A number of users have applications that would benefit from the availability of short Q-switched pulses at very high repetition rates. The applications are diverse. They span some specific fine materials processing applications through to use of the laser as an illumination source for very high speed photography. As a result, AOT has initiated a development programme to explore the practicality of a reliable > 100kHz short pulse product based on our ACE laser technology proven at lower rep-rates.Oscillator Trials
The starting point for the work has been a Nd:YVO oscillator, similar in a number of respects to those of our SP range. The unit has been modified and adapted to allow > 100kHz operation. We have conducted a preliminary characterisation of the new oscillator in our R&D laboratory. Figure (1) below shows the recorded pulse duration as a function of repetition rate over the range 50-350kHz.
Across the rep-rate range of the trial, the temporal pulses were well formed. Figure (2) shows examples of the shapes at 100kHz, 200kHz and 300kHz. The pulses were recorded with an InGaAs diode + oscilloscope combination of ~ 1.5GHz bandwidth.