The Experts below are selected from a list of 20904 Experts worldwide ranked by ideXlab platform
Tetsuya Mizumoto - One of the best experts on this subject based on the ideXlab platform.
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Silicon Waveguide Optical Isolator Operating for TE Mode Input Light
IEEE Journal of Selected Topics in Quantum Electronics, 2016Co-Authors: Yuya Shoji, Akihiro Fujie, Tetsuya MizumotoAbstract:A Waveguide optical isolator with a nonreciprocal phase shift is promising for obtaining high-optical isolation owing to its single-polarization operation. A typical configuration enables operation for only the TM mode input light. A Silicon Waveguide polarization rotator with asymmetric two parallel Waveguides is implemented with the Silicon Waveguide optical isolator for operation with the TE mode input light. Maximal isolation of 26.7 dB at the wavelength of 1553 nm is demonstrated experimentally.
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OPtical add-drop multiplexer integrating Silicon Waveguide optical circulators and Bragg reflector
2015 20th Microoptics Conference (MOC), 2015Co-Authors: Keita Kato, Yuya Shoji, Tetsuya MizumotoAbstract:An optical add-drop multiplexer (OADM) is demonstrated by integrating Silicon Waveguide optical circulators and a Waveguide Bragg reflector. Two magneto-optical circulators and one vertical groove grating Bragg reflector is successfully integrated on a Silicon-on-insulator platform to achieve optical add and drop operations with a 10-nm wavelength band.
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Silicon Waveguide optical nonreciprocal devices based on magneto-optical phase shift
Integrated Optics: Devices Materials and Technologies XVIII, 2014Co-Authors: Tetsuya Mizumoto, Yuya Shoji, Kota MitsuyaAbstract:The nonreciprocal phase shift caused by the first-order magneto-optical effect is effective in realizing optical nonreciprocal devices such as optical isolators and circulators in Silicon Waveguide platforms. The low refractive index of the buried oxide layer in a Silicon-On-Insulator (SOI) Waveguide enhances the magneto-optical phase shift, which reduces the device footprints. In order to obtain the magneto-optical phase shift, it is required to integrate a magnetooptical material on the Silicon Waveguide. A surface activated direct bonding technique was developed to integrate a magneto-optical garnet single crystal on the Silicon Waveguides. Using this technique, a Silicon Waveguide optical isolator based on the magneto-optical phase shift was demonstrated with an optical isolation of 30 dB at a wavelength of 1548 nm. Furthermore, a four port optical circulator was demonstrated with maximum isolations of 33.5 and 29.1 dB in cross and bar ports, respectively, at a wavelength of 1543 nm. Excess insertion losses were 13 and 12.5 dB in the isolator and circulator, respectively.
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Demonstration of a Silicon Waveguide Optical Circulator
IEEE Photonics Technology Letters, 2013Co-Authors: Kota Mitsuya, Yuya Shoji, Tetsuya MizumotoAbstract:A four-port optical circulator based on a Mach–Zehnder interferometer is fabricated in a Silicon nanowire Waveguide. A magneto-optical garnet is directly bonded to the Silicon Waveguide using a surface activated bonding technique. Four-port circulator operation is demonstrated with a maximum isolation of 15.3 dB at a wavelength of 1531 nm.
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Optical nonreciprocal devices on Silicon Waveguide platforms
2013 Conference on Lasers and Electro-Optics Pacific Rim (CLEOPR), 2013Co-Authors: Yuya Shoji, Kota Mitsuya, Yuya Shirato, Tetsuya MizumotoAbstract:The magneto-optic effect is important to realize the optical nonreciprocal devices such as isolators and circulators. In this article, magneto-optical nonreciprocal devices are discussed that are based on Silicon Waveguide platforms.
Yeshaiahu Fainman - One of the best experts on this subject based on the ideXlab platform.
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optical bistability in a Silicon Waveguide distributed bragg reflector fabry perot resonator
Journal of Lightwave Technology, 2012Co-Authors: Andrew Grieco, Dawn T. H. Tan, Steve Zamek, Boris Slutsky, Maziar P. Nezhad, Yeshaiahu FainmanAbstract:We demonstrate optical bistability in a Silicon Waveguide Fabry-Perot resonator formed by a pair of distributed Bragg reflectors. In the bistable regime, the output power of the resonator ceases to be uniquely determined by the input power because multiple powers within the cavity satisfy the resonance condition. Pulsating behavior is observed within the resonator output, and is attributed to noise within the experimental setup driving the resonator between the multiple allowed output powers.
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Optical Bistability in a Silicon Waveguide Distributed Bragg Reflector Fabry–Pérot Resonator
Journal of Lightwave Technology, 2012Co-Authors: Andrew Grieco, Dawn T. H. Tan, Steve Zamek, Boris Slutsky, Maziar P. Nezhad, Yeshaiahu FainmanAbstract:We demonstrate optical bistability in a Silicon Waveguide Fabry-Perot resonator formed by a pair of distributed Bragg reflectors. In the bistable regime, the output power of the resonator ceases to be uniquely determined by the input power because multiple powers within the cavity satisfy the resonance condition. Pulsating behavior is observed within the resonator output, and is attributed to noise within the experimental setup driving the resonator between the multiple allowed output powers.
