A Tunable and Switchable Multi-Wavelength Erbium-Doped Fiber Laser Based on a Curvature Mach–Zehnder Interferometer Filter Using Thin-Core Fiber by Christian Perezcampos-Mayoral, Jaime Gutiérrez-Gutiérrez, José Luis Cano-Pérez, Marciano Vargas-Treviño, Lorenzo Tepech-Carrillo, Erick Israel Guerra-Hernández, Itandehui Belem Gallegos-Velasco, Pedro Antonio Hernández-Cruz, Eeduardo Pérez-Campos-Mayoral, Victor Hugo Ojeda-Meixueiro, Julián Moisés Estudillo-Ayala, Juan Manuel Sierra-Hernandez, Roberto Rojas-Laguna

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