Dual-wavelength mode-locked Er-doped fiber laser in a spectral filter free cavity. (October 2021)

• Record Type: Journal Article
• Authors: Armas-Rivera, I.; Rodriguez-Morales, L.A.; Durán-Sánchez, M.; Ibarra-Escamilla, B.
• Is Part Of: Optics & laser technology. Volume 142(2021)
• Publication Date: 2021-10
• Subjects: Mode-locked fiber laser -- Nonlinear polarization rotation -- Dual-wavelength; Optics -- Periodicals; Lasers -- Periodicals; Electronic journals; 621.366
• DOI: 10.1016/j.optlastec.2021.107222
• Languages: English
• ISSNs: 0030-3992

Abstract

Highlights: A dual-wavelength passive mode-locked in a spectral filter free cavity with NPR is presented. The dual-wavelength is obtained by decreasing linear and circular birefringence in the cavity by twisting the fiber. The double-twist fiber allows to eliminate the spectral dependence of the saturable absorber. Abstract: We present the experimental investigation of a dual-wavelength passively mode-locked Er-doped fiber laser with strict polarization control. The configuration includes a double-pass amplifier with a Faraday mirror and twisted fiber. We observe that including double-twist fiber cancels circular and linear birefringence and allows obtaining dual-wavelength emission varying the losses in the cavity. In contrast, results including single-twist fiber which only emits single-wavelength due to large circular birefringence.