The Experts below are selected from a list of 40506 Experts worldwide ranked by ideXlab platform
Hirohito Yamada - One of the best experts on this subject based on the ideXlab platform.
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narrow spectral linewidth silicon photonic wavelength Tunable Laser diode for digital coherent communication system
IEEE Journal of Selected Topics in Quantum Electronics, 2016Co-Authors: Tomohiro Kita, Rui Tang, Hirohito YamadaAbstract:We demonstrated wavelength Tunable Laser diodes with Si-wire waveguide ring resonators as an external optical cavity. The footprint of the optical cavity including the semiconductor optical amplifier is as small as 0.8 mm × 0.6 mm which is less 1/10 of those made of silicon oxinitride material. Wavelength tuning range of approximately 55 nm was demonstrated, which covers entire L-band of the optical communication wavelength system. Furthermore, a spectral linewidth narrower than 100 kHz was obtained by optimizing the design of the external optical cavity. The optical nonlinearity of silicon is described and the influence on Laser oscillation is also discussed.
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narrow spectral linewidth silicon photonic wavelength Tunable Laser with highly asymmetric mach zehnder interferometer
Optics Letters, 2015Co-Authors: Rui Tang, Tomohiro Kita, Hirohito YamadaAbstract:We propose a narrow-spectral-linewidth silicon photonic wavelength-Tunable Laser with a novel external wavelength-Tunable filter, which consists of two silicon ring resonators with different circumferences and a highly asymmetric Mach–Zehnder interferometer (MZI), the two optical paths of which have significantly different lengths. Calculations and experimental results indicated that the gain difference between longitudinal modes was increased by the highly asymmetric MZI. Consequently, a narrow spectral linewidth of 12 kHz and a stable single-mode oscillation were obtained.
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narrow spectral linewidth si photonic wavelength Tunable Laser diode for digital coherent optical communication
International Semiconductor Laser Conference, 2014Co-Authors: Rui Tang, Tomohiro Kita, Hirohito YamadaAbstract:A compact wavelength Tunable Laser diode for digital coherent optical communication was demonstrated with a wavelength Tunable filter consisting of silicon photonic wire waveguides. Stable single-mode operation with 17.8 dBm maximum output power as well as less than 100 kHz spectral line width were obtained.
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silicon photonic wavelength Tunable Laser diode with asymmetric mach zehnder interferometer
IEEE Journal of Selected Topics in Quantum Electronics, 2014Co-Authors: Tomohiro Kita, Keita Nemoto, Hirohito YamadaAbstract:We fabricated wavelength-Tunable Laser diodes using a Si photonic wavelength filter that consists of ring resonators and an asymmetric Mach-Zehnder interferometer. The footprint of the optical cavity including the semiconductor optical amplifier is small, 2.6 mm × 0.5 mm, which is about 1/9 of those for Tunable Laser diodes made of silicon oxynitride. The wavelength could be tuned over approximately 62 nm, which covers the entire L-band of the optical communication wavelength range. The maximum output power reaches 42.2 mW. Furthermore, a spectral line width narrower than 100 kHz was obtained. Such Tunable Laser diodes with narrow spectral line widths are suitable as light sources integrated into other digital coherent devices.
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narrow spectral linewidth and high output power si photonic wavelength Tunable Laser diode
International Conference on Group IV Photonics, 2013Co-Authors: Tomohiro Kita, Keita Nemoto, Hirohito YamadaAbstract:We fabricated wavelength Tunable Laser diodes with Si photonic wire waveguide ring resonators as an external optical cavity. Less than 100 kHz narrow spectral linewidth was obtained with small footprint. Our wavelength Tunable Laser diode shows sufficient good performance for practical use in digital coherent optical transmission systems.
Tomohiro Kita - One of the best experts on this subject based on the ideXlab platform.
