PW Kuan, X Fan, X Li, D Li, K Li, L Zhang, C Yu, L Hu – Optics Letters, 2016
A highly Ho-doped single-mode lead germanate glass fiber is developed for compact ∼2 μm lasers. Over 600 mW of laser output operating at 2.04 μm is demonstrated in a 2 cm-long active fiber. The slope efficiency reaches ∼34.9% with respect to the launched 1.94 μm laser pump power. To the best of our knowledge, this is the highest laser output power demonstrated within a few centimeters of a Ho-doped fiber. This result shows that the fiber is highly promising for high-power single-frequency laser applications.
… spectral measurements. The output power was measured using a thermal detector (Thorlabs), and the spectrum was measured with optical spectrometers (StellarNet, RED-Wave NIRx; YOKOGAWA, OSA-AQ6375). Before the …
