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IEE Proceedings - Optoelectronics

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• Three-section sampled-grating DBR lasers: modelling and measurements

Publication Year: 1996, Page(s):24 - 30
Cited by:  Papers (5)  |  Patents (2)
| | PDF (760 KB)

The authors consider tunable semiconductor lasers with a tuning range of 29.4 nm suitable for a range of applications including wavelength-division multiplexing and wavelength routing. The structure considered has three-sections for gain, phase adjustment and grating feedback, respectively, and has a new and novel mode of operation. The grating is sampled periodically to give multiple peaks in the... View full abstract»

• Reducing the effects of intersymbol interference in diffuse DPIM optical wireless communications

Publication Year: 2003, Page(s):445 - 452
Cited by:  Papers (6)
| | PDF (334 KB)

The paper investigates the performance of digital pulse interval modulation (DPIM) in the presence of multipath propagation and additive white Gaussian noise. To combat intersymbol interference (ISI), guard slots and a nonlinear equaliser have been introduced. The average optical power requirements (AOPR) due to ISI for cases with/without guard slots and with equaliser are analysed using a ceiling... View full abstract»

• Silicon-on-insulator optical rib waveguides: loss, mode characteristics, bends and y-junctions

Publication Year: 1994, Page(s):391 - 393
Cited by:  Papers (18)  |  Patents (10)
| | PDF (232 KB)

Optical rib waveguides with widths from 2.73 to 7.73 microns have been formed in SIMOX-based silicon-on-insulator (SOI) structures consisting of a 4.32 micron thick surface-silicon layer and a 0.398 micron buried-oxide layer. The effect of waveguide width, bend radius, y-junction splitting and interface roughness on loss and mode characteristics have been studied at wavelengths of 1.15 and 1.523 m... View full abstract»

• Terahertz pulse generation and detection with LT-GaAs photoconductive antenna

Publication Year: 2004, Page(s):98 - 101
Cited by:  Papers (9)  |  Patents (1)
| | PDF (1370 KB)

The characteristics of optically induced teraherz (THz) radiation from a biased low-temperature-grown GaAs (LT-GaAs) photoconductive antenna were investigated using a femtosecond Ti:sapphire laser. The THz pulse radiation from two different LT-GaAs photoconductive antennas were compared and two kinds of THz waveform were observed. Saturation behaviour of the emission of THz radiation is observed b... View full abstract»

• Monolithic and multi-gigahertz mode-locked semiconductor lasers: constructions, experiments, models and applications

Publication Year: 2000, Page(s):251 - 278
Cited by:  Papers (57)  |  Patents (13)
| | PDF (3076 KB)

Progress in technology, theory and applications of high-frequency mode-locked diode lasers is reviewed. We present a systematic overview of a wealth of experimental and theoretical results and approaches reported recently in the field of physics, technology and applications of monolithic mode-locked laser diodes View full abstract»

• Low-loss, single-mode GaAs/AlGaAs waveguides with large core thickness

Publication Year: 2006, Page(s):51 - 56
Cited by:  Papers (2)
| | PDF (278 KB)

Low-loss, single-mode waveguides with a large core thickness have been designed and fabricated in gallium arsenide/aluminium gallium arsenide waveguides. Detailed beam propagation method simulations were carried out to investigate the modal properties of the waveguides and were compared with measured results. For lengths of 2 cm, insertion losses of ≤3.5 dB were achieved when coupled to conical... View full abstract»

• Performance of multiple pulse position modulation on multipath channels

Publication Year: 1996, Page(s):360 - 364
Cited by:  Papers (11)
| | PDF (496 KB)

The effect of multipath dispersion on multiple pulse position modulation (MPPM) and its variants PPM and overlapping PPM are examined. Upper bounds for the error probability of each modulation scheme in the presence of intersymbol interference are presented, considering both an unequalised receiver and the optimal maximum-likelihood sequence detection receiver. Numerical results show that all the ... View full abstract»

