Low-repetition-rate all-polarization maintaining thulium-doped passively modelocked fiber laser

• Published in: Optics and laser technology Vol. 149; p. 107856
• Main Authors: Sánchez, L.A., Cuadrado-Laborde, C., Carrascosa, A., Díez, A., Cruz, J.L., Andrés, M.V.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.05.2022; Elsevier BV
• Subjects: Bragg gratings; Doped fibers; Erbium; Fiber laser; Fiber lasers; Lasers; Low-repetition-rate; Polarization; Polarization maintaining; Repetition; Thulium; Thulium-doped; Ytterbium; Thulium-doped; Fiber laser; Low-repetition-rate; Polarization maintaining
• ISSN: 0030-3992; 1879-2545
• DOI: 10.1016/j.optlastec.2022.107856

•Low-frequency all-fiber passively mode-locked thulium-doped laser.•Full polarization-maintaining cavity.•Transform-limited light pulses at 2.3 MHz, temporal width of 81 ps, and a 50 pm of spectral width. We have developed a passively mode-locked, all-polarization maintaining, low-repetition-rate thulium-doped fiber laser (PM TDFL) emitting at 1951 nm and pumped by an erbium-ytterbium-doped all-fiber laser at 1561 nm. The PM TDFL was developed with a 44.67 m long polarization-maintaining all-fiber resonator Fabry-Perot using a semiconductor saturable absorber mirror at one end and a highly reflective fiber Bragg grating at the other. In this way, transform-limited low-repetition-rate light pulses at 2.3 MHz were generated, with each light pulse having a temporal width of 81 ps, and a spectral width of 50 pm. We have also compared the performance of this laser with a shortened version of this cavity, 6.25 m long, emitting at 15.6 MHz.