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We propose and demonstrate a novel design of simple and compact tunable fiber laser skillfully using chromatic aberration of a lens relay and a slit-like effect of optical fiber core.
We have successfully generated a Q-switched short pulse in a Pr-doped waterproof fluoro-aluminate glass fiber using a single layer graphene as a saturable absorber. The laser pulse duration was observed to be 17.6 ns.
We have demonstrated a high power red fiber-laser with a Pr3+-doped waterproof fluoro-aluminate glass fiber. The maximum output power of the 638 nm laser beam was measured to be 1.24W.
Many researchers have developed visible laser sources for various applications including laser projectors, laser displays and medical devices. For medical devices, a red laser beam is useful for photocoagulation of bleeding sites due to its minimal absorption by hemoglobin.
We have successfully drawn rare earth (Pr and Dy) doped waterproof fluoro-aluminate glass fibers at low loss (0.1∼0.3 dB/m) and demonstrated visible laser oscillations pumped by a GaN-LD.
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