Scalable erbium-doped waveguide amplifier with external fiber-to-fiber gain using reactively sputtered polycrystalline aluminium oxide
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We demonstrate reactively sputtered polycrystalline Al2O3:Er3+ waveguide amplifiers exhibiting external fiber-to-fiber net gain, broadband amplification, and low noise figure. With an erbium concentration of 1.5 × 1020 ions/cm3, a 30 cm amplifier length, and ... ...
