Abstract
The performance of Cr:forsterite amplifiers is reported for the first time. Small signal gain, temporal response, amplified spontaneous emission (ASE) and polarisation anisotropy are analysed with a 1300nm CW signal. Peak gain cross sections and spontaneous emission and effective lifetimes are determined. Chromium ion concentration and passive internal loss are found to play an important role. Results indicate that increased Cr4+ dopant level leads to lower gain and lower ASE noise.
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