Prof. Michael J. Adams Profile

Prof. Michael J. Adams

at Univ of Essex

SPIE Involvement:

Author

Publications (32)

Proceedings Article | 9 May 2018 Presentation + Paper

Injection locking of two laterally-coupled semiconductor laser arrays

Nianqiang Li, Hadi Susanto, Benjamin Cemlyn, Ian Henning, Michael Adams

Proceedings Volume 10682, 106820Z (2018) https://doi.org/10.1117/12.2306158

KEYWORDS: Laser stabilization, Semiconductor lasers, Laser optics, Waveguides, Waveguide lasers, Numerical integration, Continuous wave operation

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Proceedings Article | 6 September 2017 Presentation + Paper

Quantum dot spin-V(E)CSELs: polarization switching and periodic oscillations

Nianqiang Li, Dimitris Alexandropoulos, Hadi Susanto, Ian Henning, Michael Adams

Proceedings Volume 10357, 103572G (2017) https://doi.org/10.1117/12.2272697

KEYWORDS: Quantum dots, Polarization, Switching, Atomic force microscopy, Physics, Vertical cavity surface emitting lasers, Quantum optics, Switches, Birefringence, Instrument modeling

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Proceedings Article | 14 March 2013 Paper

Two-wavelength switching with a 1310nm-QDot DFB laser

A. Hurtado, M. Nami, I. Henning, M. Adams, L. Lester

Proceedings Volume 8619, 861914 (2013) https://doi.org/10.1117/12.2014250

KEYWORDS: Switching, Laser optics, Bistability, Quantum wells, Laser applications, Stereolithography, Nanostructures, Polarization, Networks, Vertical cavity surface emitting lasers

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Proceedings Article | 11 May 2012 Paper

Mapping transients in the nonlinear dynamics of an optically injected VCSEL

Josh Toomey, Deborah Kane, Kevin Schires, Chetan Nichkawde, Antonio Hurtado, Ian Henning, Michael Adams

Proceedings Volume 8432, 843219 (2012) https://doi.org/10.1117/12.922168

KEYWORDS: Vertical cavity surface emitting lasers, Transient nonlinear optics, Polarization, Nonlinear dynamics, Laser systems engineering, Semiconductor lasers, Nonlinear optics, Complex systems, Systems modeling, Switching

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Proceedings Article | 28 February 2012 Paper

Dynamics of polarization switching in 1550nm-VCSELs under single and double optical injection

Antonio Hurtado, I. Henning, M. Adams

Proceedings Volume 8255, 82550A (2012) https://doi.org/10.1117/12.914449

KEYWORDS: Polarization, Vertical cavity surface emitting lasers, Picosecond phenomena, Singular optics, Switching, Modulation, Switches, Optical networks, Optical amplifiers, Optical spheres

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Proceedings Article | 1 June 2011 Paper

Polarized optical injection in long-wavelength vertical-cavity surface emitting lasers

A. Hurtado, K. Schires, N. Khan, R. Al-Seyab, I. Henning, M. Adams

Proceedings Volume 8069, 806906 (2011) https://doi.org/10.1117/12.886290

KEYWORDS: Vertical cavity surface emitting lasers, Polarization, Picosecond phenomena, Switching, Nonlinear dynamics, Stereolithography, Bistability, Chaos, Nonlinear optics, Optical networks

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Proceedings Article | 8 February 2011 Paper

Transverse mode selection and injection locking in 1550-nm multimode VCSELs induced by optical injection

A. Quirce, A. Valle, L. Pesquera, A. Hurtado, M. Adams

Proceedings Volume 7952, 79520N (2011) https://doi.org/10.1117/12.875216

KEYWORDS: Vertical cavity surface emitting lasers, Polarization, Signal processing, Single mode fibers, Multimode fibers, Semiconductor lasers, Modulation, Light, Tunable lasers, Laser sources

