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Sub-ns PHASE CONJUGATED LASERS
SBS-pulse compressed transform limited Nd:YAG / Nd:YLF lasers

TThe Geola G-MINI-B series is a family of flashlamp pumped Nd:YAG or Nd:YLF lasers producing emissions in the sub-nanosecond regime (0.8 - 0.1ns). The Lasers are based on temporal pulse compression by backward stimulated Brillouin scattering (SBS). This ensures narrow spectral linewidth, transform limited sub-ns pulses. A high quality output beam distribution is achieved by efficient Phase Conjugation using a  double-pass amplifier. Optional LabWindows based PC control of laser functions is available from touch screen panel with output energy plot.


G-Mini-B series
lasers incorporates short-cavity master oscillator (M-O), Faraday isolator (FI), pulse compressor (PC), phase conjugated amplifier (AMPL), second & third harmonic converters (SHG, THG). Optional Red Diode Pointer combined with output radiation permits easy alignment of the external optical scheme.

The lasers produce close to Gaussian near-diffraction limited radiation at a variety of energies, wavelengths and repetition rates. Design features include highly stable passive or electro-optically Q-switched linear oscillators with self-seeding and negative feedback loop. 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.

A particular pulse duration should be specified on request in the range of 1ns - 100ps. Temporal jitter of the laser pulse is StDev ±0.5ns for EO Q-switch and ± 4ms for the passive.

Fundamental lasing is at either 1064, 1053 or 1047 nm. Optional frequency convertion to the 2nd, 3rd and 4th harmonics gives accordingly: 532, 526.5, 523.5, 355, 351, 349, 266, 263, 262 nm.

Below are listed standard laser configurations. In addition to these models custom lasers are available that cover a large parameter space.




 
   

G-MINI-B series

Parameter

Output Wavelength1

1064 nm      532 nm      355nm  

Maximum Output Energy

0.1-0.5J    50-200mJ    25-100mJ  

Shot-to-Shot Energy Stability3

± 2.9 %       ± 4.5 %      ±   6.5 %

Pulse width (FWHM)

800 / 500 / 300 / 150 / 110ps

Beam Diameter (1/e2)

< 7 - 8 mm

Beam Divergence4

Near Diffraction Limit          

Repetition Rate

1 / 3 / 5 / 10 Hz

Spatial profile

Near Gaussian

Laser Head Size

860 x 370 x 220 mm3

Resonator Base Plate

Al-alloy, 3-point suspension

Q-switching

Passive or EO

Flash Tube Lifetime

>20 x 106  shots

Advised Operating Temperature

19 - 21 °C

Advised Operating Humidity

< 70 % non-condensing

Powering

220 V, 1 phase

Warranty Period

12 months

 
 

1Upon request other wavelengths are available:

 064 nm, 532 nm, 355 nm, 266 nm

 047 nm, 523.5 nm, 349 nm, 262 nm

2Output Energy indicated for 5 Hz repetition rate

3StDev for 1.000 laser shots with 5 Hz repetition rate

4Gaussian factor of 0.85 or better


 

Example of Shot-to-Shot Energy
Stability Histogram

   
 

 

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