Open AccessCompact all-fiber thermo-optic modulator based on a Michelson interferometer coated with NaNdF4 nanoparticles
Author(s) -
Yutao Bo,
Chunying Guan,
Rang Chu,
Tailei Cheng,
Xu Li,
Lu Liu,
Jing Yang,
Jinhui Shi,
Pengfei Wang,
Jun Yang,
Libo Yuan
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.419621
Subject(s) - materials science , optics , optical fiber , interferometry , refractive index , optoelectronics , graded index fiber , core (optical fiber) , fiber optic sensor , physics , composite material
We propose and investigate an all-fiber thermo-optic modulator based on a side-polished twin-core fiber (TCF) Michelson interferometer (MI) coated with NaNdF 4 nanoparticles. The MI was fabricated by tapering the splicing point between the TCF and a single mode fiber (SMF). A short suspended core fiber (SCF) is spliced to one core of the TCF to introduce a fixed optical phase difference (OPD). The side-polished core is coated with photo-thermal material NaNdF 4 . Owing to the ohmic heating of NaNdF 4 nanoparticles under 808 nm pump laser, the effective refractive index of the polished core is changed, resulting in a phase shift of the MI. The MI has a significant modulation phase shift with 2.9 π near the wavelength of 1260 nm and can obtain an optical switching with a rise (fall) time of 152 (50) ms. The proposed device will have a great application potential in optical modulators due to compact structure and strong robustness.