• Investigation of new narrow-bandwidth a-Si:H photodetector

Publication Year: 1994, Page(s):150 - 156
| | PDF (416 KB)

A narrow-bandwidth hydrogenated amorphous silicon (a-Si:H) photodetector with a basic structure of Al/n+-i-p+-i-n-i-p-i-n+/ITO/glass has been investigated. The spectral response of this new photodetector was found to be affected by the absorption coefficient of a-Si:H material, surface recombination current, device layer thicknesses, and applied bias. The spectral ... View full abstract»

• Smallest possible electromagnetic mode volume in a dielectric cavity

Publication Year: 1998, Page(s):391 - 397
Cited by:  Papers (18)
| | PDF (644 KB)

In photonic crystals, electromagnetic waves can be confined in all three dimensions leading to very small mode volumes. Computational search has been for smallest electromagnetic mode which occurs in two-dimensional dielectric photonic crystals slabs. The smallest mode volume found was V≈2(λ/2n)3, where n is the refractive index. This small mode volume can lead to significant ... View full abstract»

• Comparison of modal gain and material gain for strong guiding slab waveguides

Publication Year: 2001, Page(s):131 - 133
Cited by:  Papers (1)
| | PDF (276 KB)

The relations between the gain factor, defined as the ratio of modal gain to material gain, and the optical confinement factor are discussed for the TE and TM modes in slab waveguides. For the TE modes, the gain factor is larger than the optical confinement factor, due to the zigzag propagation of the modal light ray in the core layers. For the TM modes, the existence of a nonzero electric field i... View full abstract»

• Effect of side wall roughness in buried channel waveguides

Publication Year: 1994, Page(s):242 - 248
Cited by:  Papers (23)  |  Patents (41)
| | PDF (452 KB)

An atomic force microscope is employed to measure the edge roughness of masks used in the fabrication of rectangular-core buried channel waveguides (BCWs) and to compare this with the corresponding roughness of the etched BCWs. Light attenuation due to scattering loss from the sides of the core can then be estimated using a simple statistical model to process the measured data View full abstract»

• Pulsed wideband IR thermal source

Publication Year: 1997, Page(s):315 - 322
Cited by:  Papers (1)  |  Patents (6)
| | PDF (1544 KB)

A pulsed mid-IR thermal source based on electrical heating of a thin metal alloy foil up to red heat (~900°C) and cooled by its own radiation has been studied. The device, with emitting area diameters ranging from 25 mm to 1.7 mm, is based on a suspended bispiral metal foil geometry which offers substantial thermal isolation from the supporting structure. The infrared emission is two sided, bu... View full abstract»

• Band structure calculation of InGaAsN//GaAs, InGaAsN//GaAsP//GaAs and InGaAsN//InGaAsP//InP strained quantum wells

Publication Year: 2004, Page(s):402 - 406
| | PDF (271 KB)

The authors have calculated the band structure of 1.3-μm InGaAsN/GaAs(N)/GaAs compressively strained quantum wells (QW) using the band anticrossing model and an eight-band k.p Hamiltonian. The calculated interband optical transition energies have been compared to the experimental ones deduced from photocurrent. Because of the high compressive strain in the QW, strain-compensated structures may ... View full abstract»

• OFDM over indoor wireless optical channel

Publication Year: 2005, Page(s):199 - 204
Cited by:  Papers (67)  |  Patents (3)
| | PDF (193 KB)

In this paper, the application of orthogonal frequency division multiplexing (OFDM) over an indoor wireless optical channel is investigated. Previous studies have demonstrated that it can be characterised as almost stationary but with a severe penalty induced by multipath propagation. It is also highly dependent on the spatial distribution of emitters and receivers. OFDM systems have been chosen o... View full abstract»

• Predicted performance of Franz-Keldysh effect optical reflection modulators and comparisons with similar multiple quantum well-based devices

