Single frequency operation of continuous-wave high-power optically-pumped semiconductor lasers

We report on our research in power scaling OPSL around 1μm to exceed 100W per chip by combining a rigorous quantum design of an optimized MQW epitaxial structure, highly accurate and reproducible wafer growth and an efficient thermal management strategy. Recently, we have utilized these state-of-the-art optimized OPSL chips to achieve a new record single frequency output power of 15W. The highly coherent TEM₀₀ mode exhibit a M² of 1.2 with a very narrow linewidth (<;7.5MHz).