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We demonstrate enhanced bend insensitive fiber based on the optimized design with a trench index profile. The proposed fiber is fully satisfied with ITU-T G.657.B3 and compatible with ITU-T G.652.D. In addition, it is satisfied with the requirement for MDU and in-home wiring applications.
We propose and experimentally demonstrate an optical fiber sensor for a simultaneous measurement of strain and temperature with high sensing accuracy by combining a long-period fiber grating pair with a polarization-maintaining fiber loop mirror.
Resonant nonlinear refractive index of doped optical fiber is measured using a pair of thermally expanded core fibers. Ytterbium doped fiber was used to show the validity of our proposed method.
We will propose and experimentally demonstrate optical fiber sensor for simultaneous measurement of temperature and strain with long-period fiber grating inscribed in photonic crystal fiber combined with Sagnac loop mirror based on polarization-maintaining side-hole fiber.
Stable operation at a single- or dual-wavelength fiber laser system is proposed by using a FBG written in a dual-shaped core (DSC) fiber. The spacing between the two lasing wavelengths was 0.57 nm.
We have proposed a new kind of ultra-narrow dual-bandpass fiber Bragg gratings. Based on the proposed grating, an ultra-narrow dual-channel filter is designed. Our filter has the same bandwidth and the even strength, as well as the ultra-narrow bandwidth as small as ≪1 pm.
We have proposed a new kind of ultra-narrow dual-bandpass fiber Bragg gratings. Based on the proposed grating, an ultra-narrow dual-channel filter is designed. Our filter has the same bandwidth and the even strength, as well as the ultra-narrow bandwidth as small as ≪1 pm.
We have proposed a new kind of ultra-narrow dual-bandpass fiber Bragg gratings. Based on the proposed grating, an ultra-narrow dual-channel filter is designed. Our filter has the same bandwidth and the even strength, as well as the ultra-narrow bandwidth as small as <1 pm.
A feedback polarization maintaining fiber loop mirror is newly proposed. Narrowband transmission peaks with large effective free spectral range are achieved by intrinsic vernier effect between the traveling orthogonally polarized lights along two primary axes in the polarization maintaining fiber. The properties facilitate its application in single frequency fiber lasers.
The temperature sensitivity of modal birefringence (dB/dT) of different types of polarization-maintaining fibers with side holes was measured using Sagnac loop interferometer. The thermal expansion coefficient can be varied by controlling the amount of germanium doped in the core region. Using this method dB/dT could be made higher (~10-7/degC) than that of standard PMFs (~10-8/degC) or comparable...
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