Results 251 to 260 of about 435,557 (304)
Some of the next articles are maybe not open access.
Passive single-mode fiber depolarizer
Applied Optics, 1999We analyze and demonstrate a passive single-mode fiber depolarizer by using cascaded 2 x 2 couplers, recirculating delay lines, and a commercial laser diode. Design criteria and principles are discussed. We reduced the degree of polarization (DOP) to less than 20 dB by using ten cascaded couplers. The DOP can be reduced even further with more couplers.
P, Shen, J C, Palais
openaire +2 more sources
All-single-mode fiber resonator
Optics Letters, 1982An all-fiber-ring resonator has been constructed using a single strand of single-mode optical fiber and a directional coupler. Derivation of the resonator finesse in terms of fiber and directional coupler parameters is given. A finesse of 80 has been achieved experimentally. Applications of such a fiber-ring resonator are discussed.
L F, Stokes, M, Chodorow, H J, Shaw
openaire +2 more sources
Single-mode-fiber saturable absorber
Optics Letters, 1984Saturable absorption is performed on a signal in a single-mode fiber by allowing the evanescent field of the guided wave to interact with a saturable-absorbing dye. The evanescent field is exposed by mechanically removing a portion of the fiber cladding. The saturable material is then placed in close proximity to the fiber core.
W V, Sorin +3 more
openaire +2 more sources
Single-Mode–Multimode–Single-Mode Optical Fiber Sensing Structure With Quasi-Two-Mode Fibers
IEEE Transactions on Instrumentation and Measurement, 2018This 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 +3 more
openaire +2 more sources
Polarization mode dispersion in single-mode fibers
Optics Letters, 1978In real single-mode optical fibers, imperfections cause the two possible polarizations to propagate at different phase velocities. This birefringence leads to different group velocities. We have measured the resulting mode dispersion in short fiber lengths (0.5-2.5 m) from the depolarization of broad-bandwidth light. In a typical fiber we found 30 psec/
S C, Rashleigh, R, Ulrich
openaire +2 more sources
All Single Mode Fiber Optic Gyroscope
Optics Letters, 1981We present an optical fiber gyroscope that, for the first time, is composed completely of single-mode fiber-optic components. This system has increased simplicity and stability over previous bulk-optic designs and has the potential for very high rotation sensitivity.
R A, Bergh, H C, Lefevre, H J, Shaw
openaire +2 more sources
SPIE Proceedings, 1990
The technological aspects and researches results of single - mode fiber polarizer are described. Single - mode fiber has been polished and covered with metalic layer for undiserable polarization mode attenuation. The extinction ratio range from 10 to 28 dB was obtained at λ = 0.63 and 0.85 µm.
Leszek Jaroszewicz +3 more
openaire +1 more source
The technological aspects and researches results of single - mode fiber polarizer are described. Single - mode fiber has been polished and covered with metalic layer for undiserable polarization mode attenuation. The extinction ratio range from 10 to 28 dB was obtained at λ = 0.63 and 0.85 µm.
Leszek Jaroszewicz +3 more
openaire +1 more source
Single-mode fiber measurements
Optical Fiber Communication, 1987We review recent advances in the field of single-mode fiber measurements, pointing out the most promising developments. Although well-established techniques are already available for the most relevant parameters, there is still room for substantial improvement in terms of dynamic range, accuracy, and practicability of existing methods.
BRUNO COSTA, PIETRO DI VITA
openaire +1 more source
Single-mode-fiber birefringent filters
Optics Letters, 1980It 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.
openaire +2 more sources
Proceedings of the IEEE, 1987
A variety of optical components have been made directly from single-mode fibers. These components can be combined to construct in-line all-fiber systems such as fiber gyroscopes, fiber Raman lasers, local area networks, or coherent lightwave systems. This paper reviews the present state of passive and active single-mode fiber components.
R.H. Stolen, R.P. De Paula
openaire +1 more source
A variety of optical components have been made directly from single-mode fibers. These components can be combined to construct in-line all-fiber systems such as fiber gyroscopes, fiber Raman lasers, local area networks, or coherent lightwave systems. This paper reviews the present state of passive and active single-mode fiber components.
R.H. Stolen, R.P. De Paula
openaire +1 more source