Power control of a low noise CW Diode-Pumped Solid-State UV laser
Oxxius UV laser power control today
Presented at CLEO Europe 2007, this paper addresses a critical operational requirement for CW DPSS UV lasers at 355 nm: stable, precise power control without introducing additional noise. In intracavity frequency-tripled architectures, output power cannot simply be adjusted by varying pump current without disrupting the nonlinear conversion dynamics — a challenge that had limited the practical usability of early DPSS UV sources in sensitive analytical instruments.
The applications driving this work — wafer inspection, micromachining, flow cytometry, and cell sorting — all require not only low-noise output but also the ability to set and hold a specific power level reproducibly over time. The techniques described here contributed directly to making Oxxius’s 355 nm laser sources instrument-ready. Today, the LBX-355 and related UV sources in the Oxxius product line incorporate these power control capabilities as standard, enabling seamless integration into OEM and research systems alike.
Abstract
Low noise CW Diode-Pumped Solid-State UV lasers are needed for many analytical applications in the semiconductor (wafer inspection, micromachining…) and biological fields (flow cytometry, cell sorting…). We have recently demonstrated that such laser sources can be obtained with Diode Pumped Solid States (DPSS) structures [1].