EXP-08 Diode Pumped Nd:YAG Laser

Topics

Properties of Diodelaser
Optical Pumping
Rate Equation Model
Static and Dynamic Behaviour
Laser Power
Laser Resonator
Transversal Modes
Stability Criterion
Spiking


Examples of Investigations and Measurments

Properties of the diodelaser (A)
The relative output power of the high power diodelaser as a function of the injection current and the temperature is measured. The wavelength of the diodelaser emission and its dependence on the injection current and temperature are determined in the subsequent set-up by using the well known absorption transitions of the Nd:YAG material as wavelength references.

Measurements of the fluorescence life time (B)
The initial level for the emission of the 1064 nm wavelength radiation is the 4F3/2 level with the rather high lifetime of about 230 µsec. That means that about 230 µsec pass until the intensity of spontaneous emission has decreased to 1/e of its initial value. If the Nd:YAG crystal is periodically pumped, the trace of the spontaneous emission can be represented on the screen of an simple oscilloscope.

Laser operation (C)
If the laser has been adjusted to maximum output power, the measurements of slope efficiency and threshold can be performed. The evaluation of the measured values illustrates the pump threshold and efficiency of the laser set-up.
By using a few additional modules, this basic set-up can be upgraded to €žFrequency Doubling with KTP€œ or to the €žGeneration of Short Pulses€œ. The oscillation at 1.3 µm or an active Q - switch are available as options.
 
 


Required Equipment

Cat. No.    Qty.    Description
02.0502       1       Profile rail, 500 mm, ruler
02.2126       3       Mounting plate, click 25, carrier 20
02.2202       1       Filter plate holder for 3 filters, carrier 30
02.2526       1       Target screen, click 25
02.5404       1       Laser mirror adjustment holder, right LSF
02.5406       1       Laser mirror adjustment holder, left LSF
04.0030       1       Focusing optic, triplet, f=6, NA 0.6, click 25
04.0050       1       Biconvex lens f=60, 18, click 25
04.0122       1       Coloured glass filter, RG-1000
04.0302       1       Infrared display card 0.8-1.2 µm
04.0306       1       Optic cleaning set
04.0486       1       Nd:YAG rod, LSF 650 1/2€
04.0488       1       Laser mirror SHG100
04.0490       1       Laser mirror, NIR 100
05.0210       1       DIMO 808, 450 mW, Peltier cooler, XY adjustment holder
07.0003       1       BNC connection lead, 1.5 m, set of 3
07.0102       1       Photodetector, Si PIN, in housing
07.0200       1       Laserdiode controller LDC-01
10.0080       1       EXP 08 Manual
Required Options:
19.0140       1       Dual trace oscilloscope 100 MHZ
Options:           
09.0085       1       Set for 1,3 µm operation
09.0086     1       Spatial filter, adjustable iris diaphragm, click 25