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Novel In-Plane Semiconductor Lasers XVIII, 2019
Distributed Bragg reflector tapered diode lasers (DBR-TPL) emitting at 1064 nm are highly efficient and narrowband light sources which e.g. can be used for the treatment of eye diseases including the two main causes of blindness worldwide (i.e diabetic retinopathy and age-related macular degeneration) by laser coagulation via second harmonic generation
David Feise +8 more
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Distributed Bragg reflector tapered diode lasers (DBR-TPL) emitting at 1064 nm are highly efficient and narrowband light sources which e.g. can be used for the treatment of eye diseases including the two main causes of blindness worldwide (i.e diabetic retinopathy and age-related macular degeneration) by laser coagulation via second harmonic generation
David Feise +8 more
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Microelectronics Reliability, 1999
Abstract Changes in the threshold current and wavelength tuning characteristics due to the degradation of the active region and passive region in buried heterostructure (BH) distributed Bragg reflector (DBR) lasers are experimentally investigated. These changes are caused by the decrease in recombination carrier lifetime due to degradation.
H. Mawatari, M. Fukuda, Y. Tohmori
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Abstract Changes in the threshold current and wavelength tuning characteristics due to the degradation of the active region and passive region in buried heterostructure (BH) distributed Bragg reflector (DBR) lasers are experimentally investigated. These changes are caused by the decrease in recombination carrier lifetime due to degradation.
H. Mawatari, M. Fukuda, Y. Tohmori
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SPIE Proceedings, 2001
The realization of single-mode Distributed Feedback (DFB) and Distributed Bragg Reflector (DBR) lasers, based on surface grating structures is of considerable interest. Such devices offer a relatively simple grating fabrication process without complicated multistep-epitaxial growth or regrowth, as required in more conventional devices.
Hery Susanto Djie +2 more
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The realization of single-mode Distributed Feedback (DFB) and Distributed Bragg Reflector (DBR) lasers, based on surface grating structures is of considerable interest. Such devices offer a relatively simple grating fabrication process without complicated multistep-epitaxial growth or regrowth, as required in more conventional devices.
Hery Susanto Djie +2 more
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IEEE Journal of Selected Topics in Quantum Electronics, 2007
Thermal wavelength drift in a super-structure grating distributed Bragg reflector (SSG-DBR) laser is suppressed by introducing a thermal drift compensation waveguide into a DBR laser. Injecting a compensatory current into the thermal drift compensation waveguide greatly suppresses the drift, and also prevents SSG mode hopping during rapid wavelength ...
Naoki Fujiwara +5 more
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Thermal wavelength drift in a super-structure grating distributed Bragg reflector (SSG-DBR) laser is suppressed by introducing a thermal drift compensation waveguide into a DBR laser. Injecting a compensatory current into the thermal drift compensation waveguide greatly suppresses the drift, and also prevents SSG mode hopping during rapid wavelength ...
Naoki Fujiwara +5 more
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2017 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC), 2017
Tunable laser sources are required in a variety of applications such as absorption spectroscopy, optical communication and coherent optical detection schemes [1]. The tunability of these devices is often based on external cavities, which utilizes movable external gratings to select and tune the wavelength.
Mahmoud Tawfieq +7 more
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Tunable laser sources are required in a variety of applications such as absorption spectroscopy, optical communication and coherent optical detection schemes [1]. The tunability of these devices is often based on external cavities, which utilizes movable external gratings to select and tune the wavelength.
Mahmoud Tawfieq +7 more
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Japanese Journal of Applied Physics, 1988
A modified GaInAsP/InP BIG-DBR laser for restricting leakage current via the passive DBR region is proposed and realized by using an inner-island substrate with a quaternary blocking layer as well as employing an island-type active mesa process. As a result, superior lasing properties were attained such as a low CW threshold current of 22 mA, a ...
W. Wang +5 more
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A modified GaInAsP/InP BIG-DBR laser for restricting leakage current via the passive DBR region is proposed and realized by using an inner-island substrate with a quaternary blocking layer as well as employing an island-type active mesa process. As a result, superior lasing properties were attained such as a low CW threshold current of 22 mA, a ...
W. Wang +5 more
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physica status solidi (c), 2004
Two kinds of three pairs nitride/air distributed Bragg reflector (DBR) with depth over 1.3 μm and vertical sidewall were successfully fabricated by focused Ga ion beam (FIB) milling. One was the combination of 1st Bragg order air gap and 3rd Bragg order semiconductor wall DBR-A for the wavelength 514 nm, the other was the DBR-B facet with 3rd air gap ...
Qian Ren +5 more
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Two kinds of three pairs nitride/air distributed Bragg reflector (DBR) with depth over 1.3 μm and vertical sidewall were successfully fabricated by focused Ga ion beam (FIB) milling. One was the combination of 1st Bragg order air gap and 3rd Bragg order semiconductor wall DBR-A for the wavelength 514 nm, the other was the DBR-B facet with 3rd air gap ...
Qian Ren +5 more
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IEEE Photonics Technology Letters, 1996
We have investigated a closed-loop control system for molecular beam epitaxial growth of quarter-wavelength AlAs-GaAs distributed Bragg reflector (DBR) structures using in situ pyrometric interferometry. The quasi-sinusoidal PI data was being treated as an amplitude and phase modulated signal for control of layer thickness.
X. Liu, E. Ranalli, D.L. Sato, H.P. Lee
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We have investigated a closed-loop control system for molecular beam epitaxial growth of quarter-wavelength AlAs-GaAs distributed Bragg reflector (DBR) structures using in situ pyrometric interferometry. The quasi-sinusoidal PI data was being treated as an amplitude and phase modulated signal for control of layer thickness.
X. Liu, E. Ranalli, D.L. Sato, H.P. Lee
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2006 Optical Fiber Communication Conference and the National Fiber Optic Engineers Conference, 2006
We demonstrate a novel structure of photodiode. By incorporating the leaky optical waveguide with distributed-Bragg-reflector (DBR) and partially p-doped photo-absorption layer, this device exhibits much superior performance of speed, saturation power, and responsivity to the control without DBR mirrors.
W.-Y. Chiu +6 more
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We demonstrate a novel structure of photodiode. By incorporating the leaky optical waveguide with distributed-Bragg-reflector (DBR) and partially p-doped photo-absorption layer, this device exhibits much superior performance of speed, saturation power, and responsivity to the control without DBR mirrors.
W.-Y. Chiu +6 more
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Proceedings of the MATSUS Spring 2024 Conference, 2023
Eswaran Jayaraman +5 more
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Eswaran Jayaraman +5 more
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