Broadband and stable linearly polarized mode converter based on polarization-maintaining fiber long-period grating

Jiang, Chen; Liu, Yunqi; Wan, Ying; Lin, Yanlv; Mou, Chengbo; Ma, Yuehui; Zhou, Kaiming

doi:10.1016/j.optlastec.2022.108159

Cited by 11 publications

(1 citation statement)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, in a PMF, the birefringence and stress-induced anisotropy of the fiber cause the two orthogonal polarization modes to travel at different phase velocities and exhibit different propagation characteristics. This unique property of PMF-based LPGs allows them to couple a pair of orthogonally polarized core fundamental modes to different orders of orthogonally polarized cladding modes [27][28][29]. Notably, these coupled orthogonally polarized modes exhibit no correlation in wavelength, enabling PMF-based LPGs to effectively function as polarizers [30].…”

Section: Polarization-dependent Helical Long-period Grating and Mode-...mentioning

confidence: 99%

All-Fiber Narrow-Bandwidth Mode-Locked Laser Based on Polarization-Dependent Helical Long-Period Grating

et al. 2023

Self Cite

View full text Add to dashboard Cite

As a crucial component of nonlinear polarization rotation (NPR) mode locking, optical fiber gratings offer advantages such as polarization modulation capability, stability, fiber compatibility, and preparation maturity, making them a vital technological foundation for achieving NPR mode locking. Here, a polarization-maintaining fiber helical long-period grating (PMF-HLPG) was designed and fabricated as a polarizer using the CO2-laser direct-write technique to realize the NPR effect. A homemade fiber Bragg grating (FBG) was also introduced into the laser system to enable a narrow-bandwidth lasing output and wavelength tunability. Based on the PMF-HLPG and FBG mentioned above, an all-fiber mode-locked laser with a spectra bandwidth of 0.15 nm was constructed to generate stable short pulses with a fundamental repetition rate of 12.7122 MHz and a pulse duration of 30.08 ps. In particular, its signal-to-noise ratio is up to 84.5 dB, showing the high stability of the laser. Further, the operating wavelength of the laser can be tuned from 1559.65 nm to 1560.29 nm via heating the FBG while maintaining its mode-locked state with stability. The results indicate that the PMF-HLPG could be used as a polarizer to meet the NPR mechanism for ultrashort pulse laser applications in optical communication, optical sensing, and biomedical imaging.

show abstract