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# Electronics Letters

## Filter Results

Displaying Results 1 - 25 of 55
• ### Quantitative images of large biological bodies in microwave tomography by using numerical and real data

Publication Year: 1996, Page(s):2138 - 2140
Cited by:  Papers (9)
| | PDF (715 KB)

A new inverse microwave imaging algorithm is presented which has the ability to obtain quantitative dielectric maps of large biological bodies. By using a priori information, obtained with a first order algorithm, the final image is obtained by solving the direct problem and an ill-conditioned system of equations into an iterative procedure. The algorithm has been successfully tested with real dat... View full abstract»

• ### Strong Bragg gratings for WDM devices in non-sensitised low-loss Ge-doped waveguides

Publication Year: 1996, Page(s):2151 - 2152
Cited by:  Papers (1)
| | PDF (248 KB)

Bragg gratings have been written with 193 nm UV-light through a phase mask in low-loss germanium-doped buried waveguides. Without any kind of sensitisation, reflectivities of up to 99.98% and background rejection better than 22 dB have been obtained for 20 mm long Bragg gratings View full abstract»

• ### High-sensitivity microwave power sensor for GaAs-MMIC implementation

Publication Year: 1996, Page(s):2149 - 2150
Cited by:  Papers (19)
| | PDF (240 KB)

GaAs bulk micromachining combined with MESFET technology has been applied to fabricate a thermoelectric microwave power sensor in a terminating load configuration. Its advantages are technological compatibility with MMIC processes combined with excellent performance: the sensitivity under normal ambient pressure is 2.02 V/W, inherent linearity over a dynamic range of 48 dB and a thermal time const... View full abstract»

• ### Detection of microwave radiation by electronic fluid in high electron mobility transistors

Publication Year: 1996, Page(s):2148 - 2149
Cited by:  Papers (15)
| | PDF (212 KB)

The authors present a microwave detector which utilises the nonlinear properties of 2D electronic fluid in a high electron mobility transistor (HEMT). The detector operates between 8 and 18 GHz and the measured responsivity is in good agreement with the recent theory of 2D electronic fluids View full abstract»

• ### Transmission of ATM cells over optical CDMA links

Publication Year: 1996, Page(s):2168 - 2169
Cited by:  Papers (3)
| | PDF (228 KB)

The transmission of ATM traffic over optical CDMA links using orthogonal codes is evaluated in terms of cell loss/error probability under the conditions of varying offered load with different traffic burstiness. The results have demonstrated the acceptable performance for such a system. However, the key advantage of such a system is minimal delay, asynchronous access and relative simplicity of swi... View full abstract»

• ### 60 GHz band millimetre-wave signal generation and transport over optical frequency division multiplexing networks

Publication Year: 1996, Page(s):2158 - 2159
Cited by:  Papers (14)
| | PDF (224 KB)

A novel optical generation and optical frequency division multiplexing (OFDM) transport of 60 GHz band millimetre (MM)-wave signals is proposed and experimentally demonstrated over 40 km long singlemode optical fibre. The generated MM-wave signals with the narrow linewidths of <300 Hz are obtained View full abstract»

• ### Solid state polymer dye Q-switch for Cr:LiCAF, alexandrite, and ruby lasers

Publication Year: 1996, Page(s):2146 - 2148
| | PDF (292 KB)

We report passive Q-switching of the Cr3+:LiCaAlF6 (Cr:LiCAF) laser, Cr3+:BeAl2O4 (alexandrite) laser, and Cr3+:Al2O3 (ruby) laser with a durable solid state polymer dye Q-switch: 1,1',3,3,3',3'-hexamethylindotricarbocyanine iodide (HITCI) doped organically modified silicate (ORMOSIL) saturable absorber View full abstract»

• ### Self-regulating spectral characteristics of four-channel WDM link utilising twincore erbium doped fibre amplifiers

Publication Year: 1996, Page(s):2166 - 2168
| | PDF (360 KB)

A channel power equalising WDM link using twincore EDFAs has been investigated. Non-divergent and self-regulating propagation of four wavelength channels is demonstrated in a 910 km link using 14 twincore EDFAs. The inhomogeneous properties of the gain of this new amplifier type are analysed View full abstract»

• ### 12 Gbit/s laser diode and optical modulator drivers with InP/InGaAs double HBTs

Publication Year: 1996, Page(s):2156 - 2157
Cited by:  Papers (12)  |  Patents (3)
| | PDF (236 KB)

