The APE Cavity Dumper Kit is an acoustooptical switch that is integrated in the cavity of a modelocked laser system for the reduction of the system’s pulse repetition rate. Unlike with pulse pickers the intracavity operation increases the pulse energy to a multiple of the energy that is reached by the normal modelocked pulses of the system. This makes it particularly relevant for nonlinear optical processes like SHG and THG.

The Cavity Dumper Kit consists of an acoustooptical Bragg cell to be integrated in the laser cavity and the PulseSwitch control electronics. As an option APE offers a mounting-kit for holding the Bragg cell. In parallel it provides all the necessary tools for adjusting the modulator.

Out of a seed input signal with the repetition rate of the modelocked system the control electronics generate the RF carrier frequency for the Bragg cell. An internal frequency divider allows for division rates between 1:20 and 1:5000 of the seed frequency (optional: 1:2 ... 1:260000). External triggering and therefore single pulse operation is possible, too. The phase of the RF signal is fine tuned by a phase shifter as a preposition for using the cavity dumper in double pass operation.

Fused silica is the active modulator material of the Bragg cell. Therefore the cavity dumper covers a wide wavelength range with a high optical damage threshold.

Accordingly, the APE Cavity Dumper Kit is suitable for a variety of different Ti:Sa-, Ion- and dye lasers as well as other laser systems. Please contact APE GmbH for further information on the different possibilities of application and have also a look at the APE PulseSwitch – the APE complete system cavity dumper for the Coherent Mira 900.

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Distributors	Japan: Phototechnica Corporation