Search Results - "Numai, Takahiro"
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Over 100 GHz 3-dB down bandwidth by direct modulation of a coupled cavity DFB-LD due to photon-photon resonance
Published in Optical and quantum electronics (01-02-2021)“…This paper reports on 3-dB down bandwidth of 110.6 GHz by direct modulation of a coupled cavity DFB-LD with phase-shifted/uniform gratings due to photon-photon…”
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High resonance frequency in a coupled cavity DFB-LD with two phase-shifts
Published in Optical and quantum electronics (2020)“…To realize a single-longitudinal-mode laser diode (LD) with high speed direct-modulation, a coupled cavity DFB-LD with two phase-shifts is proposed. From…”
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Simulation of a ridge-type semiconductor laser with transversal diffraction gratings
Published in Optical and quantum electronics (2022)“…This paper reports on improvement of stability of the fundamental horizontal transverse mode in a ridge-type semiconductor laser by incorporating transversal…”
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Simulation of a ridge-type semiconductor laser for separate confinement of horizontal transverse modes and carriers
Published in Optical and quantum electronics (01-07-2013)“…A ridge-type semiconductor laser with selectively proton-implanted cladding layers for separate confinement of horizontal transverse modes and carriers is…”
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Simulation of Ridge-Type Semiconductor Lasers with Selectively Proton-Implanted Cladding Layers
Published in Japanese Journal of Applied Physics (01-01-2010)“…A ridge-type semiconductor laser with selectively proton-implanted cladding layers is proposed, and lasing characteristics are simulated. In this laser,…”
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High resonance frequency in a coupled cavity DFB-LD with phase-shifted/uniform gratings by photon-photon resonance
Published in Optik (Stuttgart) (01-02-2020)“…To achieve high speed modulation of a semiconductor laser maintaining single longitudinal mode operation, a coupled cavity DFB-LD with phase-shifted/uniform…”
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Ridge-Type Semiconductor Lasers with Optical Antiguiding Layers for Horizontal Transverse Modes: Dependence on Step Positions
Published in Japanese Journal of Applied Physics (01-04-2009)Get full text
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Control of Spectral Photosensitivity in Stacked Color Sensors: Proposal and Theoretical Analysis
Published in Japanese Journal of Applied Physics (01-06-2008)Get full text
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Fiber-Pump Semiconductor Lasers with Optical Antiguiding Layers for Horizontal Transverse Modes: Dependence on Mesa Width
Published in Japanese Journal of Applied Physics (01-04-2009)Get full text
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Analysis of Photon Recycling in Semiconductor Ring Lasers
Published in Japanese Journal of Applied Physics (01-12-2000)“…Photon recycling in semiconductor ring lasers is theoretically analyzed. Dependence of threshold current, light output and modulation speed on photon recycling…”
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Enhancement of resonance frequency in a DFB-LD with internally incident modulated light
Published in Optik (Stuttgart) (01-10-2016)“…To achieve high speed modulation of a semiconductor laser maintaining single longitudinal mode operation, enhancement of resonance frequency in a DFB-LD with…”
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Semiclassical Approach in the Analysis of Ring Laser: I. Derivation of Rate Equations Including Backscattering and Interference
Published in Japanese Journal of Applied Physics (01-07-2000)“…In research on ring lasers, backscattering has been analyzed by adding phenomenological coupling terms into rate equations. However, it has been difficult to…”
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Semiclassical Approach in the Analysis of Ring Laser: II. Mode Coupling due to Backscattering and Interference
Published in Japanese Journal of Applied Physics (01-07-2000)“…In the research on ring lasers, the relationship between the lock-in phenomenon and backscattering was usually analyzed by treating the backscattered waves as…”
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Analysis of a high density two-dimensional vertical-cavity surface emitting laser array
Published in Japanese Journal of Applied Physics (01-10-1997)“…A two-dimensional vertical-cavity surface emitting laser array is expected to be a key device for parallel lightwave transmission and optical interconnection…”
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Dependence of total bandwidth and four-wave-mixing noises in FDM optical fiber transmission systems on the number of base units
Published in Optics communications (01-01-2013)“…The purpose of this paper is to reduce the total bandwidth and four-wave-mixing (FWM) noises in frequency-division-multiplexing optical fiber transmission…”
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Simulation of a ridge-type semiconductor laser with horizontal coupling of lateral modes
Published in Optical and quantum electronics (01-10-2014)“…A ridge-type semiconductor laser with horizontal coupling of lateral modes is proposed, and lasing characteristics are simulated. A groove is formed in the…”
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Simulation of a ridge-type semiconductor laser with partially formed anti-guiding cladding layers
Published in Optical and quantum electronics (01-07-2015)“…A ridge-type semiconductor laser with partially formed anti-guiding cladding layers is proposed, and lasing characteristics are simulated. With increases in…”
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Analysis of Light Intensity Characteristics in Semiconductor Ring Lasers
Published in Japanese Journal of Applied Physics (2002)Get full text
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Reduction of four-wave-mixing noises in FDM optical fiber transmission systems in unequally spaced frequency allocations using base units
Published in Optics communications (01-05-2013)“…The purpose of this paper is to reduce four-wave-mixing (FWM) noises with narrow total bandwidth in frequency-division-multiplexing optical fiber transmission…”
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