Wavelength-Spacing Adjustable Dual-Wavelength Dissipative Soliton Resonance Thulium-Doped Fiber Laser

Abstract

A dual-wavelength dissipative soliton resonance thulium-doped fiber laser based on nonlinear optical loop mirror (NOLM) has been demonstrated. In this laser, modelocking is achieved based on equivalent saturation absorption of the NOLM, while the dual-wavelength operation is attributed to the online birefringent fiber filter composed of a polarizer and a section of polarization-maintaining fiber (PMF). The wavelength spacing of dual-wavelength spectrum can be adjusted through changing the PMF length, and the central wavelengths can be tuned through rotating the polarization controllers. It is also found that at the two central wavelengths of the dual-wavelength pulse, switchable single wavelength mode-locked pulse can be generated. In addition, noise-like pulses with broadband spectra can be generated, when two kinds of mode-locking mechanisms conflict. The dualwavelength dissipative soliton resonance thulium-doped fiber laser has important potential applications in the laser detection, sensing and other fields. Its rich dynamics also provides a system platform for basic research on laser physics.

Tunable wide spacing all-fiber dual-wavelength holmium-doped fiber laser using a Lyot filter operating above 2 µm

“…The wavelength was tuned by careful adjusting of a PC. Liu et al [35] also reported a dual-wavelength dissipative soliton resonance thulium-doped fiber laser, with a nonlinear optical loop mirror implemented to the setup gives rise to soliton generation in this setup. The dual-wavelength was induced by the inclusion of a birefringent filter which consist of a polarizer and a piece of PMF.…”

L-band Wavelength-Switchable Dissipative Soliton Resonance Er-doped Fiber Laser

“…In theory, the DSR phenomenon is irrelevant to the operation wavelength. Very recently, 38 nm tuning range of DSR laser at 1 µm band [26] and switchable wavelength DSR laser at 2 µm band have been demonstrated [27]. As far as we know, EDFL generating DSR pulse with switchable wavelength in L-band has not been demonstrated.…”

Performance Investigation of Dual Wavelength Fiber Laser using different SOAs

“…In our work, we used FBGs for the generation of dual-wavelength fiber laser (DWFL). Several techniques for generating DWFL have been implemented either using a section of polarization-maintaining (PM) fiber [14], 3-stage all-fiber Lyot filter [15], two written FBGs in a photosensitive and PM erbium-doped fiber [16], a multi-segmented all-PM fiber ring laser [17], two Sagnac loop mirrors [18] and two FBGs [19]. However, from the best of our knowledge, their works did not investigate DWFL at a different type of SOAs, which was never being reported previously.…”