Abstract
A power enhancement optical cavity is a compelling means of realizing a pulsed laser with a high peak power and high repetition frequency, which is not feasible using a simple amplifier scheme. However, a precise feedback system is necessary for maintaining the narrow resonance condition of the optical cavity; this has become a major technical issue in developing such cavities. We have developed a new approach that does not require any active feedback system, by placing the cavity in the outer loop of a laser amplifier. We report on the first demonstration of a mode-locked pulse oscillation using the new system.
Highlights
A power enhancement optical cavity is a compelling means of realizing a pulsed laser with a high peak power and high repetition frequency
We provide the first demonstration of the pulse oscillation in the self-resonating enhancement cavity in this work
By adjusting the angle of the wave plates in the outer loop, the oscillation could be switched to CW operation
Summary
A power enhancement optical cavity is a compelling means of realizing a pulsed laser with a high peak power and high repetition frequency In this approach, a laser pulse train is injected into an external empty optical cavity whose resonance frequency matches the laser pulse frequency. We have been studying the X-ray and γ-ray production via laser-Compton scattering [1,2,3] using the high-peakpower laser pulse in the enhancement cavity. In this application, the photon flux is directly related to the stored laser power in the cavity. It is necessary to increase the power enhancement factor of the cavity
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