Shiming Gao - One of the best experts on this subject based on the ideXlab platform.
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reconfigurable dual channel all optical logic gate in a Silicon Waveguide using polarization encoding
Optics Letters, 2015Co-Authors: Shiming Gao, Xiaoyan Wang, Yanqiao Xie, Qiang YanAbstract:A reconfigurable dual-channel all-optical logic gate is proposed and experimentally demonstrated using four-wave mixing in a Silicon Waveguide for polarization encoding signals. Six logic functions, XNOR, AND, NOR, XOR, AB¯, and A¯B are implemented at two different wavelength channels by adjusting the polarization states of two 10 Gb/s non-return-to-zero polarization-shift keying (NRZ-PolSK) signals modulated by 10-bit on–off keying (OOK) sequences. The eye diagrams of the logic signals are clearly observed, and the logic functions are well demonstrated as the two incident NRZ-PolSK signals are both modulated by the OOK sequences, which originate from 231−1 pseudo-random binary sequences.
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Wavelength-assignable 1310/1550 nm wavelength conversion using completely phase-matched two-pump four-wave mixing in a Silicon Waveguide
Optics Communications, 2015Co-Authors: Jian Chen, Shiming GaoAbstract:Abstract A wavelength converter between 1310 and 1550 nm bands is presented based on two-pump four-wave mixing (FWM) in a Silicon Waveguide. The principle of the inter-band wavelength conversion is analyzed. For an arbitrary incident signal, the converted idler wavelength can be freely assigned by suitably setting the two pump wavelengths to completely satisfy the phase-matching condition. Simulation results show that the signal can be flexibly converted between 1310 and 1550 bands. The conversion efficiencies for the signals with different wavelengths are very stable because the FWM phase-matching condition is completely met. Using this two-pump FWM configuration, channel-selective function can also be realized for wavelength division multiplexing (WDM) signals by engineering the dispersion profile of the Silicon Waveguide according to the WDM channel spacing.
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low power penalty wavelength multicasting for 36 gbit s 16 qam coherent optical signals in a Silicon Waveguide
Optics Letters, 2014Co-Authors: Xiaoyan Wang, Lingchen Huang, Shiming GaoAbstract:All-optical wavelength multicasting has been experimentally demonstrated for 36 Gbit/s 16-quadrature amplitude modulation signals based on four-wave mixing processes in a Silicon Waveguide with multiple pumps. In our experiment, dual pumps are injected together with the signal into the Waveguide and nine idlers are generated, involving five wavelength multicasting channels. Coherent detection and advanced digital signal processing are employed, and the recovered constellation diagrams of the multicasting idlers show a root-mean-square error vector magnitude degradation as small as 2.74%. The bit error rate (BER) results are measured for these multicasting idlers, and the power penalties are all lower than 0.96 dB at the BER of 3.8×10−3 (corresponding to the forward error correction threshold).
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all optical wavelength conversion and five channel multicasting for 20 gbit s qpsk signals in a Silicon Waveguide
Optics Letters, 2014Co-Authors: Xiaoyan Wang, Lingchen Huang, Xianglian Feng, Shiming GaoAbstract:Wavelength conversion and five-channel multicasting for 20 Gbit/s quadrature phase-shift keying signals have been experimentally demonstrated based on four-wave mixing in a Silicon Waveguide with digital coherent detection. The eye diagrams and constellation diagrams of the converted and multicasting idlers are successfully observed. Moreover, the bit-error rates (BERs) of the generated idlers are measured and the power penalties are all less than 0.7 dB at a BER of 3×10−3.
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Electric control of pulse reshaping using an intracavity Silicon Waveguide
Laser Physics Letters, 2013Co-Authors: Shiming Gao, En-kuang Tien, Qi Song, Lizhong Cao, Yuewang Huang, Salih K. KalyoncuAbstract:Electric control of the pulse reshaping and compression is demonstrated using the two-photon absorption (TPA) and TPA-induced free-carrier absorption in an intracavity Silicon Waveguide. A forward bias is applied to the Silicon Waveguide to tune the free-carrier lifetime and density, hence enhancing the pulse compression effect. A pulse compression of about 30% is experimentally verified using a 3.3 V forward bias.
Yuya Shoji - One of the best experts on this subject based on the ideXlab platform.
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Silicon Waveguide Optical Isolator Operating for TE Mode Input Light
IEEE Journal of Selected Topics in Quantum Electronics, 2016Co-Authors: Yuya Shoji, Akihiro Fujie, Tetsuya MizumotoAbstract:A Waveguide optical isolator with a nonreciprocal phase shift is promising for obtaining high-optical isolation owing to its single-polarization operation. A typical configuration enables operation for only the TM mode input light. A Silicon Waveguide polarization rotator with asymmetric two parallel Waveguides is implemented with the Silicon Waveguide optical isolator for operation with the TE mode input light. Maximal isolation of 26.7 dB at the wavelength of 1553 nm is demonstrated experimentally.
