FWHM measured with photodiode featuring 1 ns rise time and 300 MHz bandwidth oscilloscope.
Linewidth is <8 cm⁻¹ for 210 – 405 nm range.
Beam diameter is measured at 450 nm at the 1/e² level and can vary depending on the pump pulse energy.
Separate output port for the 3rd and other harmonics are optional.
The laser max pulse energy will be optimized for best OPO performance. The actual pump laser output can vary with each unit we manufacture.

Performance & Drawings

Typical output pulse energy of NT242 series tunable laser

Typical beam profiles of NT242 series lasers at 500 nm. Far field

Typical beam profiles of NT242 series lasers at 500 nm. Near field

NT242 series laser head dimensions

Ordering information

NT242 series tunable wavelength lasers ordering information