Electronic driver circuits for semiconductor lasers, optical modulators and optical amplifier gates used in fibre optical communication have been realised with InP/InGaAs double heterojunction bipolar transistors (HBTs) with fT=73 GHz and fmax=112 GHz. Achievements combine output voltages of 3.5 V and current swings of 140 mA across 25 Ω loads with rise and fall times o... View full abstract»

• ### Bias-free 1 Gbit/s data transmission using singlemode GaAs VCSELs at λ=835 nm

Publication Year: 1996, Page(s):2145 - 2146
Cited by:  Papers (8)
| | PDF (232 KB)

Bias-free 1 Gbit/s pseudo-random data transmission using a laterally oxidised singlemode GaAs vertical-cavity surface-emitting laser is demonstrated and compared to biased modulation. A bit error-rate of 10-11 obtained -28 dBm received optical power makes these laser devices very attractive for optical interconnection View full abstract»

• ### Noise suppression effect in cascaded wavelength conversion using light-injected DFB-LDs

Publication Year: 1996, Page(s):2165 - 2166
Cited by:  Papers (1)
| | PDF (224 KB)

Cascaded wavelength conversion using optically modulated DFB-LDS is described. It is demonstrated that signal fluctuation is efficiently suppressed in two-stage conversion, since fluctuation in both on'- and off'-states was reduced through the conversion process View full abstract»

• ### 10 Gbit/s repeaterless transmission over 250 km standard fibre

Publication Year: 1996, Page(s):2155 - 2156
Cited by:  Papers (4)  |  Patents (1)
| | PDF (232 KB)

The authors demonstrate experimentally 10 Gbit/s repeaterless transmission at 1.55 μm over the record length of 250 km standard singlemode fibre using pre-distorted ASK transmission and a dispersion compensating fibre in the receiver View full abstract»

• ### 40 Gbit/s adiabatic and phase-stationary soliton transmission with sliding-frequency filter over 4000 km reciprocating dispersion-managed fibre

Publication Year: 1996, Page(s):2173 - 2174
Cited by:  Papers (5)  |  Patents (1)
| | PDF (216 KB)

A novel adiabatic and phase-stationary (APS) soliton transmission technique based on the sliding-frequency filter and reciprocating dispersion management is proposed. Utilising the proposed technique, 40 Gbit/s single-channel transmission is demonstrated over 4000 km View full abstract»

• ### Reduction of the Shupe effect in fibre optic gyros; the random-wound coil

Publication Year: 1996, Page(s):2177 - 2178
Cited by:  Papers (3)  |  Patents (9)
| | PDF (252 KB)

A method for reducing the Shupe effect in fibre-optic gyros is described, and verified experimentally. The unbalanced phase shifts in the gyro Sagnac intereferometer that are produced by a traversing temperature gradient are randomised by winding the coil in such a way as to scramble the relative positions of the turns View full abstract»

• ### Waveguide integrated 1.55 μm photodetector with 45 GHz bandwidth

Publication Year: 1996, Page(s):2143 - 2145
Cited by:  Papers (23)  |  Patents (4)
| | PDF (404 KB)

Evanescently coupled, waveguide integrated photodiodes were fabricated on InP. The device design is intended to provide ultrafast photoresponse together with a high responsivity. A 3 dB bandwidth of 45 GHz and 90% internal quantum efficiency is achieved at 1.55 μm wavelength. High-speed operation with linear power response is obtained at power levels as high as 5 mW View full abstract»

• ### Design and analysis of six port-TEM cell for generating standard electromagnetic fields

Publication Year: 1996, Page(s):2127 - 2128
Cited by:  Papers (5)
| | PDF (228 KB)

The authors report the design and analysis of a six port-TEM cell. The cell is especially useful for EMI/EMC testing since it maximises the test area with high field uniformity in the transverse section and changes the polarisation of fields easily. The measured electric fields inside the cell agree well with the calculated results View full abstract»

• ### High sensitivity 1.3 μm optically preamplified receiver using Raman amplification

Publication Year: 1996, Page(s):2164 - 2165
Cited by:  Papers (8)  |  Patents (3)
| | PDF (216 KB)

A 10 Gbit/s receiver using a Raman preamplifier with a gain of 40 dB and a noise figure of 4.4 dB exhibits a sensitivity of -36.4 dBm (151 photon/bit). The preamplifier which is counter-directionally pumped exhibits a two-stage topology to minimise double Rayleigh scattering View full abstract»

• ### Two-section electroabsorption modulator with negative chirp at low insertion loss

Publication Year: 1996, Page(s):2121 - 2122
Cited by:  Papers (3)  |  Patents (3)
| | PDF (240 KB)

