Diode-pumped environmentally stable stretched-pulse fiber laser

We present results obtained with a stretched-pulse polarization additive pulse mode-locked (P-APM) fiber laser using an environmentally stable cavity design. With 980-nm diode-pumping levels of 200-mW 1.2-nJ pulses with 50 nm of spectrum are obtained. These pulses can be externally compressed to sub-100 fs. The effects of high output coupling (>80%) and pumping configuration on output performance an d intracavity pulse dynamics are studied.