Laser 3 4

Picosecond Lasers

Some of those our lasers are used as seeders in GSI – a heavy ion research center (Germany).
The G-Sub series is family of compact DPSS or/and flash lamp pumped ND:YAG or Nd:YLF lasers producing emissions in the sub-nanosecond regime (0.5…0.1ns). Lasers are bassed on temporal pulse compression by backward stimulated Brillouin scattering (SBS). This ensures narrow spectral linewidth and transform limited sub-ns pulses. The lasers produces TEMoo near diffraction limited radiation at a variety of energies, wavelengths and repetition rates.

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Category:
picosecond-laser

The G-Sub series is family of compact DPSS or/and flash lamp pumped Nd:YAG or Nd:YLF lasers producing emissions in the sub-nanosecond regime (0.5…0.1ns). Lasers are based on temporal pulse compression by backward stimulated Brillouin scattering (SBS). This ensures narrow spectral linewidth and transform limited sub-ns pulses. The lasers produces TEM00 near diffraction limited radiation at a variety of energies, wavelengths and repetition rates. Design features include a highly stable passively or EO Q-switched oscillators and amplifiers. SuperINVAR based resonator mounting is accomplished with multi-point active temperature distribution control of laser breadboard giving output energy stability only expected with more expensive diode pumped lasers.

 TYPICAL LASER ABLATION SPOTS AND ENERGY STABILITY DIAGRAMS

DPSS Master Oscillator Energy Stability Of 100ps Laser (model G SUB 100)
Typical Laser Ablation Spots And Energy Stability Diagrams (flashalmp Pumped Version)

SYSTEM FEATURES

  • Unique cost efficient SLM Master-oscillator design based on self seeding technique;
  • New scheme of SBS-compressor allows the formation of a smooth and diffraction-limited beam by compensation of the aberration in the wavefront which are produced by the thermally stressed lasing rod. This is known as “SBS phase-conjugation”;
  • New scheme of SBS-compressor allows rejecting diffraction distortions introduced by the limited aperture of amplifier rod (appears as rings structure pattern). This is known as “SBS beam cleanup”;
  • PC control via RS232 using advanced Geola software or LabView drivers (optional);
  • Lasers are CE marked according to IEC 60825-1:2001/EN 60825-1:2001;
  • Low electrical consumption;
  • Variable pulse duration available on request.
Base model specifications G-SUB
Output Wavelength(1), nm: 1064 532 355
1053 526.5 351
1047 523.5 349
Output energy(2): 100-500 mJ 50-250 mJ 35-160 mJ
Pulse duration FWHM(3): 500 / 300 / 150 / 100 ps
Pulse duration stability at 1064 nm (Std. Dev.): ±5 %
Energy Stability (Std.Dev.)(4): ~ 1 % ~ 2 % ~ 3 %
Beam Divergence: Near Diffraction Limit for beam size
Line width: < 0.1 cm-1
Beam Diameter (1/e²): ~ 8 … 12 mm
Beam Profile(5): Top-Hat
Pulse Repetition Rate(6): 5 … 50 Hz
Beam Pointing: ~ 150 urad
Optical Pulse buildup time(7): < 100 ns
Polarization: Horizontal or Vertical, > 1:100
Q-Switching Type: Passive or E-O
Optical Pulse Jitter(8): < 10 ms for Passive Q-Switch and 0,2 ns for E-O Q-Switch
Triggering: External/Internal
Dimensions
Laser Head: (L x W x H), mm ~ 860 x 350 x 180
Power & Cooling Cabinet: (L x W x H), mm ~ 600 x 550 x 550
Umbilical Length: 2,5 m
Environmental requirements
Room temperature: 22-24oC
Relative Humidity (non-condensing): < 70 %
Mains Voltage: 210…240 VAC, single phase 50/60 Hz
Power Consumption: ~ 2… 3.5 kW

(Geola Digital reserves the right to change specification without notice)

(1) The 4th harmonic is available.
(2) Automatic output energy attenuation available.
(3) Variable pulse duration available.
(4) Std.Dev., for 350 shots at 10Hz repetition rate. Laser energy stability with MO flashlamp version: 3/5/7% 1064/532/355nm respectively.
(5) Quasi-Gaussian distribution could be also assured.
(6) Other repetition rates are available.
(7) In respect to External sync pulse signal.
(8) Std.Dev., in respect to External sync pulse signal

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