Results 271 to 280 of about 52,186 (314)

Birefringent optical filters in single-mode fiber

Optics Letters, 1981
In-line fiber-optic spectral-bandpass filters with one, two, three, and four elements are designed in analogy to the Sole filters of bulk optics by bending the fiber into the form of small coils, which are rotated to suitable angles and arranged between polarizers.
Y, Yen, R, Ulrich
openaire   +2 more sources

Single-Mode Fiber Optical Sensors

1987
Single-mode optical fibers can be used to carry coherent light in any kind of interferometric arrangement. External action on the fiber may change the phase of the light propagating through the fiber. Fiber optical sensors employ this type of interferometry, together with sophisticated opto-electronic detection, to measure different kinds of physical ...
R. Dändliker, A. Bertholds
openaire   +1 more source

Coupling starlight into single-mode fiber optics

Applied Optics, 1988
We have calculated the efficiency with which starlight can be coupled into a single-mode fiber optic that is placed in the focal plane of a telescope. The calculations are performed for a wide range of seeing conditions, with and without rapid image stabilization, and for a wide range of wavelengths. The dependence of coupling efficiency on the f-ratio
S, Shaklan, F, Roddier
openaire   +2 more sources

Single-mode fiber-optic isolator

Integrated Optics and Optical Fiber Communication, 1981
Optical isolation between the forward and back-scattered waves is essential in many optical circuits. The use of fibers as optical isolators in a fiber-optics circuit is advantageous. The present work reports on the use of single-mode fibers for optical isolation through the magnetooptic Faraday rotation of the polarization. The new method is practical
openaire   +1 more source

High-performance single-mode fiber-optic switch

Optics Letters, 1994
A piezoelectrically actuated four-port Mach-Zehnder switch with 30-micros switching time and 0.25-dB insertion loss is demonstrated at a wavelength of 1.3 microm. The worst-case cross talk is below -21 dB for an arbitrary input polarization. The process of fabricating the switch from commercial fiber couplers with length matching of the interferometer ...
S P, Fang, H F, Taylor
openaire   +2 more sources

Single-Mode–Multimode–Single-Mode Optical Fiber Sensing Structure With Quasi-Two-Mode Fibers

IEEE Transactions on Instrumentation and Measurement, 2018
This paper reviews some aspects of optical fiber sensors based on a single-mode (SM)-multimode (MM)-SM structure and reports on the realization of temperature sensors in which the MM section is made by a quasi-two mode fiber. Two different realizations are compared that rely on: 1) a bend-insensitive fiber operated in the second optical communication ...
Olivero, Massimo, Vallan, Alberto, Orta, Renato, Perrone, Guido   +3 more
openaire   +2 more sources

Single-mode fiber-optic directional couplers

Fiber and Integrated Optics, 1987
Abstract A new design of Y-type end-fused single-mode fiber directional couplers has been suggested and its optimum parameters to obtain losses of 0,5–1 dB have been determined. A technique has been developed for fabricating such couplers by electric arc fusion of single-mode fibers with thin claddings.
M. I. Belovolov, E. M. Dianov, A. V. Kuznetsov, A. M. Prokhorov   +3 more
openaire   +1 more source

Single-mode electrooptic polymer optical fiber

Organic Thin Films for Photonic Applications, 1999
We report on single mode polymer optical fiber with embedded electrodes, including polling the nonlinear core and phase modulating the light in the waveguide.
David Welker, Dennis W Garvey, C. D. Breckon, Mark G Kuzyk   +3 more
openaire   +1 more source

Single-mode optical fiber liquids analyzer

SPIE Proceedings, 2010
We propose a single-mode optical fiber sensor for characterization of physical and chemical properties of liquids. The sensor is based on monitoring changes in the back-reflected signal from the interface between the fiber end-face and the liquid sample.
Violeta A. Márquez-Cruz, Juan A. Hernández-Cordero   +1 more
openaire   +1 more source

Single-mode optical fiber antennas

SPIE Proceedings, 1990
The purpose of this paper is to calculate the radiation from bent single-code optical fibers along arbitrarily oriented curved shape, which we call 'single-mode optical fiber antennas' (SMOFA). A generalized voluie current cethod (VCM) is used in order to determine the radiated power of a N-iultiturn optical fiber antenna in the fore of circular ...
openaire   +1 more source