Two Picosecond Lasers

Sub-nanosecond 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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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 ENERGY STABILITY DIAGRAM

DPSS Master Oscillator Energy Stability Of 100ps Laser (model G SUB 100)

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

SUB31 and SUB51 series passively Q-switched sub-nanosecond DPSS lasers

SUB21, SUB31 and SUB51 series passively Q-switched sub-nanosecond DPSS lasers deliver high peak powers at 100 Hz repetition rate.? Short laser cavity with the fiber pumped technology is fixed on thermo-stabilized and controlled baseplate which gives extremely stable output parameters performance. Small footprint is welcome point for integration into OEM lasers. Sub-nanosecond pulse duration of < 350 ps (SUB31) and

Different models operate with repetition rates up to 100 Hz and the average power ranges from 100 mW to 250 mW. Due to short pulse duration and high pulse energy laser delivers high peak power which is up to 2.8 MW. Optional conversion to green (532 nm) and ultraviolet (355 nm, 266 nm) is also available.

Features

  • Ultra-Compact
  • Up to 1 mJ pulse energy at 1064 nm
  • Short pulse duration
  • Variable up to 100 Hz repetition rate
  • Passively Q-Switched
  • Average Power 100 mW
  • High Peak Power
  • Guaranteed > 3 GShot lifetime
  • Other wavelengths (e.g. 1342 nm, 671 nm, 447 nm) are available

Applications

  • Nonlinear Optics
  • Laser-Induced Breakdown -Spectroscopy (LIBS)
  • Time Resolved Fluorescence Measurements
  • DNA Analysis
  • Pollution Monitoring
  • Remote sensing
  • Pulse laser seeding
  • Ignition of Gas Mixtures

SPECIFICATIONS 1)

SUB21 SUB31 SUB51
Wavelength 1064 nm
Pulse energy 1 mJ
Typical pulse duration 2) ? 250 ps
< 350 ps
< 600 ps
Pulse to pulse energy stability (RMS) 3) < 0.5 %
Power drift 4) ± 3.0 %
Pulse repetition rate 5) 1 – 100 Hz
Beam profile Bell-shaped, > 85 % fit to Gaussian
Beam divergence 6) < 4 mrad
Polarization Linear, horizontal at 1064 nm
Spectral Linewidth SLM
Beam pointing stability 7) < 40 μrad
Typical beam diameter 8) 1 mm
Jitter (RMS) 9) ? 2 μs
Dimensions
Laser head ( W×L×H) 80 × 102× 36 mm
Controller unit (W×L×H) 108 × 191 × 59 mm (OEM version)
Power adapter, typical (W×L×H) 50 × 125 × 31 mm
Operating requirements
Cooling requirements Air cooled
Ambient temperature 15 – 30 °C
Relative humidity (non-condensing) 10 – 80 %
Mains voltage 10) 90-230 VAC, single phase, 47-63 Hz
Power consumption < 10 W

1) Due to continuous improvements all specifications are subject to change. Unless stated otherwise all specifications are measured at 1064 nm.
2)?FWHM level at 1064 nm. Other pulse duration is available by request. Please inquire for detailed specifications.
3)?Averaged from 60 seconds time interval.
4)?Over 8-hour period after max 5 minutes of warm-up when ambient temperature variation is less than ±2 °C.
5) Factory-set pulse repetition rate is fixed at max repetition rate. Higher repetition rates are available, please inquire for details.
6) Full angle measured at the 1/e2 level.
7) RMS value measured from 1000 shots.
8) Beam diameter is measured 20 cm from laser output at the 1/e2 level.
9) In respect to Q-switch triggering rising edge pulse.
10) Laser can be powered from appropriate 12 VDC power source. Inquire for details.

G_MICRO
Typical beam intensity profile output at ~20 cm from SUB31 laser

Typical beam intensity profile output at ~20 cm from SUB31 laser

Typical beam intensity profile output at ~20 cm from SUB51 laser

Typical beam intensity profile output at ~20 cm from SUB51 laser

SUB330 and SUB350 single longitudinal mode Picosecond Nd:YAG Lasers

Diode Pumped High Energy single longitudinal mode Picosecond Nd:YAG Lasers

Features

  • Long life time pump diode power amplifier (up to 20Gshot) producing 50 mJ?per pulse at 1064?nm
  • 300 ps?pulse duration
  • Excellent TEM00 and stable SLM
  • Up to?100 Hz?repetition rate
  • Excellent beam pointing stability
  • Thermo stabilized second, third or fourth harmonic generator options
  • Water-cooled
  • Functional and user friendly software PC control trough USB

