Optical waveguide geometry containing multi-rare earth ions for enhanced gain efficiency of thulium-doped fiber amplifier

摘要

The present invention is an optical fiber amplifier with addition of thulium ions representing the gain in the 1450 ㎚ band can consequently improve the gain characteristics at 1450 ㎚ band to prevent the phenomenon of gain saturation due to amplified spontaneous emission generated in 800 ㎚ band thulium complex rare earth ion relates to a doped optical fiber, the core comprising a thulium ion added layer therein, surrounding the core, the clad, and 800 ㎚ wavelength band generated from the thulium ions added layer for improving the amplification efficiency of the doped fiber amplifier with in order to absorb the fluorescence provides an optical fiber comprising the energy-absorbing ion added layer formed is separated from the thulium ions added layer. The energy-absorbing ion added layer is at least one of dysprosium or neodymium ion is added, located in the inner core or inner cladding positioned at a minimum distance of 20 ㎚ and thulium ions added to the energy-absorbing layer and the ion ion sheath. The present invention also provides an optical amplifier and a laser containing the above-mentioned optical fiber structure.