High Energy Tunable Wavelength Femtosecond Laser Systems
FEATURES
▶ Based on the novel OPCPA (Optical Parametric Chirped Pulse Amplification) technology – simple and cost-efficient operation
▶ Patented front-end design (patents no. EP2827461 and EP2924500)
▶ Hands free wavelength tuning
▶ Up to 1 kHz repetition rate
▶ Up to 50 mJ pulse energy – Excellent pulse energy stability: <1.5 % rms – Excellent long-term average power stability: <1.5 % rms over >12 hour period
▶ High contrast pulses without any additional improvement equipment
APPLICATIONS
▶ Broadband CARS and SFG
▶ Femtosecond pump-probe spectroscopy
▶ Nonlinear spectroscopy
▶ High harmonic generation
▶ Particle acceleration in plasma
The UltraFlux FF/FT 5000 laser is a 2 TW tabletop femtosecond OPCPA (Optical Parametric Chirped Pulse Amplification) based system operating at 10 Hz. Originally built for ELI‑ALPS (Extreme Light Infrastructure – Attosecond Light Pulse Source) in Hungary, this laser is now available for a wide variety of applications.
The master oscillator is a patent pending (EP2827461A2) all-in-fiber Yb fiber picosecond laser seed source with two fiber outputs. One seeds the OPCPA Front-End and another seeds the Picosecond Pump Laser (PPL). Both outputs originate from the same fiber so they are synchronized optically.This approach eliminates the need for a complex temporal synchronization system typically present in other OPCPA systems.
The Nd:YAG Picosecond Pump Laser (PPL) system is comprised of several sub-systems: diode pumped Regenerative Amplifier, diode pumped Preamplifier, two flash lamp pumped Amplifiers, and Second Harmonic Generators which convert fundamental 1064 nm wavelength to 532 nm. PPL outputs four beams at 532 nm and 10 Hz pulse repetition rate. One beam is directed to NOPCPA Front-End subsystem and others are directed to NOCPA stages.
The Front-End NOPCPA (Noncollinear Optical Parametric Chirped Pulse Amplifier) consists of several sub-systems: Picosecond Optical Parametric Amplifier (ps-OPA) amplifying oscillator output pulses, Grating Compressor compressing ps-OPA output pulses, White Light Generator (WLG) broadening the spectrum of ps-OPA output pulses and Femtosecond Non-collinear Optical Parametric Amplifier (fs‑NOPA) amplifying WLG output pulses.
The Stretcher sub-system is a Grism (diffraction gratings combined together with prisms) based pulse stretcher, which stretches output pulse from NOPCPA Front-End and Dazzler (Acousto-Optic Programmable Dispersive Filter) for high order phase compensation. Three stages of NOPCPA (Noncollinear Optical Parametric Chirped Pulse Amplifiers) are used to amplify the stretched pulse from the Stretcher up to 50 mJ.
Finally, amplified pulses are compressed down to 11 fs in the Pulse Compressor. Bulk glass compressors are combined together with chirped mirror compressors. Pulse energy after Compressor is >40 mJ.
The built-in Output Diagnostics stage ensures reliable, turn-key operation by monitoring critical parameters such as energy, duration, and beam profile.
SPECIFICATIONS 1)
Model
UltraFlux FT5010
UltraFlux FF50100-SP
MAIN SPECIFICATIONS
Max. Pulse energy
50 mJ
SH output 4)
inquire
TH output 4)
inquire
FH output 4)
inquire
Wavelength tuning range
Standard version
750 – 960 nm, tunable
750 – 960 nm, fixed at desired wavelength
SH output 4)
375 – 480 nm, tunable
375 – 480 nm, fixed at desired wavelength
TH output 4)
250 – 320 nm, tunable
250 – 320 nm, fixed at desired wavelength
FH output 4)
210 – 230 nm, tunable
210 – 230 nm, fixed at desired wavelength
Scanning steps
SH output 4)
5 nm
TH output 4)
3 nm
FH output 4)
2 nm
Pulse duration
20 – 60 fs
10 – 20 fs
Pulse repetition rate
10 Hz
100 Hz
Pulse energy stability
< 1.5 %, rms
< 2.0 %, rms
Long-term power stability
< 1.5 %, rms
Spatial mode
Super Gaussian
Top-Hat
Beam diameter (1/e²)
7 mm
20 mm
Pulse contrast 2)
≥ 10⁻⁶ : 1 (within ± 50 ps)
≥ 10⁻⁸ : 1 (in ns range)
Polarization l
Linear, horizonta
Beam pointing stability
≤50 µrad, rms
Optical to RF signal jitter 3)
< 1 ps
Footprint on optical table
1.2 × 2.0 m
1.2 × 4.8 m
1) Presented parameters are from delivered systems and can be customized to meet customer‘s requirements.
2) Pulse contrast is only limited by amplified parametric fluorescence (APF) in the temporal range of ~90 ps which covers OPCPA pump pulse duration and is better than 10⁶ : 1. APF contrast depends on OPCPA saturation level (Fig. below). Our system is ASE-free and pulse contrast value in nanosecond range is limited only by measurement device capabilities (third-order autocorrelator). There are no pre-pulses generated in the system and post-pulses are eliminated by using wedged transmission optics.
3) With -PLL option purchased.
4) With SH/TH or SH/TH/FH module.
BLOCK DIAGRAM
PERFORMANCE
BEAM PROFILE
商品属性 [波长] 210-960nm [脉宽] 10 – 20 fs [脉冲能量] 50 mJ [重复频率] 100Hz