AIR – COOLED LASER TYPE SPECIFICATIONS 1)

SUB330А SUB550A SUB530AE SUB550AE
Wavelength 1064 nm
Pulse energy
at 1064?nm 30?mJ 50?mJ 30?mJ 50?mJ
at 532?nm 15?mJ 25?mJ 15?mJ 25?mJ
at 355?nm 7?mJ 15?mJ 7?mJ 15?mJ
at 266?nm 3?mJ 5 mJ 3?mJ 5 mJ
Pulse energy stability (RMS)
at 1064?nm < 1 %
Pulse duration (FWHM) 2) 350 / 500 ps 600 ps
Pulse duration stability 3) ± 1 %
Pulse repetition rate 4) 20 Hz
Polarization vertical, > 99 % at 1064?nm
Q-Switch Type Passive EO
Jitter (RMS) 5) ? 2 μs ? 0.5 ns
Beam profile close to Gaussian in near and far fields
Beam pointing stability (StdDev) 6) ≤ 20 μrad
Typical beam diameter (FWHM) 7) ?2 mm ?3 mm ?2 mm ?3 mm
Dimensions
Laser head size (W × L × H) 175×430×132 ±?3?mm
Preliminary electrical cabinet size
(W × L × H)
600×520×286mm 440×420×286mm 600×520×286mm 440×420×286mm
Umbilical length 2.5 m

1) Due to continuous improvements all specifications are subject to change. Unless stated otherwise all specifications are measured at 1064 nm.
2)?FWHM level at 1064 nm. Other pulse duration is available by request. Please inquire for detailed specifications.
3)?Averaged from 60 seconds time interval.
4) Factory-set pulse repetition rate is fixed at max repetition rate. Higher repetition rates are available, please inquire for details.
5) In respect to Q-switch triggering rising edge pulse.
6) RMS value measured from 1000 shots.
7) Beam diameter is measured 20 cm from laser output at the 1/e2 level.

WATER – COOLED LASER TYPE SPECIFICATIONS 1)

The water – cooled models could be also manufactured 1047nm or 1053nm.

SUB330W SUB550W SUB530WE SUB550WE
Wavelength 1064 nm
Pulse energy
at 1064?nm 30?mJ 50?mJ 30?mJ 50?mJ
at 532?nm 15?mJ 25?mJ 15?mJ 25?mJ
at 355?nm 7?mJ 15?mJ 7?mJ 15?mJ
at 266?nm 3?mJ 5 mJ 3?mJ 5 mJ
Pulse energy stability (RMS)
at 1064?nm < 1 %
Pulse duration (FWHM) 2) 350 / 500 ps 600 ps
Pulse duration stability 3) ± 1 %
Pulse repetition rate 4) 100 Hz
Polarization vertical, > 99 % at 1064?nm
Q-Switch Type Passive EO
Jitter (RMS) 5) ? 2 μs ? 0.5 ns
Beam profile close to Gaussian in near and far fields
Beam pointing stability (StdDev) 6) ≤ 20 μrad
Typical beam diameter (FWHM) 7) ?2 mm ?3 mm ?2 mm ?3 mm
Dimensions
Laser head size (W × L × H) 175×430×132 ±?3?mm
Preliminary electrical cabinet size
(W × L × H)
600×520×286mm 440×420×286mm 600×520×286mm 440×420×286mm
Umbilical length 2.5 m

1) Due to continuous improvements all specifications are subject to change. Unless stated otherwise all specifications are measured at 1064 nm.
2)?FWHM level at 1064 nm. Other pulse duration is available by request. Please inquire for detailed specifications.
3)?Averaged from 60 seconds time interval.
4) Factory-set pulse repetition rate is fixed at max repetition rate. Higher repetition rates are available, please inquire for details.
5) In respect to Q-switch triggering rising edge pulse.
6) RMS value measured from 1000 shots.
7) Beam diameter is measured 20 cm from laser output at the 1/e2 level.

SUB350 Laser head dimension

SUB350 Laser head dimension

SUB350 Laser driver dimension

SUB350 Laser driver dimension

SUB350 Laser pulse profile

SUB350 Laser pulse profile

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