Publication Year: 1994, Page(s):257 - 264
Cited by:  Papers (3)
| | PDF (440 KB)

In the paper the electroabsorption and electrorefraction spectra are calculated for GaAs, InGaAsP and InGaAs. These are compared both with experimental results and data from the literature giving very good agreement. From these calculations the behaviour of simple reflection modulators operating at 885 nm, 1.32 μm and 1.76 μm is quantified for a 3 dB insertion loss. This produces contrasts (... View full abstract»

• Duobinary technique for dispersion reduction in high capacity optical systems-modelling, experiment and field trial

Publication Year: 1996, Page(s):228 - 236
Cited by:  Papers (6)
| | PDF (884 KB)

The paper presents optical duobinary signalling as an alternative to the binary format for improved transmission performance in dispersion-limited systems and summarises results achieved from both experimental and theoretical investigations. The potential advantages of duobinary transmission for dispersion accommodation in high capacity systems are demonstrated in both laboratory experiments and i... View full abstract»

• Extrinsic Fabry-Perot interferometer vibration and acoustic sensor systems for airport ground traffic monitoring

Publication Year: 1997, Page(s):134 - 144
Cited by:  Papers (7)  |  Patents (30)
| | PDF (1236 KB)

The authors describe new fibre optic vibrational and acoustic sensor systems developed for airport ground traffic monitoring. The theoretical background of the extrinsic Fabry-Perot interferometer (EFPI) sensors is derived, and results of laboratory experiments as well as initial field tests in an experimental surface guidance and control system (ESMGCS) at the Braunschweig airport are reported View full abstract»

• Indoor ambient light noise and its effect on wireless optical links

Publication Year: 1996, Page(s):334 - 338
Cited by:  Papers (37)
| | PDF (552 KB)

Knowledge of ambient optical noise is essential for designers of free space optical links, for designing resilient circuits. An experimental characterisation of the most commonly encountered ambient optical radiation is presented. The study includes tungsten filament sources, low and high frequency fluorescent lights, IR headphones, TV remote controls and daylight. Practical means to reduce their ... View full abstract»

• Measurement of III-V quaternary composition using X-ray diffraction

Publication Year: 2001, Page(s):97 - 100
| | PDF (396 KB)

A method is demonstrated for the determination of quaternary compositions using a single X-ray measurement. By comparing the integrated intensity of a reflection with theoretical calculations and combining this with the mismatch of the layer, a solution for the composition can be determined. For the quaternary, InAlAsSb, the intensity of the (002) reflection is shown to depend strongly on composit... View full abstract»

• Integrating-sphere diffuser for wireless infrared communication

Publication Year: 2000, Page(s):281 - 285
Cited by:  Papers (7)
| | PDF (440 KB)

The application of an integrating sphere (IS) as a diffuser in a wireless infrared (IR) network is investigated. Going beyond the simplified analytical model, it is shown that ray-tracing simulations provide realistic data for the optical insertion loss: the transfer function and the far-field light distribution. As an example, a sphere diffuser for a 155 Mbit/s 16-PPM IR transmitter is investigat... View full abstract»

• Adaptive OFDM system for communications over the indoor wireless optical channel

Publication Year: 2006, Page(s):139 - 144
Cited by:  Papers (22)
| | PDF (275 KB)

First Page of the Article
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• Amplification of strong picosecond optical pulses in semiconductor optical amplifiers

Publication Year: 1999, Page(s):45 - 50
Cited by:  Papers (7)
| | PDF (624 KB)

Numerical simulations have been undertaken to investigate the amplification of strong picosecond optical pulses in semiconductor optical amplifiers (SOAs). Taking into account carrier heating, spectral holeburning, two-photon absorption (TPA) and ultrafast nonlinear refraction (UNR) effects. It is shown that both the TPA and UNR play important roles in determining the output pulse properties if th... View full abstract»

