Specifications | Lidar-PRL | Lidar-NARL |
---|---|---|
Transmitter | ||
Laser source | Nd:YAG | Nd:YAG |
Model | 581C-10 (Quantal, France) | PL8020 (Continuum, USA) |
Operating wavelength (nm) | 1064, 532, and 355 | 532 |
Average energy per pulse (mJ) | 1000, 440, and 180 | 550 |
Pulse width (ns) | 7 | 7 |
Pulse repetition frequency (Hz) | 10 | 20 |
Beam width (mm) | 10 (expanded to 60) | 9 (expanded to 90) |
Beam divergence (mRad) | 0.3 | 0.45 |
Receiver | ||
Telescope type | Cassegrain | Newtonian |
Diameter (mm) | 900 | 750 |
Field of view (mRad) | 6 | 1 |
Interference filter (nm) | 1 | 1.07 |
Maximum transmission | 48 % | 48 % |
Photomultiplier tube | ||
Model | Thorn EMI, UK, A9813 | Hamamatsu, Japan, R3234-01 |
Data acquisition | ||
Software | SR430 (Stanford Research Systems), USA: Programmable | Four-channel PC-based data acquisition system operating with EG & G ORTEC MCS software |
Bin width (μs) | 640 × 10−3 | 2 |
Scan length | 1024 | 1024 |
Integration time (s) | 600 (for 6000 shots) | 250 (for 5000 shots) |