Single longitudinal mode lasers by using artificially controlled backscattering erbium doped fibers
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Pérez Herrera, Rosa Ana; Roldán Varona, Pablo; Rodríguez Cobo, Luis; López Higuera, José Miguel; López-Amo Sainz, ManuelFecha
2021-02Derechos
Attribution 4.0 International
Publicado en
IEEE Access, 2021, 9, 27428-27433
Editorial
Institute of Electrical and Electronics Engineers, Inc.
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Palabras clave
Distributed amplifier
Erbium-doped fiber amplifier
Fiber laser
Laser cavity resonator
Resumen/Abstract
In this work, we propose and experimentally demonstrate a new distributed short linear cavity fiber laser. At one of the cavity ends, fabricated by a commercial femtosecond fiber laser chirped pulse amplifier, an artificially controlled backscattering erbium doped fiber section has been connected. This distributed reflector acts also as a saturable absorber, leading to the generation of tunable and switchable single longitudinal-mode laser emissions. The distributed reflector consists of 9 micro-drilled sections of about 1cm each one and randomly spread throughout 2 meters of highly doped erbium fiber. The total length of the fiber laser is 9.5 m and the laser shows a single mode behavior at all the emitted wavelengths. Using this new kind of reflecting saturable absorber, single and multiple single-mode emissions can be obtained. The achieved laser presents a pump threshold as low as 45 mW and shows up to 8 different single-mode emission lines with an optical signal to noise ratio of 45dB.
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