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PT200 series picosecond tunable lasers

PT200 series lasers integrate picosecond optical parametric oscillator and picosecond DPSS pump laser into single compact housing. Picosecond tunable lasers feature 690-3400 nm tuning range, <10 ps pulse duration, nearly Fourier transform-limited linewidth and up to 87 Mhz repetition rate. Megahertz pulse repetition rate is optimal for using photon-counting detection technique in numerous nonlinear spectroscopy and microscopy applications.


  • 690 – 3400 nm tuning range
  • Optional tuning range extension to UV
  • Nearly Fourier transform-limited linewidth
  • Nearly diffraction limited divergence
  • Up to 5 kW pulse peak power
  • Collinear output of two tunable wavelengths for CARS applications (optional)
  • Output wavelength monitoring (optional)
  • PC control via USB (RS232 is optional) and LabView™ drivers


  • CARS microscopy and spectroscopy
  • Two-photon fluorescence microscopy
  • Second harmonic generation microscopy
  • Laser induced fluorescence microscopy
  • Infrared spectroscopy

PT200 series laser systems integrate a picosecond optical parametric oscillator and DPSS pump laser into a single compact housing. Mounting the components into one frame provides a cost-effective and robust solution with improved long-term stability and reduced maintenance costs.
The MHz pulse repetition rate enables the photon-counting detection method in numerous non‑linear spectroscopy and microscopy applications.
PT257 and PT259 are targeted for CARS and two photon fluorescence applications. The tuning range of PT257 and PT259 supports Raman shift measurements in the 1000 – 4000 cm⁻¹ range. An optional second harmonic generator extends the PT259 tuning range to UV, enabling time‑resolved laser-induced fluorescence measurements. The PT277 model produces approximately 0.5 W power in mid‑IR range from 2500 to 3400 nm with nearly Fourier transform limited linewidth. Applications include infrared spectroscopy and vibrational spectroscopy on surfaces.
All models produce nearly diffraction limited divergence beams, with M² measured as <1.3 over the tuning range.
The microprocessor-controlled wavelength tuning is fully automatic. The wavelength controlling elements are mounted on precise micro‑stepping motors. The temperature of the non‑linear crystal is controlled by a precise thermocontroller with a bidirectional Peltier element, resulting in the fast tuning of crystal temperature. The lasers may be controlled from a remote keypad or via USB (RS232 is optional) interface from a personal computer using LabView™ drivers.

PT200 series available models

PT259 1 MHz pulse repetition rate, > 25 mW power at 800 nm, 7 ps pulse duration.
PT257 87 MHz pulse repetition rate, > 400 mW power at 800 nm, 3-4 ps pulse duration
PT277 87 MHz pulse repetition rate, nearly Fourier transform limited (<0.3 cm⁻¹) linewidth, 70 ps pulse duration


Specifications 1)

Model PT259 PT257 PT277
OPO/OPG specifications
Pulse repetition rate 2) 1 MHz 87 MHz 87 MHz
Tuning range
Signal 700-1000 nm3) 690-1000 nm 1550-2020 nm
Idler 1150-2200 nm 2250-3400 nm
SH (optional) 350-500 nm - -
Output power4)
OPO/OPG 5) 25 mW 400 mW 300 mW
SH 6) 1 mW - -
Linewidth 5) < 8 cm-1 < 7 cm-1 < 0.3 cm-1
Typical pulse duration 5) 7) 7 ps 3-4 ps 70 ps
Typical time bandwidth product < 0.8
Scanning step
Signal 0.1 nm
Idler 1 nm
SH 0.05 nm - -
Signal beam horizontal
Idler beam horizontal
SH vertical - -
Typical beam diameter 5) 8) 2 mm ~4.5 mm 2 mm
Typical beam divergence5) 9) < 2 mrad
M2 < 2 10) < 2 10) -
Pump laser 11)
Pump wavelength 532 nm 532 nm 1064 nm
Max. pump power12) 0.45 W 3 W 5 W
Pulse repetition rate 1 MHz 87 MHz 87 MHz
Pulse duration13) <10 ps 80-100 ps
Beam quality Gaussian > 90 % fit
Beam divergence9) < 2 mrad
Physical characteristics
Unit size (WxLxH) 455x1220x260 mm 330x735x175 mm 455x1220x260 mm
Power supply size (WxLxH) 365x395x290 mm 555x525x530 mm
Umbilical length 2 m
Operating requirements
Cooling air
Room temperature 22 ± 2 °C
Relative humidity 20-80 % (noncondensing)
Power requirements 100-240 V AC, single phase 50/60 Hz
Power consumption < 1 kVA

1) Due to continuous improvement, all specifications are subject to change without notice. Parameters marked ‘typical’ are indications of typical performance (not specifications) and will vary with each unit we manufacture. Unless stated otherwise, all specifications are measured at 1064 nm.
2) Inquire for custom pulse repetition rates.
3) Tuning range extension to 620 nm is optional.
4) Output powers are specified at selected wavelengths. See typical tuning curves for power at other wavelengths.
5) Measured at 800 nm for PT25x models, and at 1620 nm for PT277 model.
6) Measured at 400 nm.
7) Pulse duration can vary depending on wavelength and pump energy.
8) Beam diameter at the 1/e2 level and can vary depending on the pump pulse energy.
9) Full angle measured at the FWHM level.
10) Specified only for signal output.
11) Separate output port for the pump beam is standard. Output ports for other available harmonics are optional.
12) Data represents typical values. Laser output will be optimised for OPO operation and specification may vary with each unit we manufacture.
13) Measured at 1064 nm.