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narrow spectral linewidth silicon photonic wavelength Tunable Laser diode for digital coherent communication system
IEEE Journal of Selected Topics in Quantum Electronics, 2016Co-Authors: Tomohiro Kita, Rui Tang, Hirohito YamadaAbstract:We demonstrated wavelength Tunable Laser diodes with Si-wire waveguide ring resonators as an external optical cavity. The footprint of the optical cavity including the semiconductor optical amplifier is as small as 0.8 mm × 0.6 mm which is less 1/10 of those made of silicon oxinitride material. Wavelength tuning range of approximately 55 nm was demonstrated, which covers entire L-band of the optical communication wavelength system. Furthermore, a spectral linewidth narrower than 100 kHz was obtained by optimizing the design of the external optical cavity. The optical nonlinearity of silicon is described and the influence on Laser oscillation is also discussed.
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narrow spectral linewidth silicon photonic wavelength Tunable Laser with highly asymmetric mach zehnder interferometer
Optics Letters, 2015Co-Authors: Rui Tang, Tomohiro Kita, Hirohito YamadaAbstract:We propose a narrow-spectral-linewidth silicon photonic wavelength-Tunable Laser with a novel external wavelength-Tunable filter, which consists of two silicon ring resonators with different circumferences and a highly asymmetric Mach–Zehnder interferometer (MZI), the two optical paths of which have significantly different lengths. Calculations and experimental results indicated that the gain difference between longitudinal modes was increased by the highly asymmetric MZI. Consequently, a narrow spectral linewidth of 12 kHz and a stable single-mode oscillation were obtained.
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narrow spectral linewidth si photonic wavelength Tunable Laser diode for digital coherent optical communication
International Semiconductor Laser Conference, 2014Co-Authors: Rui Tang, Tomohiro Kita, Hirohito YamadaAbstract:A compact wavelength Tunable Laser diode for digital coherent optical communication was demonstrated with a wavelength Tunable filter consisting of silicon photonic wire waveguides. Stable single-mode operation with 17.8 dBm maximum output power as well as less than 100 kHz spectral line width were obtained.
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silicon photonic wavelength Tunable Laser diode with asymmetric mach zehnder interferometer
IEEE Journal of Selected Topics in Quantum Electronics, 2014Co-Authors: Tomohiro Kita, Keita Nemoto, Hirohito YamadaAbstract:We fabricated wavelength-Tunable Laser diodes using a Si photonic wavelength filter that consists of ring resonators and an asymmetric Mach-Zehnder interferometer. The footprint of the optical cavity including the semiconductor optical amplifier is small, 2.6 mm × 0.5 mm, which is about 1/9 of those for Tunable Laser diodes made of silicon oxynitride. The wavelength could be tuned over approximately 62 nm, which covers the entire L-band of the optical communication wavelength range. The maximum output power reaches 42.2 mW. Furthermore, a spectral line width narrower than 100 kHz was obtained. Such Tunable Laser diodes with narrow spectral line widths are suitable as light sources integrated into other digital coherent devices.
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narrow spectral linewidth and high output power si photonic wavelength Tunable Laser diode
International Conference on Group IV Photonics, 2013Co-Authors: Tomohiro Kita, Keita Nemoto, Hirohito YamadaAbstract:We fabricated wavelength Tunable Laser diodes with Si photonic wire waveguide ring resonators as an external optical cavity. Less than 100 kHz narrow spectral linewidth was obtained with small footprint. Our wavelength Tunable Laser diode shows sufficient good performance for practical use in digital coherent optical transmission systems.
Rui Tang - One of the best experts on this subject based on the ideXlab platform.