• Spun linear birefringence fibres and their sensing mechanism in current sensors with temperature compensation

Publication Year: 1994, Page(s):373 - 380
Cited by:  Papers (6)  |  Patents (4)
| | PDF (484 KB)

A single-mode spun linear birefringence fibre is investigated as a periodic structure. By using coupled-mode theory, the modal fields and the propagation coefficients of the two eigenmodes in this fibre are given theoretically for the first time. A spun highly linear birefringence (SHB) fibre is capable of acting as a sensing coil of relatively high sensitivity and temperature stability in current... View full abstract»

• Flat-panel backlight for view-sequential 3D display

Publication Year: 2004, Page(s):486 - 489
Cited by:  Papers (1)  |  Patents (14)
| | PDF (885 KB)

A slim backlight has been developed that emits collimated light whose direction can be scanned. The backlight is expected to enable the construction of a flat-panel view-sequential 3D display. The boundaries between the light-emitting diodes that illuminate each view are eliminated using homogenisers which are only 9 mm long. The result is uniform illumination of each view and no observable singul... View full abstract»

• SAW-driven optical microcavities for device applications

Publication Year: 2006, Page(s):326 - 329
| | PDF (387 KB)

The optical properties of microcavity (MC) polaritons parametrically driven by a surface acoustic wave (SAW) is analysed. In this case, the resonant acousto-optic nonlinearity gives rise to a very short light-acoustic wave' interaction length even for rather modest acoustic intensities. This can effectively be used for possible device applications. Two schemes SAW pumping-optical probing' are pr... View full abstract»

• Dicode pulse-position modulation: a novel coding scheme for optical-fibre communications

Publication Year: 2003, Page(s):125 - 131
Cited by:  Papers (5)
| | PDF (445 KB)

Pulse position modulation (PPM) schemes have been proposed as a method of utilising the bandwidth available in optical fibres, with a 5-11 dB improvement in sensitivity being achieved compared to an equivalent pulse code modulation (PCM) system. However, this improvement comes at a cost. If digital PPM is used, the final data rate can be almost 23 times that of the original PCM, and this makes imp... View full abstract»

• Coherent detection of mid-infrared radiation up to 60 THz with an LT-GaAs photoconductive antenna

Publication Year: 2002, Page(s):105 - 109
Cited by:  Papers (8)  |  Patents (4)
| | PDF (425 KB)

The shaker modulation technique is demonstrated for ultrabroadband detection of terahertz (THz) radiation with a low-temperature-grown GaAs photoconductive (PC) antenna gated with 15 fs laser pulses. The differentiation of the time-resolved waveforms with the shaker modulation is advantageous to enhance the high-frequency components of the detected radiation without degrading the signal-to-noise r... View full abstract»

• The interaction between fibre dispersion and laser phase noise in an ASK self-heterodyne millimetre-wave fibre-radio system

Publication Year: 1999, Page(s):177 - 180
Cited by:  Papers (1)
| | PDF (312 KB)

An analysis is presented of the BER achievable in an ASK modulated millimetre-wave self-heterodyne fibre radio system. The analysis shows that such systems require a depressed decision threshold if they are to exhibit optimum performance. This is due to the conversion of laser phase noise to intensity noise after the two optical carriers have experienced different delays due to propagation through... View full abstract»

• Gain measurement of semiconductor laser diodes: requirements for the wavelength resolution and sensitivity to noise

Publication Year: 1994, Page(s):13 - 15
Cited by:  Papers (5)
| | PDF (208 KB)

The gain-measurement methods of Hakki-Paoli and Cassidy are investigated theoretically with respect to accuracy of gain evaluation and sensitivity to noise. The Cassidy method proves to be less sensitive to noise than the Hakki-Paoli method if an additional averaging procedure is introduced. The results presented permit easy establishment of the required performance of an appropriate measurement s... View full abstract»

• Experimental characterisation and modelling of the reflection of infrared signals on indoor surfaces

