PT200 series

Single Housing NIR-IR Range Tunable Picosecond Laser
  • Picosecond MHz rate NIR-IR range laser system
  • 690 to 4450 nm
  • Up to 400 mW output
  • 0.5 – 87 MHz repetition rate
  • Additional 1064/532 outputs
  • Picosecond MHz rate NIR-IR range laser system
  • 690 to 4450 nm
  • Up to 400 mW output
  • 0.5 – 87 MHz repetition rate
  • Additional 1064/532 outputs

Features & Applications


  • 690 – 4450 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 4450 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.

Available models

PT2590.5 MHz pulse repetition rate, >25 mW power at 800 nm, 7 ps pulse duration
PT25787 MHz pulse repetition rate, >400 mW power at 800 nm, <7 ps pulse duration
PT27787 MHz pulse repetition rate, nearly Fourier transform limited (<0.3 cm⁻¹) linewidth, 70 ps pulse duration


Model PT259PT257PT277
OPO/OPG specifications 1)
Pulse repetition rate 2)0.5 MHz87 MHz87 MHz
Tuning range
    Signal 700 – 1000 nm 3) 690 – 1000 nm1550 – 2020 nm
    Idler 1150 – 2200 nm2250 – 4450 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< 7 ps70 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 mm2 mm
Typical beam divergence 5) 9) < 2 mrad
M2 < 2 10) < 2 10)-
Pump laser 11)
Pump wavelength 532 nm532 nm1064 nm
Max. pump power 12) 0.45 W3 W 5 W
Pulse repetition rate0.5 MHz87 MHz87 MHz
Pulse duration 13)< 10 ps 80 – 100 ps
Beam quality Gaussian > 90 % fit
Beam divergence 9) < 2 mrad
Physical characteristics
Unit size (W×L×H)455×1220×260 mm330×735×175 mm455×1220×260 mm
Power supply size (W×L×H)365×395×290 mm555×525×530 mm
Umbilical length2 m
Operating requirements
Room temperature22 ± 2 °C
Relative humidity 20 – 80 % (noncondensing)
Power requirements100 – 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.

Performance & Drawings

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