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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 335 nm to 12000 nm
Pulse repetition rates up to 10 kHz
Narrow linewidth
Hands-free tuning
6-9 ns pulse duration of pump laser
Remote control pad
PC control via USB (RS-232 is optional) and LabVIEM™ drivers

APPLICATIONS

Laser-induced fluorescence
Photolysis
IR spectroscopy
Photobiology
Remote sensing
Metrology
Gas spectroscopy
Other laser spectroscopy applications

Description

NT200 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 10 kHz (depending on model) while avoiding frequent flashlamp changes that are common when flashlamp pumped lasers are used. Most of 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.

Available models

Model	Feature
NT252	Highest pulse energy in near IR range, high efficiency second harmonic generator
NT253	Variable pulse repetition rate in 0 – 10 kHz range, 700 – 900 nm and 1300 – 2200 nm tuning range
NT273	Fixed wavelength OPO producing eye-safe output at 1572 nm
NT273-XIR	Tunable output in mid to far-IR range from 4100 nm to 12 000 nm
NT277	High pulse repetition rate OPO producing tunable output in 2500 – 4475 nm spectral range

Specifications

Model ¹⁾	NT252	NT253-10K	NT273	NT273-XIR	NT277
OPO
Wavelength range
Signal	670 – 1063 nm	700 – 900 nm	1572 nm	—	—
Idler	1064 – 2600 nm	1300 – 2200 nm	3293 nm	4500 – 12000 nm ²⁾	2500 – 4475 nm
SH or SFG	335 – 531 nm	350 – 450 nm	—	—	—
Pulse energy ³⁾
OPO	900 µJ at 800 nm	25 µJ at 800 nm	400 µJ at 1572 nm	20 µJ at 7000 nm	150 µJ at 3000 nm
SH or SFG	180 µJ at 400 nm	2 µJ at 400 nm	—	—	—
Pulse repetition rate ⁴⁾	1000 Hz	0-10 kHz	0-1000 Hz ⁵⁾	1000 Hz	1000 Hz ^{5) 6)}
Linewidth ⁷⁾	<8 cm^-1	<20 cm^-1	<3 cm^-1	<6 cm^-1	10-150 cm^{-1 8)}
Scanning step
Signal	0.1 nm		—	—	—
Idler	1 nm		—	1 nm	1 nm
SH or SFG	0.05 nm		—	—	—
Polarization
Signal	horizontal	vertical	vertical	—	—
Idler	vertical		horizontal	horizontal	vertical
SH or SFG	horizontal		—	—	—
Typical beam diameter ^{9) 10)}	2.5 mm	2.5 mm	2 mm	4 mm	4 mm
Pump laser
Pump wavelength ¹¹⁾	532 nm		1064 nm
Max pump pulse energy ¹²⁾	4.5 mJ	150 µJ	1.9 mJ	1.9 mJ	4 mJ
Pulse duration ¹³⁾	< 8 ns	< 10 ns	< 9 ns
Beam quality	fit to Gaussian > 90 %
Pulse energy stability (StdDev)	< 3 %		< 1 %
Physical characteristics
Unit size (W × L × H)	453 × 1030 × 274 mm	320 × 800 × 120 mm	305 × 820 × 270 mm	305 × 910 × 270 mm
Power supply size (W × L × H)	365 × 392 × 289 mm	472 × 461 × 289 mm	365 × 392 × 289 mm
Umbilical length	2.5 m
Operating requirements
Cooling	stand-alone chiller	air
Room temperature	15 – 30 °C
Relative humidity	20 – 80 % (non-condensing)
Power requirements	90 – 240 V AC, single phase 50/60 Hz
Power consumption	< 1 kVA	< 0.5 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 1064 nm.
Available wavelength range. Custom tuning ranges are available.
Inquire about tuning curves for typical outputs at other wavelengths.
Inquire for other pulse repetition rates. For some models up to 20 kHz PRR is possible.
500 Hz version is available for higher pulse energy.
100 kHz version is available. Please contact Ekspla for more details.
In signal range.
<10 cm⁻¹ option is available for whole tuning range.
Measured at the wavelength indicated in the “Pulse energy” specification row.
Beam diameter is measured at the 1/e² level at the laser output and can vary depending on the pump pulse energy.
Separate output port for the pump beam is standard. Output ports for other available 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.
FWHM measured with photodiode featuring 1 ns rise time and 300 MHz bandwidth oscilloscope.

Performance & Drawings

Typical output pulse energy of the NT252-SH tunable laser

Typical output pulse energy of the NT277 tunable laser

NT273 series laser head dimensions

Ordering information

Ordering information of NT200 series nanosecond tunable wavelength DPSS lasers