Publication Year: 1998, Page(s):191 - 197
Cited by:  Papers (16)
| | PDF (908 KB)

The performance of non-line-of-sight indoor wireless infrared communication systems depends on the reflection characteristics of the surfaces that surround the communication space. This paper presents a set of measured reflection patterns of the most common indoor surfaces and the approximation of those experimental patterns using two reflection models, that of Lambert and of Phong. The results sh... View full abstract»

• Characterisation of low-loss waveguide bends with offset-optimisation for compact photonic integrated circuits

Publication Year: 2000, Page(s):382 - 388
Cited by:  Papers (4)
| | PDF (684 KB)

Use of a semivectorial finite element-based beam propagation method is benchmarked with the results available by using alternative numerical methods to analyse compact optical bends in photonic integrated circuits. It is also shown that the incorporation of the perfectly matched layers boundary condition is a superior approach for the treatment of high radiation loss from compact bends to the more... View full abstract»

• Improved design of a 64×64 arrayed waveguide grating based on silicon-on-insulator substrate

Publication Year: 2006, Page(s):57 - 62
| | PDF (292 KB)

The arrayed waveguide grating (AWG) multiplexer is a key component in wavelength division multiplexing fibre-optic communication systems. In this paper, an integrated optical 64×64 AWG with 0.4 nm (50 GHz) channel spacing at 1.55 μm based on silicon-on-insulator substrate is designed and analysed. An optimal value of waveguide separation at the junction between the arrayed waveguides regi... View full abstract»

• Recent progress in silica-based planar lightwave circuits on silicon

Publication Year: 1996, Page(s):257 - 262
Cited by:  Papers (26)  |  Patents (30)
| | PDF (632 KB)

Low-loss integrated silica waveguides on silicon allow the efficient interaction of guided-wave optical signals and are used to form a variety of planar lightwave circuits for optical branching, switching and filtering. Silica waveguides can also be used as platforms (motherboards) for hybrid optoelectronic (OE) integration. The paper reviews recent progress on silica waveguide technologies which ... View full abstract»

• Integrated silicon optical receiver with avalanche photodiode

Publication Year: 2003, Page(s):235 - 237
Cited by:  Papers (7)
| | PDF (262 KB)

An optical receiver consisting of an avalanche photodiode integrated with a transimpedance amplifier is reported. The optical receiver was fabricated on a 2 μm thick SOI substrate in a 130 nm unmodified CMOS process flow. The unity gain external quantum efficiency of the photodetectors was ∼10% at 850 nm. Optimum sensitivity was achieved for an avalanche gain M=8. This gain accounted for 5 ... View full abstract»

• Simultaneous measurement of strain and temperature using the first and second-order diffraction wavelengths of Bragg gratings

Publication Year: 1997, Page(s):156 - 161
Cited by:  Papers (11)  |  Patents (22)
| | PDF (560 KB)

A method of discriminating between temperature and strain effects in using a conventionally written, in-fibre grating is presented. The technique uses wavelength information from the first and second diffraction orders of the grating element to determine the wavelength dependent strain and temperature coefficients, from which independent temperature and strain measurements can be made. The authors... View full abstract»

• Silicon-based fabrication process for production of optical waveguides

Publication Year: 1996, Page(s):37 - 40
Cited by:  Patents (15)
| | PDF (592 KB)

The fabrication of silicon waveguides for use as optical interconnects in silicon optoelectronic integrated circuits for wavelengths beyond 1.1 μm is described. The process does not require silicon-on-insulator technology, and only uses VLSI processing techniques. Long, thin mesas are etched from a silicon substrate and masked along their sides with silicon nitride. The ridges are then isotropi... View full abstract»

• Physics of high-power InGaN/GaN lasers

Publication Year: 2002, Page(s):145 - 151
Cited by:  Papers (32)  |  Patents (2)
| | PDF (625 KB)