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An experimental investigation of the modal selection induced by optical injection in 1550 nm multitransverse-mode VCSELs is performed. The free-running VCSEL emits in two transverse modes that are linearly polarized in a direction referred as parallel. We consider the situation in which parallel polarized laser light is injected in the VCSEL in order to select its fundamental transverse mode. We analyze the dependence of the modal selection process on the wavelength detuning between the externally injected signal and the fundamental mode. The injected power needed to select the fundamental mode as a function of the wavelength detuning is measured for several values of the bias current. This injected power exhibits a minimum at a positive wavelength detuning. The curves obtained for different bias currents are very close for positive and large wavelength detuning, while they are very separated for smaller detuning. The selection of the fundamental mode can be obtained with a value of the injected power that changes only slightly with the bias current when the wavelength detuning is large and positive. These results indicate that operation at large and positive wavelength detuning is of interest in the long-distance single-mode fiber transmission of multimode injection-locked VCSELs because the selection of the fundamental mode is obtained with an injected power that is almost independent on the VCSEL bias current. Both, the minimum injected power and the wavelength detuning at which it appears increase with the VCSEL bias current. We describe the relation between transverse mode selection and injection locking by comparing the dependence of both phenomena on the wavelength detuning. Modal selection is accompanied by injection locking only for large and positive values of the wavelength detuning. For small detuning values, with the VCSEL biased with a low (high) current, the injected power required for modal selection is lower (higher) than that needed for injection locking.

Proceedings Article | 28 April 2010 Paper

Polarization bistability in long-wavelength multitransverse-mode VCSELs induced by orthogonal optical injection

A. Quirce, J. R. Cuesta, A. Valle, A. Hurtado, L. Pesquera, M. Adams

Proceedings Volume 7720, 77201V (2010) https://doi.org/10.1117/12.854250

KEYWORDS: Vertical cavity surface emitting lasers, Polarization, Bistability, Semiconductor lasers, Picosecond phenomena, Switching, All optical signal processing, Wafer-level optics, Optical communications, Stereolithography

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Proceedings Article | 27 April 2010 Paper

Spatio-temporal dynamics of a multi-section tunable laser with and without optical injection

C. Stolz, D. Labukhin, N. Zakhleniuk, R. Loudon, M. Adams

Proceedings Volume 7720, 77200F (2010) https://doi.org/10.1117/12.854015

KEYWORDS: Laser optics, Tunable lasers, Semiconductor lasers, Optical simulations, Inspection, Stereolithography, Critical dimension metrology, Laser applications, Singular optics, Nonlinear optics

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Proceedings Article | 26 February 2010 Paper

Experimental stability maps of a 1550nm-VCSEL subject to polarized optical injection

A. Hurtado, K. Schires, N. Khan, A. Quirce, A. Valle, L. Pesquera, I. Henning, M. Adams

Proceedings Volume 7597, 75971L (2010) https://doi.org/10.1117/12.842019

KEYWORDS: Polarization, Vertical cavity surface emitting lasers, Nonlinear dynamics, Chaos, Switching, Picosecond phenomena, Stereolithography, Optics manufacturing, Nonlinear optics, Laser stabilization

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Proceedings Article | 4 September 2008 Paper

Analysis of nonlinear dynamics and spin-flip parameters on elliptically polarized injection-locked VCSELs

A. Homayounfar, Michael Adams

Proceedings Volume 7036, 70361E (2008) https://doi.org/10.1117/12.803898

KEYWORDS: Vertical cavity surface emitting lasers, Birefringence, Chaos, Polarization, Atomic force microscopy, Nonlinear dynamics, Stereolithography, Switching, Systems modeling, Numerical simulations

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Proceedings Article | 12 June 2007 Paper

Reflective optical bistability and nonlinear switching in a 1550-nm vertical-cavity semiconductor optical amplifier (VCSOA)

Antonio Hurtado, Ian Henning, Michael Adams

Proceedings Volume 6593, 659320 (2007) https://doi.org/10.1117/12.724157

KEYWORDS: Nonlinear optics, Switching, Logic devices, Bistability, Optical amplifiers, Semiconductor optical amplifiers, Semiconductor lasers, Reflectivity, Logic, Tunable lasers

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Proceedings Article | 12 June 2007 Paper

Gain compression and recovery in semiconductor optical amplifiers

M. Adams

Proceedings Volume 6593, 65931W (2007) https://doi.org/10.1117/12.724121

KEYWORDS: Semiconductor optical amplifiers, Laser beam diagnostics, Picosecond phenomena, Continuous wave operation, Tunable lasers, Lithium, Quantum wells, Electronics engineering, Systems engineering

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Proceedings Article | 22 March 2007 Paper

Investigation of photodetector structures for THz emission by photomixing using numerical simulation

Angela Dyson, Ian Henning, Michael Adams

Proceedings Volume 6468, 64681Q (2007) https://doi.org/10.1117/12.717250

KEYWORDS: Doping, Terahertz radiation, Numerical simulations, Photodetectors, Indium gallium arsenide, Diffusion, Photodiodes, PIN photodiodes, Fourier transforms, Optical components

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Proceedings Article | 7 July 2005 Paper

