The Experts below are selected from a list of 117732 Experts worldwide ranked by ideXlab platform
Y Ueno - One of the best experts on this subject based on the ideXlab platform.
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168 gb s all optical wavelength conversion with a symmetric mach zehnder type switch
IEEE Photonics Technology Letters, 2001Co-Authors: S. Nakamura, Y Ueno, Kazuhito TajimaAbstract:Error-free all-optical wavelength conversion at 168 Gb/s, which is the highest repetition rate ever reported, has been achieved by using a symmetric-Mach-Zehnder (SMZ)-type switch. Low-power-penalty 84-Gb/s operation is also demonstrated. The push-pull switching mechanism of the SMZ switch enables such ultrafast operation based on cross-phase modulation associated with the carrier depletion in a semiconductor optical amplifier. The configuration of the delayed-Interference Signal-wavelength converter, which is a simplified variant of the SMZ switch, is used in this experiment.
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3.8-THz wavelength conversion of picosecond pulses using a semiconductor delayed-Interference Signal-wavelength converter (DISC)
IEEE Photonics Technology Letters, 1998Co-Authors: Y Ueno, K Tajima, S. Nakamura, S. KitamuraAbstract:A new all-optical semiconductor-band-filling-based wavelength converter, named delayed-Interference Signal-wavelength converter (DISC), is proposed. Its speed is not restricted by the carrier lifetime and its structure is very simple: it consists of only two essential components, namely, a semiconductor optical amplifier and a passive split-delay. Using this converter, 3.8-THz-shifted (from 1530 to 1560-nm) 14-ps-long pulses are generated from 1530-nm 140-fJ 0.7-ps pulses with high-conversion efficiency.
S. Kitamura - One of the best experts on this subject based on the ideXlab platform.
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3.8-THz wavelength conversion of picosecond pulses using a semiconductor delayed-Interference Signal-wavelength converter (DISC)
IEEE Photonics Technology Letters, 1998Co-Authors: Y Ueno, K Tajima, S. Nakamura, S. KitamuraAbstract:A new all-optical semiconductor-band-filling-based wavelength converter, named delayed-Interference Signal-wavelength converter (DISC), is proposed. Its speed is not restricted by the carrier lifetime and its structure is very simple: it consists of only two essential components, namely, a semiconductor optical amplifier and a passive split-delay. Using this converter, 3.8-THz-shifted (from 1530 to 1560-nm) 14-ps-long pulses are generated from 1530-nm 140-fJ 0.7-ps pulses with high-conversion efficiency.
S. Nakamura - One of the best experts on this subject based on the ideXlab platform.
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168 gb s all optical wavelength conversion with a symmetric mach zehnder type switch
IEEE Photonics Technology Letters, 2001Co-Authors: S. Nakamura, Y Ueno, Kazuhito TajimaAbstract:Error-free all-optical wavelength conversion at 168 Gb/s, which is the highest repetition rate ever reported, has been achieved by using a symmetric-Mach-Zehnder (SMZ)-type switch. Low-power-penalty 84-Gb/s operation is also demonstrated. The push-pull switching mechanism of the SMZ switch enables such ultrafast operation based on cross-phase modulation associated with the carrier depletion in a semiconductor optical amplifier. The configuration of the delayed-Interference Signal-wavelength converter, which is a simplified variant of the SMZ switch, is used in this experiment.
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3.8-THz wavelength conversion of picosecond pulses using a semiconductor delayed-Interference Signal-wavelength converter (DISC)
IEEE Photonics Technology Letters, 1998Co-Authors: Y Ueno, K Tajima, S. Nakamura, S. KitamuraAbstract:A new all-optical semiconductor-band-filling-based wavelength converter, named delayed-Interference Signal-wavelength converter (DISC), is proposed. Its speed is not restricted by the carrier lifetime and its structure is very simple: it consists of only two essential components, namely, a semiconductor optical amplifier and a passive split-delay. Using this converter, 3.8-THz-shifted (from 1530 to 1560-nm) 14-ps-long pulses are generated from 1530-nm 140-fJ 0.7-ps pulses with high-conversion efficiency.
Takashi Mukaiyama - One of the best experts on this subject based on the ideXlab platform.
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three dimensional matter wave interferometry of a trapped single ion
Physical Review Letters, 2021Co-Authors: Ami Shinjo, Masato Baba, Koya Higashiyama, Ryoichi Saito, Takashi MukaiyamaAbstract:We report on a demonstration of Ramsey interferometry by three-dimensional motion with a trapped $^{171}{\mathrm{Yb}}^{+}$ ion. We applied a momentum kick to the ion in a direction diagonal to the trap axes to initiate three-dimensional motion using a mode-locked pulse laser. The Interference Signal was analyzed theoretically to demonstrate three-dimensional matter-wave Interference. This work paves the way to realizing matter-wave interferometry using trapped ions.
Kohroh Kobayashi - One of the best experts on this subject based on the ideXlab platform.
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Investigation of Improvement of Dynamic Switching Operation for Wavelength Switch With Super-Structure-Grating (SSG)-DBR-LD, Delayed-Interference Signal-Wavelength Converter (DISC), and Bandpass Filter
Journal of Lightwave Technology, 2010Co-Authors: Takayoshi Mori, Hiroyuki Uenohara, Kohroh KobayashiAbstract:We demonstrate dynamic wavelength switching operation using a super-structure grating (SSG)-DBR-LD and a semiconductor optical amplifier (SOA)-delayed-Interference Signal-wavelength converter (DISC) for optical packet switch and buffering systems. The wavelength conversion-type optical switch has the advantage of lowering packet blocking probability and reducing numbers of the required SOAs in the DISC-type wavelength converter. However, we confirmed that large optical spikes occur at the timing of wavelength switching due to the optical chirping. By detuning the center wavelength of a bandpass filter to suppress optical chirped wavelength component, we could reduce the intensity of the spikes. We also observed the alternate wavelength switching operation with small optical spikes with fixed detuning of the bandpass filter and the fixed optical phase bias of the Mach-Zehnder Delayed Interferometer (MZDI) by setting the small current variation of the SSG-DBR-LD for wavelength switching. Error free performance was also achieved under back-to-back and 50 km single mode fiber transmission.