All Optical Fiber Polarization Controlling Devices Fabricated by Femtosecond Laser Irradiation
Abstract
This paper reports the stress-induced birefringence generated in an optical fiber using femtosecond laser (fs) irradiations and the fabrication of in-fiber waveplates and polarizers. Optical birefringence was created in a single-mode fiber by introducing a series of symmetric cuboid stress rods on both sides of the fiber core and along the fiber axis using a femtosecond laser. The stress-induced birefringence was estimated to be 2.4x10-4 at the optical wavelength of 1550 nm. By controlling the length of the stress rods, waveplates of t+K2he desired retardance can be fabricated. The stress-induced birefringence was further explored to fabricate in-fiber polarizers based on the polarization-dependent long-period fiber grating (LPFG) structure. For the in-fiber polarizer based on low order mode LPFG, a polarization extinction ratio of more than 25 dB was observed at the wavelength of 1527.8 nm. A high order mode LPFG based in-fiber polarizer, with a broad bandwidth of 100 nm near 1550 nm, was investigated as well. The in-fiber polarization devices with low insertion loss may be useful in optical communications and fiber optic sensing applications.
Recommended Citation
L. Yuan et al., "All Optical Fiber Polarization Controlling Devices Fabricated by Femtosecond Laser Irradiation," Proceedings of SPIE, Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XVI, vol. 9740, SPIE, Feb 2016.
The definitive version is available at https://doi.org/10.1117/12.2211744
Meeting Name
SPIE LASE (2016: Feb. 15-18, San Francisco, CA)
Department(s)
Electrical and Computer Engineering
Keywords and Phrases
Birefringence; Diffraction gratings; Fabrication; Fibers; Irradiation; Optical communication; Optical fiber fabrication; Optical fibers; Optical instruments; Polarization; Single mode fibers; Ultrashort pulses, Fiber-optic sensing; In-fiber; Long period fiber grating; Optical birefringence; Polarization devices; Polarization extinction ratio; Stress induced birefringence; Waveplates; Optical fiber communication; Femtosecond laser irradiation; In-fiber polarizer; Stress-induced birefringence
International Standard Book Number (ISBN)
978-1628419757
International Standard Serial Number (ISSN)
0277-786X; 1996-756X
Document Type
Article - Conference proceedings
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2016 SPIE, All rights reserved.
Publication Date
01 Feb 2016