The authors analyse the performance and device physics of nitride laser diodes that exhibit the highest room-temperature continuous-wave output power. The analysis is based on advanced laser simulation. The laser model self-consistently combines band structure and free-carrier gain calculations with two-dimensional simulations of wave guiding, carrier transport and heat flux. Material parameters u... View full abstract»

• High-performance 1.3 /spl mu/m InAs/GaAs quantum-dot lasers with low threshold current and negative characteristic temperature

Publication Year: 2006, Page(s):280 - 283
Cited by:  Papers (1)
| | PDF (315 KB)

A high-growth-temperature GaAs spacer layer (HGTSL) is shown to significantly improve the performance of 1.3 mum multilayer InAs/GaAs quantum-dot (QD) lasers. The HGTSL inhibits threading dislocation formation, resulting in enhanced electrical and optical characteristics and hence improved performance of QD lasers. To further reduce the threshold current density and improve the room-temperature ch... View full abstract»

• Propagation modelling for indoor optical wireless communications using fast multi-receiver channel estimation

Publication Year: 2003, Page(s):473 - 481
Cited by:  Papers (19)
| | PDF (326 KB)

An iterative site-based method is described for estimating the impulse response of optical wireless channels. The method allows for the simultaneous evaluation of channels for many receiver or transmitter locations, thus providing significantly improved calculation times. A simple geometrical model of indoor environments is presented which includes interior features such as partitions, people, and... View full abstract»

• High speed (>13 GHz) modulation of 850 nm vertical cavity surface emitting lasers (VCSELs) with tapered oxide confined layer

Publication Year: 2005, Page(s):170 - 173
Cited by:  Papers (3)  |  Patents (1)
| | PDF (387 KB)

Improved oxide-implanted VCSELs utilising the tapered oxide layer are presented. The VCSELs exhibited similar static performance, but superior modulation bandwidth up to 13.2 GHz, compared with conventional blunt oxide VCSELs. The damping rate was reduced two times in the tapered oxide VCSEL and therefore enhanced the maximal modulation bandwidth. A very clean eye was demonstrated from the improve... View full abstract»

• Performance of infrared transmission systems under ambient light interference

Publication Year: 1996, Page(s):339 - 346
Cited by:  Papers (16)
| | PDF (836 KB)

Optical transmission systems are mainly impaired by the shot noise induced by ambient light, the transmitted optical power limitations (high path losses), the channel bandwidth limitations owing to multipath dispersion and the interference produced by artificial light sources. Several modulation and encoding schemes have been proposed for this channel and their performance has been studied and pre... View full abstract»

• High-efficiency AlGaInP/AlGaAs vertical-cavity surface-emitting lasers with 650 nm wavelength

Publication Year: 2003, Page(s):110 - 114
Cited by:  Papers (2)
| | PDF (398 KB)

The optimisation of red, AlGaInP/AlGaAs-based, selectively oxidised vertical-cavity surface-emitting lasers (VCSELs) with 650 nm emission wavelength having all-semiconductor p-distributed Bragg reflectors is reported. The increase of the AlP content in parts of the cavity, tailoring of the doping profile and removal of the contact layer in the output window lead to VCSELs with threshold current de... View full abstract»

• Coupling losses in multimode waveguides due to misalignment

Publication Year: 2005, Page(s):145 - 150
| | PDF (466 KB)

Suspended waveguides with discontinuities can be misaligned both longitudinally and laterally, thus enabling controllable light attenuation and switching. The effect of such misalignment on the transmission losses is investigated. Data collected in experiments with multimode waveguides show a monotonous decrease of the transmission with lateral displacement. In an optical train comprising a single... View full abstract»

• Self-heating effects in red (665 nm) VCSELs

Publication Year: 2001, Page(s):256 - 260
| | PDF (431 KB)

