Watt-level, kHz pulsed ASE source with pulse-width close to round-trip time based on Nd:GdVO4 bounce geometry

TL;DR

This paper presents a high-power, nanosecond-pulse ASE source based on Nd:GdVO4 with pulse widths close to the round-trip time, achieving high peak power without cavity dumping.

Contribution

It introduces a novel bounce geometry ASE source with pulse widths near the round-trip time, enabling high peak power in a simple setup without cavity dumping.

Findings

Pulse widths of 2.28, 1.73, and 1.17 ns achieved

Maximum output energy of 120 μJ and peak power of 100 kW

Pulse width closely matches the cavity round-trip time

Abstract

We demonstrate a watt-level, kHz nanosecond-pulse ASE source with its pulse-width being close to its round-trip time. The ASE uses a Nd:GdVO4 high gain bounce geometry structure without an output coupler. Using an EOQ (electro-optics Q-switch) device with high extinction-ratio, the pulse-width reaches 2.28, 1.73 and 1.17 ns under three effective cavity lengths, respectively. All these pulse-widths are close to the round-trip time of the corresponding effective cavity lengths. With the pulse-width being 1.17 ns, maximum output energy of 120 {\mu}J and peak power of 100 kW are achieved. This study offers a convenient method to obtain high-peak-power short pulses, comparing with cavity-dumping method.