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# Journal of Lightwave Technology

## Filter Results

Displaying Results 1 - 25 of 43
• ### Method of lines for the analysis of dielectric waveguides

Publication Year: 1993, Page(s):2015 - 2020
Cited by:  Papers (44)
| | PDF (416 KB)

This paper is concerned with the application of the method of lines (MoL) to the analysis of general dielectric waveguides that are uniform along the direction of propagation, lossfree, and passive. Hybrid-mode dispersion curves, field and intensity distributions for integrated optical waveguides are presented View full abstract»

• ### Design and performance of a multiple element slab waveguide spectrograph for multimode fiber-optic WDM systems

Publication Year: 1993, Page(s):2009 - 2014
Cited by:  Papers (8)  |  Patents (32)
| | PDF (620 KB)

A new type of compact (<7 cm2) multiple element slab waveguide spectrograph suitable for medium resolution fiber-optic wavelength division multiplexing (WDM) applications in the 700 nm to 900 nm optical band is described. The spectrograph consists of a replicated diffraction grating formed on the convex edge of a multilayer glass-ceramic slab waveguide stack The grating design, based... View full abstract»

• ### Performance of single- and double-ring resonators using 3×3 optical-fiber coupler

Publication Year: 1993, Page(s):1998 - 2008
Cited by:  Papers (14)
| | PDF (692 KB)

This paper investigates theoretically the transmission characteristics of single- and double-ring resonators using 3×3 optical-fiber couplers. Two configurations of a 3×3 coupler are considered: configuration A, with the three fibers centered at the vertices of an equilateral triangle, and configuration B, with their centers aligned in a straight line. It is found that a ring resonator... View full abstract»

• ### Effects of drive current upon defect distribution scan features in multi-longitudinal mode semiconductor lasers

Publication Year: 1993, Page(s):2057 - 2065
Cited by:  Papers (2)  |  Patents (2)
| | PDF (776 KB)

Defect distribution (D2) scans calculated from semiconductor lasers at several values of drive current exhibit peaks associated with internal defects. The peak heights vary linearly with drive current in the regime far below threshold. Near threshold, the heights exhibit a sharp maximum at a critical current and decline at larger currents. The critical current is approximately equal to ... View full abstract»

• ### Grating-assisted nonlinear codirectional couplers

Publication Year: 1993, Page(s):1990 - 1997
Cited by:  Papers (3)  |  Patents (2)
| | PDF (672 KB)

The advantages and flexibilities of using a grating to assist in the process of all-optical codirectional switching are investigated theoretically. It is found that the phase-matching condition which is required for complete switching is power dependent. In this respect, all-optical switching can be sensitive to a small change in input power level. In addition, this power-induced resonant tuning m... View full abstract»

• ### Speed and efficiency in multiple p-i-n photodetectors

Publication Year: 1993, Page(s):2052 - 2056
| | PDF (464 KB)

We present a theoretical evaluation of the application of multiple intrinsic layers to enhancing the quantum efficiency of high-speed p-i-n photodetectors. It is shown that the use of multiple layers may lead to substantial improvements in the efficiency of detectors operating in the 20-100-GHz range, provided that the device area is reduced to limit the intrinsic capacitance and special care is t... View full abstract»

• ### Distributed single-mode fiber to single-mode planar waveguide coupler

Publication Year: 1993, Page(s):1985 - 1989
Cited by:  Papers (12)
| | PDF (356 KB)

Light transfer between a curved single-mode fiber and a single-mode planar waveguide is investigated experimentally in dependence on the refractive index and thickness of the planar waveguide and for different polishing depths. Marcuse's model is applied to treat theoretically the coupler, leading to a very good agreement with the experimental results View full abstract»

• ### Sensing with a LP01-LP02 intermodal interferometer

Publication Year: 1993, Page(s):2150 - 2156
Cited by:  Papers (26)
| | PDF (568 KB)

LP01-LP02 intermodal interference in a conventional communication optical fiber has been studied theoretically and experimentally. The visibility of the interferometer and its dependence on the detection scheme and the relative excitation efficiencies of the LP01 and LP02 modes have been theoretically considered under the assumption of a Gaussian modal d... View full abstract»

• ### Neural-processing-type optical WDM demultiplexer

Publication Year: 1993, Page(s):2130 - 2139
Cited by:  Papers (8)
| | PDF (756 KB)

A neural-processing-type optical WDM demultiplexer consisting of a multimode waveguide, a detector array, and an electrical neural network (NN) is described. This demultiplexer regenerates the original signals by recognizing the different speckle patterns of each channel with the pattern-recognition function of an NN. The demultiplexing properties can be flexibly changed, in the electrical domain,... View full abstract»

• ### Characteristics of S-shaped waveguide structures by the annealed proton exchange process in LiNbO3

Publication Year: 1993, Page(s):2044 - 2051
Cited by:  Papers (5)  |  Patents (1)
| | PDF (652 KB)

