Acoustic-optic Q-switched cavityless weak-feedback laser based on Nd:GdVO4 bounce geometry

TL;DR

This paper demonstrates a novel cavityless weak-feedback laser using Nd:GdVO4 with high repetition rate and short pulses, supported by a new theoretical model validated through experiments and simulations.

Contribution

It introduces the first theory for Q-switched cavityless weak-feedback lasers, enabling analysis of short pulses near the round-trip time, and validates it with experimental and simulation results.

Findings

Repetition rate up to 500 kHz achieved

Pulse width of 5.2 ns at 100 kHz

Theory accurately predicts experimental outcomes

Abstract

An AOQ (acoustic-optic Q-switched) laser with cavityless weak-feedback configuration is demonstrated based on a Nd:GdVO4 bounce geometry. The laser can operate at a repetition up to 500 kHz with the output power above 4W. The pulse-width at 100 kHz reaches 5.2 ns, which is 4.3 times the round-trip time. A theory of Q-switched cavityless weak-feedback laser is proposed for the first time, to our best knowledge. This theory is very suitable for analyzing short pulses comparable to round-trip time. By utilizing the theory, simulation is implemented for our experimental conditions. The consistence between the simulation and the experimental results proves the validity of our theory.