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 along the fiber axis using a femtosecond laser. The stress-induced birefringence was estimated to be 2.4 x 10-4 at the wavelength of 1550 nm. By adding the desired numbers of stressed rods, an in-fiber quarter waveplate was fabricated with a insertion loss of 0.19 dB. The stressinduced birefringence was further explored to fabricate in-fiber polarizers based on the polarization-dependent long-period fiber grating (LPFG) structure. A polarization extinction ratio of more than 20 dB was observed at the resonant wavelength of 1523.9 nm. The in-fiber polarization devices may be useful in optical communications and fiber optic sensing applications.


Electrical and Computer Engineering


National Science Foundation (U.S.)


The research work was supported by the National Science Foundation under the grant CMMI1360664.

Keywords and Phrases

Birefringence; Diffraction gratings; Fibers; Light polarization; Optical communication; Optical fiber fabrication; Polarization; Single mode fibers; Ultrashort pulses, Fiber-optic sensing; Long period fiber grating; Optical birefringence; Polarization devices; Polarization extinction ratio; Quarter wave-plate; Resonant wavelengths; Stress induced birefringence, Optical fiber communication

International Standard Serial Number (ISSN)


Document Type

Article - Journal

Document Version

Final Version

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© 2016 Optical Society of America, All rights reserved.

Publication Date

01 Jan 2016