The loss of S-shaped waveguide bends in annealed proton-exchanged LiNbO3 integrated optical devices is found to be dependent on the length of thermal annealing time. The minimum transition length required in order to have losses as low as 0.2 dB is 2.0 mm for a 0.1-mm lateral offset. Intersecting waveguides based on S-shaped structures have been characterized for passive crossovers. An ... View full abstract»

• ### Long distance transmission through distributed erbium-doped fibers

Publication Year: 1993, Page(s):2105 - 2115
Cited by:  Papers (14)
| | PDF (936 KB)

High bit rate, all-optical long-distance transmission could be created through the combined use of loss-compensating gain in erbium-doped fibers and solitons. A detailed analysis of the distributed erbium-doped fiber, including the spectral-gain dependency, is combined with an optimum design of the transmission fiber and general bit-error-rate calculations. Changes in wavenumber, group velocity, a... View full abstract»

• ### Ge-laminated polarizer for 790-850-nm applications with extinction ratios larger than 50 dB and insertion losses below 0.4 dB

Publication Year: 1993, Page(s):1978 - 1984
Cited by:  Papers (4)
| | PDF (764 KB)

A laminated structure composed of alternating layers of Ge and SiO 2 (Ge-LAMIPOL) is usable as a miniaturized polarizer at 790-850 nm in fiber optic gyroscopes, for instance. However, peeling of the sputter deposited layers, due to the weak binding strength between Ge and SiO2, is a serious problem during the slicing process in preparation for assembly in the fiber. In order ... View full abstract»

• ### Improved electrooptic efficiency in guided-wave modulators

Publication Year: 1993, Page(s):2076 - 2079
Cited by:  Papers (5)
| | PDF (316 KB)

The positioning of the waveguide in the electrode gap in Xc -cut, Yc-propagating LiNbO3 Mach-Zehnder intensity modulators with coplanar waveguide electrodes is analyzed, and experimentally investigated for the first time. It is found that for electrode gaps greater than 10 μm, the gap can be further increased with little increase in the drive voltage if the posi... View full abstract»

• ### Theoretical determination of sensitivity penalty for burst mode: fiber optic receivers

Publication Year: 1993, Page(s):2145 - 2149
Cited by:  Papers (31)  |  Patents (10)
| | PDF (432 KB)

Digital burst mode fiber optic receivers are being developed that establish the threshold for determination of a received 1' or 0' based on reception of the first few received `1s.' Such receivers can provide a large dynamic range while allowing the use of a minimum burst preamble. However, a sensitivity penalty with respect to continuous mode receivers which establish an ideal threshold exists.... View full abstract»

• ### Ultra-high-speed PLL-type clock recovery circuit based on all-optical gain modulation in traveling-wave laser diode amplifier

Publication Year: 1993, Page(s):2123 - 2129
Cited by:  Papers (36)  |  Patents (24)
| | PDF (592 KB)

A new phase lock loop (PLL) is developed for very-high-speed optical timing extraction using traveling-wave laser-diode amplifier (TW-LDA) as a phase detector. The all-optical gain modulation of the TW-LDA is utilized to detect the relative phase difference between an optical signal and an optical clock The frequency response of the optical gain modulation measured with the optical heterodyne tech... View full abstract»

• ### Design of strain-free-fiber with nonuniform dopant concentration for stimulated Brillouin scattering suppression

Publication Year: 1993, Page(s):1941 - 1945
Cited by:  Papers (20)  |  Patents (10)
| | PDF (372 KB)

The loss and dispersion properties of fibers with a nonuniform dopant concentration along their length are investigated theoretically and simple equations are obtained for loss and dispersion estimation. These equations are used to discuss fiber properties and a design procedure by which to achieve SBS suppression. The loss increases by 0.02-0.03 dB/km/% and the dispersion decreases by -2.4 ps/km/... View full abstract»

• ### Polarization analysis of LP01 and LP11 intermodal interference in highly birefringent bow-tie optical fibers

Publication Year: 1993, Page(s):1925 - 1936
Cited by:  Papers (13)
| | PDF (912 KB)

A polarization analysis of bimodal highly birefringent fibers in which LP01, LP11, interference takes place is performed. The polarization state of the interference pattern is theoretically described in terms of recently proposed spatial Stokes parameters on the basis of coupled-mode equations and Jones matrix formalism. The general quasimonochromatic case is considered and d... View full abstract»

• ### Tunable liquid-crystal Fabry-Perot interferometer filter for wavelength-division multiplexing communication systems

Publication Year: 1993, Page(s):2033 - 2043
Cited by:  Papers (52)  |  Patents (20)
| | PDF (988 KB)

We explain how to obtain the bandwidth and tunable range required for wavelength-division multiplexing communication systems and how to design tunable liquid-crystal Fabry-Perot interferometer filters. The main factors determining the performance are liquid-crystal loss, mirror loss, surface roughness, and parallelism, as well as mirror reflectivity and cavity gap. Experimental results closely agr... View full abstract»

