kHz Repetition Rate Broadly Tunable OPA
FEATURES
▶ Picosecond pulses at 1 kHzpulse repetition rate
▶ Hands-free wavelength tuning
▶ Tuning range from 210 nm to 2300 nm
▶ Narrow linewidth <6 cm⁻¹
▶ Low divergence <2 mrad
▶ PC control using USB (RS232 is optional) and LabVIEW™ drivers
▶ Remote control via keypadAPPLICATIONS
▶ Time resolved pump-probe spectroscopy
▶ Laser-induced fluorescence
▶ Infrared spectroscopy
▶ Nonlinear spectroscopy: vibrational-SFG, surface-SH, Z-scan
▶ Other laser spectroscopy applicationsPGx03 series Optical Parametric Generators (OPG) are designed to be pumped by 1 kHz mode-locked lasers with 1 W average power. An excellent choice is the PL2210A series mode‑locked picosecond laser from EKSPLA.
The optical design is optimized to produce low divergence beams with moderate linewidth (typically 12 cm⁻¹) at approximately 15 – 20 ps pulse duration. Due to the unique broad tunability range from 210 to 2300 nm these devices are an excellent choice for many spectroscopic applications.
Upon request the optical layout can be easily modified for pumping by other mode-locked lasers with high pulse energy or longer pulse duration.Three models designed for pumping by up to the 3rd harmonic of Nd:YAG laser are available.
Microprocessor based control system provides automatic positioning of relevant components for hands free operation. Nonlinear crystals, diffraction grating and filters are rotated by ultra-precise stepper motors in the microstepping mode, with excellent reproducibility.Precise nonlinear crystal temperature stabilization ensures long-term stability of generated wavelength and output power.
For customer convenience the system can be controlled through its USB type PC interface (RS232 is optional) with LabView™ drivers or a remote control pad. Both options allow easy control of system settings.Available standard models are summarized in a table below. Please inquire for custom-built versions.
Available models
Model Features
PG403
Model has a tuning range from 410 to 2300 nm and is optimized for providing the highest pulse energy in the visible part of the spectrum. When combined with an optional Second Harmonic Generator (SHG), it offers the widest possible tuning range – from 210 to 2300 nm.
PG503
Model has a tuning range from 700 to 2200 nm and the highest pulse energy in the near-IR spectral range. PG503 is a cost- effective alternative to the narrow-band mode-locked Ti:S lasers.
SPECIFICATIONS 1)
Model
PG403 PG403-SH PG503 Output wavelength tuning range
SH
–
210 – 410 nm
–
Signal
410 – 709 nm
700 – 1000 nm
Idler
710 – 2300 nm
1150 – 2200 nm
Output pulse energy 2)
SH 3)
–
10 µJ
–
Signal
50 µJ
70 µJ
Idler 4)
15 µJ
25 µJ
Pulse repetition rate
1000 Hz
Linewidth
< 12 cm-1
< 12 cm-1
Typical pulse duration 5)
15 ps
20 ps
Scanning step
SH
–
0.05 nm
–
Signal
0.1 nm
Idler
1 nm
Typical beam size 6)
~ 3 mm
Beam divergence 7)
< 2 mrad
Beam polarization 8)
SH
–
horizontal
–
Signal
horizontal
Idler
vertical
PUMP LASER REQUIREMENTS
Min pump energy 9)
at 532 nm
–
0.45 mJ
at 355 nm
0.3 mJ
–
Pulse duration 10)
30 ps
Beam size 10)
2 – 3 mm
Beam divergence
< 1 mrad
Beam profile
homogeneous, without hot spots, Gaussian fit > 90 %
Recommended pump source
PL2210A-TH
PL2210A-TH
PL2210A-SH
PHYSICAL CHARACTERISTICS
Size (W × L × H)
456 × 632 × 273 mm
456 × 820 × 273 mm
456 × 632 × 273 mm
OPERATING REQUIREMENTS
Room temperature
15 – 30 °C
Power requirements
100 – 240 V single phase, 47 – 63 Hz
Power consumption
< 120 W
1) 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 for PG403 units, at 800 nm for PG503 units and for basic system without options.
2) Pulse energies are specified at selected wavelengths. See typical tuning curves for pulse energies at other wavelengths.
3) Measured at 250 nm.
4) Measured at 1000 nm for PG40x units, 1620 nm for PG503 units.
5) Estimated assuming 30 ps at 1064 nm pump pulse. Pulse duration varies depending on wavelength and pump energy.
6) Beam diameter at the 1/e² level. Can vary depending on the pump pulse energy.
7) Full angle measured at the FWHM level.
8) Separate output ports for SH, signal and idler ranges.
9) Max pump energy is limited by available non‑linear crystal sizes.
10) Should be specified while ordering if non‑Ekspla pump laser is used.
TUNING CURVES
RECOMMENDED UNITS ARRANGEMENT ON OPTICAL TABLE
OUTLINE DRAWINGS
ORDERING INFORMATION
Note: Laser must be connected to the mains electricity all the time. If there will be no mains electricity for longer that 1 hour then laser (system) needs warm up for a few hours before switching on.