All-fiber passively Q-switched thulium-doped fiber laser by using a holmium-doped fiber as saturable absorber

M. Durán Sánchez; R. I. Álvarez-Tamayo; B. Posada-Ramírez; J. Alaniz-Baylón; E. Bravo-Huerta; H. Santiago-Hernández; M. V. Hernández-Arriaga; Miguel Bello-Jiménez; B. Ibarra-Escamilla; E. A. Kuzin

doi:10.1117/12.2288431

26 February 2018 All-fiber passively Q-switched thulium-doped fiber laser by using a holmium-doped fiber as saturable absorber

M. Durán Sánchez, R. I. Álvarez-Tamayo, B. Posada-Ramírez, J. Alaniz-Baylón, E. Bravo-Huerta, H. Santiago-Hernández, M. V. Hernández-Arriaga, Miguel Bello-Jiménez, B. Ibarra-Escamilla, E. A. Kuzin

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Proceedings Volume 10512, Fiber Lasers XV: Technology and Systems; 105122T (2018) https://doi.org/10.1117/12.2288431
Event: SPIE LASE, 2018, San Francisco, California, United States

Abstract

We report a linear cavity all-fiber passive Q-switched thulium-doped fiber laser operating at the 2 μm wavelength range. The laser configuration is based on a thulium-doped fiber used as a gain medium and an unpumped segment of holmium-doped fiber which acts as a fiber saturable absorber. The cavity is formed by a fiber optical loop mirror and the flat end facet of the holmium-doped fiber. The fiber segments as saturable absorber is a 1-m long single mode doubleclad holmium-doped fiber. Q-switched pulses are obtained at the wavelength of 2024.5 nm with a pulse width of 1.1 μs. The pulse repetition rate increases as a linear function of the applied pump power. The maximum pulse repetition rate of 100 kHz was obtained with a pump power of 2.4 W.

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M. Durán Sánchez, R. I. Álvarez-Tamayo, B. Posada-Ramírez, J. Alaniz-Baylón, E. Bravo-Huerta, H. Santiago-Hernández, M. V. Hernández-Arriaga, Miguel Bello-Jiménez, B. Ibarra-Escamilla, and E. A. Kuzin "All-fiber passively Q-switched thulium-doped fiber laser by using a holmium-doped fiber as saturable absorber", Proc. SPIE 10512, Fiber Lasers XV: Technology and Systems, 105122T (26 February 2018); https://doi.org/10.1117/12.2288431

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KEYWORDS

Q switched lasers

Fiber lasers

Pulsed laser operation

Q switches

Q switching

Modulation

Birefringence

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