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We demonstrate a ~2.6 mm-diameter optical ring resonator fabricated from a 7.2 mum-thick silica fiber with a CO2 laser-fused coupling region for mechanical robustness. We experimentally obtain a Q-factor of ges25,000 at 1.55 mum.
We demonstrate an expanded k-space evanescent coupling technique for characterizing the dispersion and loss of photonic crystal waveguides (PCWG) by measuring the Fabry-Perot spectrum of a closed waveguide using a highly curved taper.
We describe a non-destructive technique to measure an optical fiber's refractive index profile with sub-mum spatial resolution over a wavelength range spanning more than one octave (from 480 to 1040 nm) in a single measurement.
By measuring the dispersion-induced periodic pulse timing variation with a wavelength-swept pulse light source and a RF spectrum analyzer, the fiber group velocity dispersion can be determined with excellent accuracy.
Newly designed measurement equipment is constructed for measuring the dynamic friction properties of indoor cable at high drawing speed in an actual wiring work. The dynamic friction coefficient depends on drawing speed and surface structure.
Relation between fiber parameters and polarization changes due to mechanical vibration was investigated experimentally. We first revealed that smaller MFD non-circularity and fiber spin reduce polarization change and that low PMD fiber is desirable.
We review performance monitoring using data of the digital equalizer of coherent receivers and show simulation and measurement results from 43 Gb/s transmission data.
A new technique to compensate power fluctuations occurring in intensity-based plastic optical fiber sensors is presented. The technique relies on the use of a dual-wavelength transmission over the fiber: two signals at two different wavelengths experience the same environmental perturbations, apart from the sensing region where only one signal is attenuated according to the sensing quantity. Therefore...
This paper analyzes requirements of measurement control for chromatic dispersion based upon GMPLS and defines an abstract control protocol applicable to both link and path measurements. The protocol's LMP application has successfully demonstrated measurement control.
We demonstrate fast retrieval(<1.5 mus) of amplitude and phase of optical frequency combs propagating over long lengths of optical fiber(> 50 km) and of user defined pulse shapes representing higher order propagation effects using dual quadrature spectral Interferometry.
Simple, continuous wave based beat length measurement technique is proposed, using statistics of the states of polarization of stimulated Brillouin scattering amplified signals. Polarization statistics are studied analytically, numerically and experimentally.
We propose a piezoelectric-polarization-controller-assisted polarization sensitive optical time domain reflectometry (P-OTDR), and have detected the birefringence distribution of single-mode fibers. An external pressure and its position is detected.
We present a bandwidth reduced BOTDR realized by using reference Brillouin scattering as a local light. Temperature distribution sensing is successfully demonstrated by compensating for the temperature variation in the reference fiber.
We report non-invasive OFDR based reflectometric measurements of the complete spin profile in short spun fiber samples. In addition, the spin homogeneity is also verified on longer distance by means of P-OTDR measurements.
We describe a fiber line testing technique for PON that uses backscattered light reflected at FBGs with several wavelengths and a TLS-OTDR. We demonstrate the ability to test 8-branched fibers individually.
We newly propose 1.65 mum pulse-OCDR with 2.6 cm high spatial resolution, which can monitor reflections from FBGs in drop section of 15 km-feeder 32-branch PON without overlaps of peaks.
Conformance testing is a critical step in ensuring the future quality of a passive optical network. A new automated test procedure couples an optical switch and a hand-held test set to enable significant labor savings.
A novel differential mode delay (DMD) measurement for a multimode fiber based on optical frequency domain reflectometry (OFDR) is proposed. We obtained high-resolution DMD value of 0.054 ps/m for a commercial MMF by our method.
We report a novel frequency-shifted interferometer for interrogating multiplexed fiber grating sensors. This cw technique is capable of distinguishing gratings even when their reflection spectra overlap, suitable for very large sensor arrays.
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