Results 261 to 270 of about 434,799 (299)

Single-mode-fiber birefringent filters

Optics Letters, 1980
It is proposed to utilize optical birefringence in single-mode fibers for construction of wavelength-dependent filters. The birefringence may be natural (a consequence of the drawing process) or induced through external stresses. In the latter case, simple variation of these stresses may be used to tune the filter transfer function.
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Single-mode-fiber ring dye laser

Optics Letters, 1985
Pulsed dye-laser operation in a single-mode fiber is demonstrated by incorporating an evanescent field amplifier into an all-fiber ring resonator. Laser threshold is obtained with 60 mW of pump power. Characteristics of the vanescent fiber amplifier are investigated as functions of pump power and dye solution index.
W V, Sorin, M H, Yu
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Single mode optical fiber sensors

1995
Single mode fibers are used for sensing when extreme sensitivity is required or when a well defined polarization of light is needed at a remote sensing point. Most sensors which use single mode fibers are of the intrinsic type (i.e. the action of the measurand on the light occurs within the fiber itself). The sensitivity advantage of single mode fibers
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Single-mode fiber splicing

Optical Fiber Communication, 1984
As shown by Marcuse,1 the fields of a single-mode fiber near cutoff are approximately Gaussian. Splice loss can, therefore, be calculated by evaluating the coupling between misaligned Gaussian beams. Based on this analysis, Nemoto and Makimoto2 derived a general equation for splice loss between nonidentical single-mode fibers with combined transverse x,
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Single-mode fiber-optical polarization rotator

Applied Optics, 1979
A birefringent single-mode optical fiber is twisted mechanically in alternating sense on successive half-wave fiber sections. This arrangement, applicable in-line to a fiber, permits continuous adjustment of the state of polarization at the fiber output.
R, Ulrich, M, Johnson
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Single-mode fiber-optic directional coupler

Applied Optics, 1982
A low-loss compact single-mode fiber optical directional coupler (SMF-ODC) is developed for use in SMF reflectometers or gyroscopes. The SMF-ODC is made of two sapphire ball lenses, a half-mirror, and two ferrules. Two fibers (endfaces are concave) are aligned parallel to each other in the ferrule. The optical and mechanical axes are tilted. Cross-talk
S, Masuda, T, Iwama
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Single-Mode Fiber Devices

Seventh Topical Meeting on Integrated and Guided-Wave Optics, 1984
Optical fibers were once thought of strictly as a transmission medium. It was expected that any processing of the optical signal would take place outside of the fiber; either by conventional electronics, or by devices based on planar integrated optics.
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Modal noise in single-mode fibers

Optics Letters, 1981
So-called single-mode fibers are generally bimodal in that they can propagate two modes with orthogonal polarizations. If both transverse offset and angular misalignment are present in a single-mode fiber connector, the loss will be mode dependent. Physical distortions of the fiber before a connector cause modal noise.
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Single-mode fiber measurements

Optical Fiber Communication, 1983
This paper will discuss the measurement of those optical performance properties that are unique to single-mode fibers; chromatic dispersion; cutoff wavelengths associated with the fundamental and higher-order modes; and mode diameter or spot size. I shall review the various techniques available for measuring these properties and emphasize those that ...
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Microdeformation losses of single-mode fibers

Applied Optics, 1984
In this paper, we consider the scattering losses of single-mode fibers that are caused by microdeformations such as microbends of the fiber axis and random fluctuations of the fiber core diameter. Since very little is known about the statistics of microdeformations of actual fibers, we assume that the autocorrelation functions of random bends and ...
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