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narrow spectral linewidth silicon photonic wavelength Tunable Laser diode for digital coherent communication system
IEEE Journal of Selected Topics in Quantum Electronics, 2016Co-Authors: Tomohiro Kita, Rui Tang, Hirohito YamadaAbstract:We demonstrated wavelength Tunable Laser diodes with Si-wire waveguide ring resonators as an external optical cavity. The footprint of the optical cavity including the semiconductor optical amplifier is as small as 0.8 mm × 0.6 mm which is less 1/10 of those made of silicon oxinitride material. Wavelength tuning range of approximately 55 nm was demonstrated, which covers entire L-band of the optical communication wavelength system. Furthermore, a spectral linewidth narrower than 100 kHz was obtained by optimizing the design of the external optical cavity. The optical nonlinearity of silicon is described and the influence on Laser oscillation is also discussed.
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narrow spectral linewidth silicon photonic wavelength Tunable Laser with highly asymmetric mach zehnder interferometer
Optics Letters, 2015Co-Authors: Rui Tang, Tomohiro Kita, Hirohito YamadaAbstract:We propose a narrow-spectral-linewidth silicon photonic wavelength-Tunable Laser with a novel external wavelength-Tunable filter, which consists of two silicon ring resonators with different circumferences and a highly asymmetric Mach–Zehnder interferometer (MZI), the two optical paths of which have significantly different lengths. Calculations and experimental results indicated that the gain difference between longitudinal modes was increased by the highly asymmetric MZI. Consequently, a narrow spectral linewidth of 12 kHz and a stable single-mode oscillation were obtained.
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narrow spectral linewidth si photonic wavelength Tunable Laser diode for digital coherent optical communication
International Semiconductor Laser Conference, 2014Co-Authors: Rui Tang, Tomohiro Kita, Hirohito YamadaAbstract:A compact wavelength Tunable Laser diode for digital coherent optical communication was demonstrated with a wavelength Tunable filter consisting of silicon photonic wire waveguides. Stable single-mode operation with 17.8 dBm maximum output power as well as less than 100 kHz spectral line width were obtained.
Keita Nemoto - One of the best experts on this subject based on the ideXlab platform.
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silicon photonic wavelength Tunable Laser diode with asymmetric mach zehnder interferometer
IEEE Journal of Selected Topics in Quantum Electronics, 2014Co-Authors: Tomohiro Kita, Keita Nemoto, Hirohito YamadaAbstract:We fabricated wavelength-Tunable Laser diodes using a Si photonic wavelength filter that consists of ring resonators and an asymmetric Mach-Zehnder interferometer. The footprint of the optical cavity including the semiconductor optical amplifier is small, 2.6 mm × 0.5 mm, which is about 1/9 of those for Tunable Laser diodes made of silicon oxynitride. The wavelength could be tuned over approximately 62 nm, which covers the entire L-band of the optical communication wavelength range. The maximum output power reaches 42.2 mW. Furthermore, a spectral line width narrower than 100 kHz was obtained. Such Tunable Laser diodes with narrow spectral line widths are suitable as light sources integrated into other digital coherent devices.
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narrow spectral linewidth and high output power si photonic wavelength Tunable Laser diode
International Conference on Group IV Photonics, 2013Co-Authors: Tomohiro Kita, Keita Nemoto, Hirohito YamadaAbstract:We fabricated wavelength Tunable Laser diodes with Si photonic wire waveguide ring resonators as an external optical cavity. Less than 100 kHz narrow spectral linewidth was obtained with small footprint. Our wavelength Tunable Laser diode shows sufficient good performance for practical use in digital coherent optical transmission systems.
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narrow spectral linewidth wavelength Tunable Laser with si photonic wire waveguide ring resonators
International Conference on Group IV Photonics, 2012Co-Authors: Keita Nemoto, Tomohiro Kita, Hirohito YamadaAbstract:We fabricated wavelength Tunable Laser diodes with Si-wire waveguide ring resonators as an external optical cavity. Less than 100 kHz narrow spectral linewidth was obtained by optimizing design of the ring resonators. The wavelength Tunable Laser diodes with narrow spectral linewidth are suitable as light sources for digital coherent optical transmission systems.
