By splicing on a length of -doped silica fiber onto a diode-pumped double-clad -doped silica fiber, stable passive Q switching of the -doped silica fiber laser is demonstrated. The formation of Q-switched pulses was found to depend on both the length and the position of the -doped silica fiber that was inserted into the fiber laser cavity. For stable Q-switched pulse generation, -doped silica fiber lengths shorter than twice the absorption depth must be used. For long -doped silica fiber lengths, randomly generated pulses are observed at operating wavelengths longer than , which are attributed to intracavity pumping of the -doped silica fiber.
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