• ### Transmission of infrared laser radiation through silver-halide optical fibers during repeated plastic deformation

Publication Year: 1993, Page(s):1889 - 1894
Cited by:  Papers (6)
| | PDF (592 KB)

The infrared transmission of polycrystalline mixed silver-halide optical fibers was studied during repeated mechanical plastic bending of the fibers. Plastic bending is useful for various applications, and is not shown by other available types of fibers. The lifetime (number of cycles to failure) of the fibers was measured and characterized both optically and mechanically. Optical failure lifetime... View full abstract»

• ### Interfacial shearing stress in pull-out testing of dual-coated lightguide specimens

Publication Year: 1993, Page(s):1905 - 1913
Cited by:  Papers (2)  |  Patents (3)
| | PDF (520 KB)

A simple analytical model is developed for the evaluation of the interfacial shearing stress at the glass fiber surface in dual-coated optical fiber specimen subjected to tension. It is shown that the distribution of this stress is nonuniform and that, for the given specimen's length, its maximum value increases with a decrease in the thickness of the primary coating. The obtained results can be u... View full abstract»

• ### Bit-error-rate characterization of IM-DD ultralong-distance optical communication systems with Er-doped fiber amplifiers using a recirculating loop

Publication Year: 1993, Page(s):2100 - 2104
Cited by:  Papers (3)
| | PDF (460 KB)

The authors have evaluated the bit error-rate characteristics of the IM-DD ultralong-distance optical communication systems employing Er doped fiber amplifiers. A 2.5- and 5-Gb/s IM-DD nonreturn-to-zero signal was analyzed by recirculating-loop experiments. They used a fiber loop of four Er-doped fiber amplifiers and three spans of dispersion-shifted single-mode fibers for the experiments. A 16,00... View full abstract»

• ### Design and analysis of novel multimode optical filters in dielectric waveguide

Publication Year: 1993, Page(s):1970 - 1977
Cited by:  Papers (1)  |  Patents (3)
| | PDF (764 KB)

A new multimode filter design for wavelength multiplexing/demultiplexing applications is investigated. An asymmetric bend generates a number of higher-order modes with appropriate amplitudes from a single-mode incident wave containing two wavelengths. These modes, after travelling along a straight section of multimode waveguide, are recombined in the output Y-branch in such a way that the optical ... View full abstract»

• ### Stable single-mode erbium fiber-grating laser for digital communication

Publication Year: 1993, Page(s):2021 - 2025
Cited by:  Papers (84)  |  Patents (16)
| | PDF (384 KB)

In this paper we report the fabrication of a short, robust, single-mode Er3+ fiber-grating laser. This laser is proven by the successful outcome of a long-term bit-error-rate test at the 10-15 level in a 5- G/s fiber transmission experiment. In the process we present a new pumping geometry, the elucidation of one origin of relaxation oscillations that have plagued previous la... View full abstract»

• ### The Y-laser: a multifunctional device for optical communication systems and switching networks

Publication Year: 1993, Page(s):2066 - 2075
Cited by:  Papers (15)  |  Patents (8)
| | PDF (840 KB)

This paper gives a comprehensive review of the recent progress obtained with various operation modes of a Y-shaped all active waveguide device with three optical input/output ports, the so called Y-laser. Used as a monolithic semiconductor light source, single-mode emission with an extremely large cw tuning range of more than 50 nm is accessed. Single current step tuning spans up to 8-nm range. Se... View full abstract»

• ### Error analyses for photoelastic multimode optical fiber sensors

Publication Year: 1993, Page(s):2157 - 2165
Cited by:  Papers (2)
| | PDF (660 KB)

A detailed and systematic error analysis for photoelastic optical fiber sensors is presented. The errors introduced by the photoelastic sensing element, the quarterwave-plate, the polarization beam splitter, the optical source and the signal processing system have been evaluated quantitatively. The best arrangement of the optical components in the sensor head is indicated for the elimination of th... View full abstract»

## Aims & Scope

The Journal of Lightwave Technology is comprised of original contributions, both regular papers and letters, covering work in all aspects of optical guided-wave science, technology, and engineering. Manuscripts are solicited which report original theoretical and/or experimental results which advance the technological base of guided-wave technology. Tutorial and review papers are by invitation only. Topics of interest include the following: fiber and cable technologies, active and passive guided-wave componentry (light sources, detectors, repeaters, switches, fiber sensors, etc.); integrated optics and optoelectronics; and systems, subsystems, new applications and unique field trials. System oriented manuscripts should be concerned with systems which perform a function not previously available, out-perform previously established systems, or represent enhancements in the state of the art in general.

Full Aims & Scope

## Meet Our Editors

Editor-in-Chief
Peter J. Winzer
Alcatel-Lucent Bell Labs