A two-section electroabsorption modulator is proposed with an effective chirp parameter of -0.5 and an insertion loss of only 12.5 dB for a voltage swing of 1.2 V. These values are deduced from measured attenuation and phase characteristics for an SL InGaAsP-structure containing 15 quantum wells View full abstract»

• ### Fast-convergence filtered regressor algorithms for blind equalisation

Publication Year: 1996, Page(s):2114 - 2115
Cited by:  Papers (9)  |  Patents (1)
| | PDF (248 KB)

The authors present a simple extension of the standard Bussgang blind equalisation algorithms that significantly improves their convergence properties. The technique uses the inverse channel estimate to filter the regressor signal. The modified algorithms provide quasi-Newton convergence in the vicinity of a local minimum of the chosen cost function with only a modest increase in the overall compu... View full abstract»

• ### Performance enhancement for fuzzy adaptive resonance theory (ART) neural networks

Publication Year: 1996
Cited by:  Papers (2)
| | PDF (116 KB)

A modified fuzzy adaptive resonance theory neural network (ART) is used as a classifier for a texture recognition system. The system consists of a wavelet based low level feature detector and a high level ART classifier. The performance improvement is measured in terms of identification accuracy and computational burden View full abstract»

• ### Wavelength conversion with an optical parametric loop mirror

Publication Year: 1996, Page(s):2171 - 2172
Cited by:  Papers (1)  |  Patents (2)
| | PDF (200 KB)

Wavelength conversion of a 6.3 Gbit/s optical pulse signal based on four-wave mixing (FWM) has been demonstrated utilising an optical parametric loop mirror (PALM) which can separate the generated FWM wave from the input signal and pump waves without optical filtering. Bit error rate measurements have revealed that the PALM can achieve error free operation without optical filtering and can improve... View full abstract»

• ### Analysis of broadband microstrip-slotline transitions with multi-arm stubs

Publication Year: 1996, Page(s):2106 - 2108
Cited by:  Papers (7)  |  Patents (1)
| | PDF (288 KB)

For a compromised design of microstrip-slotline transitions with multi-arm stubs, the relation between the number of arms and the bandwidth is necessary. This issue is examined using a modelling technique based on the equivalent circuit of the transition. The technique is used to analyse two broadband (1-10 GHz and 5-50 GHz) transitions with stubs having different number of arms View full abstract»

• ### Optimum gain-equalised configuration of wideband erbium-doped fibre amplifier using inter-stage samarium-doped fibre and midway isolator

Publication Year: 1996, Page(s):2175 - 2177
Cited by:  Papers (3)  |  Patents (2)
| | PDF (344 KB)

The optimum gain-equalised configuration for the erbium-doped fibre amplifier (EDFA) using a samarium-doped fibre (SDF) is investigated. The dual-pumping scheme with inter-stage SDF and midway isolator was found to be the optimum scheme for obtaining flattened high spectral gain with variation of ⩽±0.7 dB and with a low noise figure of ⩽5.6 dB within the 1530-1560 nm range. This amp... View full abstract»

• ### FDTD ABC for waveguides with a new discrete Green's function and its effective implementation

Publication Year: 1996, Page(s):2128 - 2130
Cited by:  Papers (2)
| | PDF (316 KB)

The authors propose a new discrete Green's function and an effective implementation for the absorbing boundary condition for the FDTD simulation of waveguide problems. The Green's function is given analytically in a simple, closed-form formula. A simple exponential approximation method is used for an efficient ABC implementation View full abstract»

• ### 0.2 μm gate length, non-alloyed P+-AlInAs/N-AlInAs/GaInAs JHEMTs with ft=62 GHz

Publication Year: 1996, Page(s):2180 - 2181
| | PDF (212 KB)

Recently, the authors demonstrated improved breakdown characteristics in 1 μm gate length P+-AlInAs/N-AlInAs/GaInAs JHEMTs utilising a junction to modulate the 2-DEG and regrowth of the ohmic contact regions by MOCVD. The authors present high frequency operation (ft and fmax of 62 and 105 GHz, respectively) of 0.2 μm devices with high current (500 mA/mm) and ... View full abstract»

## Aims & Scope

Electronics Letters is internationally renowned for its rapid communication of new developments and emerging topics across the broad and interdisciplinary field of modern electronics and electrical engineering.

Full Aims & Scope

## Meet Our Editors

Editors-in-Chief

Professor Chris Toumazou
Director of the Biomedical Institute
Imperial College, London, UK

Professor Ian White
Head of Photonics Research
University of Cambridge, UK