Single linearly polarized, widely tunable Yb³⁺-doped fiber laser with alternative polarization and wavelength

Abstract

A novel single linearly polarized, widely tunable Yb 3+ -doped fiber laser with alternative two orthogonal polarization (wavelength) laser beams was proposed and demonstrated experimentally. Using a polarization beam splitting (PBS) as the separating of the two tunable laser beams in a linear Yb 3+ -doped fiber cavity, the laser generates two alternatively tunable wavelength laser. Beam 1 is from 1001.9 nm to 1083.4 nm with single linear polarization and 368 mW (at 1030.1 nm) output power. Beam 2 is from 1000.0 nm to 1082.5 nm with 395 mW (at 1018.4 nm) output power and orthogonally polarized with beam 1. In addition, the laser can also work in widely tunable two wavelengths oscillating simultaneously.

Tunable wavelength generation in the 1µm region incorporating a 16-channel arrayed waveguide grating (AWG)

“…The measurements of the tunable single-wavelength were conducted concurrently to the stability of the recommended setup. In comparison to the similar approach reported in [15][16][17], the proposal demonstrated in this paper achieved a comparable SMSR and lasing threshold using a simpler setup and less equipment for the tunable wavelength output. Furthermore, work in [15,16] employed a tunable FBG as wavelength filter, for which fabrication requires expensive equipment such as a UV laser and phase mask, in contrast to the significantly lower costs for AWG fabrication.…”

“…Despite substantial attention, few reports exist on generating tunable single wavelengths in the 1060 nm region, which is the motivation of this paper. Wavelength selective filters such as FBGs [15,16] and polarizing beam splitters have been reported as a tunable element for wavelength generation in YDF lasers (YDFLs) [17]. YDF is an attractive gain medium for fiber lasers due to its high efficiency and strong absorption; these features additionally act as justification for further study of YDFLs.…”