Modelling spin-polarised VCSELs

Michael Adams, K. Yasin, A. Dyson

Proceedings Volume 5840, (2005) https://doi.org/10.1117/12.609111

KEYWORDS: Vertical cavity surface emitting lasers, Electrons, Polarization, Birefringence, Dichroic materials, Atomic force microscopy, Modeling, Anisotropy, Optical pumping, Numerical analysis

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Proceedings Article | 28 April 2005 Paper

Wavelength dependence of gain recovery time in semiconductor optical amplifiers

X. Li, D. Alexandropoulos, M. Adams, I. Lealman

Proceedings Volume 5722, (2005) https://doi.org/10.1117/12.602103

KEYWORDS: Picosecond phenomena, Semiconductor optical amplifiers, Instrument modeling, Tunable lasers, Optical amplifiers, Time metrology, Switching, Indium gallium arsenide, Measurement devices, Continuous wave operation

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Proceedings Article | 25 July 2003 Paper

Mode locking of semiconductor laser with curved waveguide and passive mode expander

Craig Williamson, Michael Adams

Proceedings Volume 4986, (2003) https://doi.org/10.1117/12.480223

KEYWORDS: Mode locking, Reflectivity, Semiconductor lasers, Picosecond phenomena, Waveguides, Modulation, Waveguide modes, Ocean optics, Semiconductors, Laser resonators

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Proceedings Article | 12 June 2002 Paper

Temperature dependence of the spontaneous emission factor in microcavities

Desi Ramoo, Michael Adams

Proceedings Volume 4646, (2002) https://doi.org/10.1117/12.470512

KEYWORDS: Mirrors, Optical microcavities, Photons, Refractive index, Vertical cavity surface emitting lasers, Free space, Solids, Free space optics, Quantization, Temperature metrology

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Proceedings Article | 29 May 2002 Paper

Wedge indentation of an elastoviscoplastic material

Zhihong Huang, Margaret Lucas, Michael Adams

Proceedings Volume 4537, (2002) https://doi.org/10.1117/12.468791

KEYWORDS: Interfaces, Mechanical engineering, Modeling, Numerical simulations, Finite element methods, Chemical elements, Promethium, Solids, Computer simulations, Standards development

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Proceedings Article | 29 May 2002 Paper

Effect of ultrasonic vibration on wedge indentation of a model elasto-viscoplastic material

Zhihong Huang, Margaret Lucas, Michael Adams

Proceedings Volume 4537, (2002) https://doi.org/10.1117/12.468766

KEYWORDS: Ultrasonics, Superposition, Temperature metrology, Mechanics, Interfaces, Mechanical engineering, Computer simulations, Atrial fibrillation, Modeling, Materials processing

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Proceedings Article | 9 July 2001 Paper

Optical characterization of GaInNAs

Richard Potter, Simone Mazzucato, Naci Balkan, Michael Adams, Paul Chalker, Tim Joyce, Tim Bullough

Proceedings Volume 4283, (2001) https://doi.org/10.1117/12.432617

KEYWORDS: Nitrogen, Gallium arsenide, Refractive index, Quantum wells, Ellipsometry, Indium, Luminescence, Optical properties, Chemical species, Epitaxy

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Proceedings Article | 9 July 2001 Paper

Optical properties of GaInNAs/GaAs laser structures

Dimitrios Alexandropoulos, Michael Adams

Proceedings Volume 4283, (2001) https://doi.org/10.1117/12.432590

KEYWORDS: Nitrogen, Semiconductors, Gallium arsenide, Quantum wells, Optical properties, Transition metals, Systems modeling, Refractive index, Optoelectronics, Mathematical modeling

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Proceedings Article | 9 July 2001 Paper

1.5-um surface emission from GaInAsP/InP HELLISH structures

Russell Sceats, Carl Hepburn, Richard Potter, Angela Dyson, Naci Balkan, Michael Adams

Proceedings Volume 4283, (2001) https://doi.org/10.1117/12.432628

KEYWORDS: Vertical cavity surface emitting lasers, Quantum wells, Reflectivity, Electroluminescence, Dielectrics, Mirrors, Structural design, Semiconductors, Distributed Bragg reflectors, Electron transport

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Proceedings Article | 9 July 2001 Paper

Light emission and absorption processes in a bidirectional wavelength converter/emitter

Jiing Wah, Rifat Yenidunya, Angela Dyson, Adrian Boland-Thoms, Naci Balkan, Michael Adams