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OPtical add-drop multiplexer integrating Silicon Waveguide optical circulators and Bragg reflector
2015 20th Microoptics Conference (MOC), 2015Co-Authors: Keita Kato, Yuya Shoji, Tetsuya MizumotoAbstract:An optical add-drop multiplexer (OADM) is demonstrated by integrating Silicon Waveguide optical circulators and a Waveguide Bragg reflector. Two magneto-optical circulators and one vertical groove grating Bragg reflector is successfully integrated on a Silicon-on-insulator platform to achieve optical add and drop operations with a 10-nm wavelength band.
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Silicon Waveguide optical nonreciprocal devices based on magneto-optical phase shift
Integrated Optics: Devices Materials and Technologies XVIII, 2014Co-Authors: Tetsuya Mizumoto, Yuya Shoji, Kota MitsuyaAbstract:The nonreciprocal phase shift caused by the first-order magneto-optical effect is effective in realizing optical nonreciprocal devices such as optical isolators and circulators in Silicon Waveguide platforms. The low refractive index of the buried oxide layer in a Silicon-On-Insulator (SOI) Waveguide enhances the magneto-optical phase shift, which reduces the device footprints. In order to obtain the magneto-optical phase shift, it is required to integrate a magnetooptical material on the Silicon Waveguide. A surface activated direct bonding technique was developed to integrate a magneto-optical garnet single crystal on the Silicon Waveguides. Using this technique, a Silicon Waveguide optical isolator based on the magneto-optical phase shift was demonstrated with an optical isolation of 30 dB at a wavelength of 1548 nm. Furthermore, a four port optical circulator was demonstrated with maximum isolations of 33.5 and 29.1 dB in cross and bar ports, respectively, at a wavelength of 1543 nm. Excess insertion losses were 13 and 12.5 dB in the isolator and circulator, respectively.
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Demonstration of a Silicon Waveguide Optical Circulator
IEEE Photonics Technology Letters, 2013Co-Authors: Kota Mitsuya, Yuya Shoji, Tetsuya MizumotoAbstract:A four-port optical circulator based on a Mach–Zehnder interferometer is fabricated in a Silicon nanowire Waveguide. A magneto-optical garnet is directly bonded to the Silicon Waveguide using a surface activated bonding technique. Four-port circulator operation is demonstrated with a maximum isolation of 15.3 dB at a wavelength of 1531 nm.
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Optical nonreciprocal devices on Silicon Waveguide platforms
2013 Conference on Lasers and Electro-Optics Pacific Rim (CLEOPR), 2013Co-Authors: Yuya Shoji, Kota Mitsuya, Yuya Shirato, Tetsuya MizumotoAbstract:The magneto-optic effect is important to realize the optical nonreciprocal devices such as isolators and circulators. In this article, magneto-optical nonreciprocal devices are discussed that are based on Silicon Waveguide platforms.
Kazuhiro Hane - One of the best experts on this subject based on the ideXlab platform.
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Ultra-small Silicon Waveguide coupler switch using gap-variable mechanism.
Optics express, 2011Co-Authors: Yuta Akihama, Yoshiaki Kanamori, Kazuhiro HaneAbstract:Submicron-wide Silicon Waveguide coupler with gap variable mechanism is proposed for a compact optical Waveguide switch. Two freestanding Silicon Waveguides are placed parallel with a submicron gap. The gap is changed by electrostatic comb-drive micro-actuators to control the coupling coefficient of the coupler. The fabricated device consisted of the Silicon Waveguides of 400 nm in width and 260 nm in thickness. The total size of the switch was 100 μm wide and 150 μm long. Decreasing the gap between the Waveguides to 110 nm, the output intensity at drop port became a maximum while the output intensity at through port became a minimum. The extension ratio of the switch output was 17 dB for the Waveguide displacement of 300 nm.
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submicron Silicon Waveguide optical switch driven by microelectromechanical actuator
Applied Physics Letters, 2008Co-Authors: Erdal Bulgan, Yoshiaki Kanamori, Kazuhiro HaneAbstract:A submicron Silicon Waveguide optical switch driven by a microelectromechanical actuator is fabricated. The switch is composed of single-mode Silicon input and output Waveguides and a movable Waveguide suspended by Silicon springs. Switching occurs when the air gap between input and output Waveguides is closed by displacing the movable Waveguide 540±20nm by an electrostatic comb actuator. The switch, fabricated on a Silicon-on-insulator wafer, is monolithic, and active switching region is as small as about 40×60μm2. An extinction ratio of 15±2dB is experimentally obtained between switch off and on states at 1.55μm wavelength.