The threshold current (Ith) of GaInP/AlGaInP based vertical cavity surface emitting lasers (VCSELs) is very sensitive to temperature. The extent to which self-heating in a compact VCSEL structure couples with temperature sensitive loss mechanisms is investigated. In particular, the authors consider the strong increase in threshold current (Ith) due to carrier leakage into the... View full abstract»

• Analytical theory of coupled-waveguide Bragg reflectors and resonant transmission filters

Publication Year: 1995, Page(s):209 - 218
Cited by:  Papers (1)
| | PDF (772 KB)

A simple coupled-mode theory (CMT) is presented for the analysis of coupled waveguide Bragg reflectors and phase-shifted resonant transmission filters for dense wavelength division multiplexing (WDM) applications. This theory combines the normal mode-based orthogonal CMT for the mode coupling and the waveguide mode-based nonorthogonal CMT for the mode excitation at the input/output junctions. Anal... View full abstract»

• Spectral gain and noise evaluation of SOA and SOA-based switch matrix

Publication Year: 2001, Page(s):125 - 130
Cited by:  Papers (7)
| | PDF (448 KB)

The spectral dependence of the gain and noise figure of a 1.55 μm semiconductor optical amplifier (SOA) in linear and saturated operation is calculated using an accurate description of the population inversion factor nsp using a detailed density-matrix gain model, and taking longitudinal nonuniformity of carrier density into account by properly sectioning the device. Results show tha... View full abstract»

• Analysis of dual-stage erbium-doped fibre amplifiers with passive equalisation filters

Publication Year: 1999, Page(s):153 - 158
Cited by:  Patents (3)
| | PDF (600 KB)

The gain and noise properties of dual-stage gain flattened erbium doped fibre amplifiers (EDFA) are analysed. Simple expressions are derived to aid the design and understanding of the dual-stage EDFAs. Simulation is also carried out to determine the behaviour of EDFAs when subject to different operating parameters. It is found that a dual-stage EDFA incorporating an equalisation filter, variable a... View full abstract»

• Expansion of an arbitrary field in terms of waveguide modes

Publication Year: 1994, Page(s):16 - 20
Cited by:  Papers (6)
| | PDF (328 KB)

The problem of expanding a field over the set of waveguide modes is well known. Nevertheless, one may find small differences in the way this concept is used. Some employ a superposition of waveguide modes that include all field components, and a mode is considered as a single entity which propagates undisturbed along the structure. Others prefer to expand only the transverse-field components, wher... View full abstract»

• Full-vectorial mode calculations by finite difference method

Publication Year: 1994, Page(s):281 - 286
Cited by:  Papers (31)
| | PDF (352 KB)

Finite difference calculations of full-vectorial modes of optical waveguides are presented. This method has overcome the limitations of the semivectorial approximation and is able to calculate full-vectorial modes of arbitrary order for a given structure with an arbitrary refractive index profile. Numerical results show that the method is accurate. In addition, the leakage phenomenon of the higher... View full abstract»

• High-power mid-infrared light emitting diodes grown by MOVPE

Publication Year: 2002, Page(s):36 - 39
Cited by:  Papers (1)  |  Patents (1)
| | PDF (473 KB)

Light emitting diodes (LEDs) are fabricated on the basis of MOVPE-grown N-InAsSbP/n-InAsSb/P-InAsSbP heterostructures. LEDs operating in the 3.45-4.45 μm wavelength range at room temperature are produced by employing InAsSb active layers with different Sb content. The photoluminescence of InAsSb layers and electroluminescence properties of LEDs are investigated. LED light-current characteristic... View full abstract»

Aims & Scope

Published from 1994-2006, IEE Proceedings - Optoelectronics contained significant and original contributions on optoelectronics, including: optical and optoelectronic materials; light sources; optical modulation and multiplexing; optical fibres, cables and connectors; optical amplifiers; photodetectors and optical receivers; photonic integrated circuits; nanophotonics and photonic crystals; optical signal processing; holography; and displays.

Full Aims & Scope