Proceedings Volume 4283, (2001) https://doi.org/10.1117/12.432629

KEYWORDS: Electroluminescence, Quantum wells, Absorption, Gallium arsenide, Helium neon lasers, Instrument modeling, Silicon, Capacitance, Temperature metrology, Modulation

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Proceedings Article | 14 July 2000 Paper

Photoluminescence in Ga0.85In0.15As0.99N0.01/GaAs single quantum wells: effect of low-temperature heat treatment in N2

Richard Potter, Naci Balkan, Michael Adams, Paul Chalker, Tim Joyce, Tim Bullough

Proceedings Volume 3944, (2000) https://doi.org/10.1117/12.391403

KEYWORDS: Gallium arsenide, Heat treatments, Quantum wells, Molybdenum, Nitrogen, Annealing, Luminescence, Gallium, Chemical species, Temperature metrology

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Proceedings Article | 14 July 2000 Paper

Hot electron GaInAsP/InP surface emitter

Russell Sceats, Angela Dyson, Adrian Boland-Thoms, Naci Balkan, Michael Adams, Chris Button

Proceedings Volume 3944, (2000) https://doi.org/10.1117/12.391496

KEYWORDS: Quantum wells, Etching, Luminescence, Vertical cavity surface emitting lasers, Temperature metrology, Phonons, Structural design, Scattering, Distributed Bragg reflectors, Logic

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Proceedings Article | 6 August 1999 Paper

GaInAsP/InP vertical-cavity surface-emitting laser for 1.5-um operation

Russell Sceats, Desi Ramoo, J. Masum, Naci Balkan, Michael Adams, A. Dann, Simon Perrin, Ian Reid, J. Reed, P. Cannard, Michael Fisher, D. Elton, M. Harlow

Proceedings Volume 3625, (1999) https://doi.org/10.1117/12.356890

KEYWORDS: Vertical cavity surface emitting lasers, Temperature metrology, Mirrors, Fabry–Perot interferometers, Dielectrics, Dielectric mirrors, Reflectors, Reflectivity, Refractive index

Proceedings Article | 6 August 1999 Paper

Hot-electron VCSEL

Naci Balkan, Ismail Sokmen, Angela O'Brien-Davies, Richard Potter, Carl Hepburn, Adrian Boland-Thoms, Michael Adams, John Roberts

Proceedings Volume 3625, (1999) https://doi.org/10.1117/12.356892

KEYWORDS: Vertical cavity surface emitting lasers, Quantum wells, Gallium arsenide, Reflectivity, Electroluminescence, Physics, Semiconducting wafers, Measurement devices, Electron transport, Semiconductors

Proceedings Article | 7 July 1998 Paper

Measurements and modeling of the side-injection light-controlled bistable laser diode (SILC-BLD)

Steven Pegg, Michael Adams, Kai Poguntke

Proceedings Volume 3283, (1998) https://doi.org/10.1117/12.316723

KEYWORDS: Absorption, Bistable lasers, Diodes, Switches, Switching, Waveguides, Optical switching, Bistability, Cladding, Laser damage threshold

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Proceedings Article | 7 July 1998 Paper

Snakes, TOADs, and butterflies: optical nonlinearities in semiconductor laser devices

Michael Adams

Proceedings Volume 3283, (1998) https://doi.org/10.1117/12.316696

KEYWORDS: Optical amplifiers, Semiconductor lasers, Nonlinear optics, Switching, Modulation, Laser amplifiers, Physics, Refraction, Refractive index

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Proceedings Article | 7 July 1998 Paper

Operation of a novel hot-electron vertical-cavity surface-emitting laser

Naci Balkan, Angela O'Brien-Davies, A. Thoms, Richard Potter, Nigel Poolton, Michael Adams, J. Masum, Alpan Bek, Ali Serpenguzel, Atilla Aydinli, John Roberts

Proceedings Volume 3283, (1998) https://doi.org/10.1117/12.316680

KEYWORDS: Reflectivity, Vertical cavity surface emitting lasers, Quantum wells, Electroluminescence, Gallium arsenide, Semiconductors, Electron transport, Diffusion, Lasers, Physics

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Proceedings Article | 6 June 1997 Paper

Large-signal analysis of self-pulsating laser diodes

Michael Adams, Chanjira Sinthanayothin

Proceedings Volume 2994, (1997) https://doi.org/10.1117/12.275638

KEYWORDS: Semiconductor lasers, Numerical analysis, Instrument modeling, Bistability, Laser development, Numerical simulations, Physics, Modeling, Laser optics, Terbium

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