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Absorption spectrum of 1 wt % -doped NMAG glasses. Inset: IR transmittance spectrum of 1 wt % -doped NMAG glasses.
(a) Picture of ion-exchanged -doped NMAG channel waveguide. (b) AFM image of the channel section. (c) Near-field mode pattern of the channel waveguide.
OSA spectra recorded from the output end facet of 3.15-cm-long ion-exchanged -doped NMAG glass channel waveguide. Solid curve: ASE along with amplified 1482 nm signal under 793 nm laser pumping; Dashed curve: 1482 nm signal without pumping. Inset: (a) Optical gain (◼), relative gain (●), and internal gain (▲) vs input pump power at 1482 nm signal wavelength. (b) Optical gain (◼), relative gain (●), and internal gain (▲) vs signal wavelength under the excitation of 110 mW 793 nm laser pumping.
Gain-coefficient values of -doped amplifier devices.
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