Short and long term frequency stability of linear monolithic intra-cavity frequency-doubled solid-state laser

Abstract

Single longitudinal mode visible DPSS are more and more used in devices where performance can be affected by short term (minutes) frequency drifts and hops. Long exposure holography and Raman spectrometry are applications requiring high frequency stability. Resonant external cavity frequency doubling (to generate CW deep UV) and pumping doubly resonant OPOs may be even more demanding applications in terms of frequency stability. Mechanical vibrations and thermal fluctuations are usual sources of short term frequency variations or instabilities. Monolithic ring cavities (such as NPRO) are known to solve this problem but they are quite expensive to manufacture. We will show that much simpler linear monolithic cavities used in our standard product line (SLIM-532, SLIM-550, SLIM-561 and SLIM-660) present best of class frequency stabilities compatible with the most demanding applications …