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narrow spectral linewidth wavelength Tunable Laser diode with si wire waveguide ring resonators
Applied Physics Express, 2012Co-Authors: Keita Nemoto, Tomohiro Kita, Hirohito YamadaAbstract:We fabricated wavelength-Tunable Laser diodes with Si wire waveguide ring resonators as an external optical cavity. The footprint of the optical cavity including the semiconductor optical amplifier is as small as 2.73×0.89 mm2, which is about 1/5 of those made of silicon oxinitride material. About 44-nm-wavelength tuning operation, which covers the entire L-band of the optical communication wavelength range, was obtained. Furthermore, spectral linewidth narrower than 100 kHz was obtained by optimizing the design of the external optical cavity. The Tunable Laser diodes with narrow spectral linewidth are suitable as light sources for digital coherent optical transmission systems.
K Kudo - One of the best experts on this subject based on the ideXlab platform.
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transmission over 360 km using a 2 5 gb s soa modulator integrated full c band wavelength Tunable transmitter
IEEE Photonics Technology Letters, 2006Co-Authors: M L Nielsen, Kaoru Sato, T Okamoto, K Tsuruoka, K Mizutani, S Sudo, K KudoAbstract:We present an external-cavity wavelength-Tunable Laser with a semiconductor optical amplifier-modulator monolithically integrated on the gain chip. The modulator chirp is analyzed, and it is explained how the chirp can be partially cancelled by self-phase modulation in the transmission fiber. Full C-band transmission of 2.5-Gb/s data over 360 km is demonstrated with small power penalty
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external cavity wavelength Tunable Laser with on chip voa using etched mirror based integration technology
Electronics Letters, 2006Co-Authors: Shinya Sudo, J. De Merlier, Kenji Mizutani, Kaoru Sato, T Okamoto, K Tsuruoka, K KudoAbstract:An external cavity wavelength Tunable Laser using a novel gain chip with a monolithically integrated variable optical attenuator is demonstrated. An output power tuning range of 55 dB and output powers in excess of 15 dBm were obtained over the whole C-band.
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a stable widely Tunable Laser using a silica waveguide triple ring resonator
Optical Fiber Communication Conference, 2005Co-Authors: Morio Takahashi, Kouichi Suzuki, Taro Kaneko, Masashige Ishizaka, Yukari Deki, S Takaesu, M Horie, Kenji Sato, K Kudo, Hiroyuki YamazakiAbstract:A Tunable Laser consisting of a silica-waveguide triple-ring resonator connected directly to a semiconductor optical amplifier is presented. Stable single-mode, grid-hopping free and full-band wavelength-digitally-tuning operations with 50-GHz channel spacing are successfully demonstrated.
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full c band external cavity wavelength Tunable Laser using a liquid crystal based Tunable mirror
IEEE Photonics Technology Letters, 2005Co-Authors: J. De Merlier, Kenji Mizutani, Shinya Sudo, Kaoru Sato, K Naniwae, Y Furushima, S Sato, K KudoAbstract:A compact full C-band external cavity wavelength Tunable Laser is proposed. The cavity contains a fixed etalon and makes use of a liquid-crystal-based Tunable mirror. The measurement results show a tuning range of 35 nm with fiber coupled power of more than 15 dBm. The sidemode suppression ratio is higher than 50 dB over the whole range and the relative intensity noise is below -148 dB/Hz. The linewidth is in worst case 700 kHz.
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high wavelength accuracy of a full c band external cavity Tunable Laser using an intracavity wavelength reference etalon
European Conference on Optical Communication, 2005Co-Authors: J. De Merlier, Kenji Mizutani, Shinya Sudo, Kenji Sato, Shinya Watanabe, K KudoAbstract:We experimentally demonstrate high wavelength accuracy of less than 1 GHz for a full C-band external cavity wavelength Tunable Laser without wavelength locker outside the cavity. Guidelines to further improve the accuracy are also proposed. (2 pages)