The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Jelena Vuckovic - One of the best experts on this subject based on the ideXlab platform.
-
ultrafast Direct Modulation of a single mode photonic crystal nanocavity light emitting diode
Conference on Lasers and Electro-Optics, 2012Co-Authors: Gary Shambat, Bryan Ellis, Arka Majumdar, Jan Petykiewicz, Marie A Mayer, Tomas Sarmiento, J S Harris, E E Haller, Jelena VuckovicAbstract:We demonstrate an electrically driven single mode photonic crystal cavity LED with record speed of operation (10 GHz) and 0.25 fJ/bit energy consumption, the lowest of any optical transmitter to date.
-
ultrafast Direct Modulation of a single mode photonic crystal nanocavity light emitting diode
Nature Communications, 2011Co-Authors: Gary Shambat, Bryan Ellis, Arka Majumdar, Jan Petykiewicz, Marie A Mayer, Tomas Sarmiento, J S Harris, E E Haller, Jelena VuckovicAbstract:Photonic alternatives to electrical circuits require low energy demand and fast Modulation speed, which has proven difficult for on-chip devices. Using quantum dot photonic crystal nanocavities, Vuckovic et al. demonstrate an electrically-switchable light-emitting diode with such capabilities.
E Kapon - One of the best experts on this subject based on the ideXlab platform.
-
25 gbps Direct Modulation and 10 km data transmission with 1310 nm waveband wafer fused vcsels
Optics Express, 2016Co-Authors: A Caliman, A Mereuta, P Wolf, Alexei Sirbu, V Iakovlev, D Bimberg, E KaponAbstract:Direct Modulation at >25 Gbps is achieved with 1310 nm wavelength wafer fused VCSELs by adjusting the strain in the quantum well active region and the cavity photon lifetime. 25 + Gbps large signal Modulation with 10-12 BER at 1310 nm across 10 km of standard single mode fiber is demonstrated.
-
25 gbps Direct Modulation and data transmission with 1310 nm waveband wafer fused vcsels
Optical Fiber Communication Conference, 2016Co-Authors: A Caliman, A Mereuta, P Wolf, Alexei Sirbu, V Iakovlev, D Bimberg, E KaponAbstract:25 Gb/s transmission over 10 km of standard single mode fiber is demonstrated for 1300 nm wafer fused InP/GaAs VCSELs with increased strain in quantum wells and higher output coupling from the cavity.
Takeshi Kitatani - One of the best experts on this subject based on the ideXlab platform.
-
Direct Modulation at 56 and 50 gb s of 1 3 mu m ingaalas ridge shaped bh dfb lasers
IEEE Photonics Technology Letters, 2015Co-Authors: K Nakahara, Takeshi Kitatani, Yuki Wakayama, Takafumi Taniguchi, Toshihiko Fukamachi, Yasushi Sakuma, Shigehisa TanakaAbstract:Direct Modulation at 56 and 50 Gb/s of 1.3- $\mu $ m InGaAlAs ridge-shaped-buried heterostructure (RS-BH) asymmetric corrugation-pitch-Modulation (ACPM) distributed feedback lasers is experimentally demonstrated. The fabricated lasers have a low threshold current (5.6 mA at 85 °C), high temperature characteristics (71 K), high slope relaxation frequency (3.2 GHz/mA $^{\mathrm {\mathbf {1/2}}}$ at 85 °C), and wide bandwidth (22.1 GHz at 85 °C). These superior properties enable the lasers to run at 56 Gb/s and 55 °C and 50 Gb/s at up to 80 °C for back-to-back operation with clear eye openings. This is achieved by the combination of a low-leakage RS-BH and an ACPM grating. Moreover, successful transmission of 56- and 50-Gb/s modulated signals over a 10-km standard single-mode fiber is achieved. These results confirm the suitability of this type of laser for use as a cost-effective light source in 400 GbE and OTU5 applications.
-
56 gb s Direct Modulation in ingaalas bh dfb lasers at 55 c
Optical Fiber Communication Conference, 2014Co-Authors: K Nakahara, Takeshi Kitatani, Yuki Wakayama, Takafumi Taniguchi, Toshihiko Fukamachi, Yasushi Sakuma, Shigehisa TanakaAbstract:Direct Modulation at 56 Gb/s of 1.3-µm InGaAlAs-MQW DFB laser, incorporating a ridge-shaped buried heterostructure (RS-BH), operating at 55°C, is experimentally demonstrated for the first time.
-
40 gb s Direct Modulation with high extinction ratio operation of 1 3 mu m ingaalas multiquantum well ridge waveguide distributed feedback lasers
IEEE Photonics Technology Letters, 2007Co-Authors: Kouji Nakahara, Tsutomu Kikawa, M Aoki, T. Taniguchi, Kazunori Shinoda, T. Tsuchiya, Takeshi Kitatani, M. MukaikuboAbstract:Direct Modulation at 40 Gb/s of a 1.3-mum InGaAlAs distributed feedback ridge waveguide laser is experimentally demonstrated. By combination of the high differential gain of an InGaAlAs multiquantum well active layer, a short cavity length of 100 mum, and a low-resistance notch-free grating, it achieves high bandwidth of 29 GHz and high-extinction ratio of 5 dB at 40-Gb/s Modulation. Moreover, the laser operates at a record maximum ambient temperature of 60degC under 40-Gb/s Directly Modulation. It also achieves 40-Gb/s modulated transmission over 2 km with a low power penalty of 0.25 dB at 25degC .
-
high extinction ratio operation at 40 gb s Direct Modulation in 1 3 spl mu m ingaalas mqw rwg dfb lasers
Optical Fiber Communication Conference, 2006Co-Authors: Kouji Nakahara, Tsutomu Kikawa, M Aoki, T. Taniguchi, Kazunori Shinoda, T. Tsuchiya, Takeshi Kitatani, M. MukaikuboAbstract:Direct Modulation of 1.3-/spl mu/m InGaAlAs DFB RWG lasers at 40 Gb/s is experimentally demonstrated. This laser achieves a record extinction ratio of 5 dB under 40-Gb/s Modulation. Moreover, it can provide 40-Gb/s modulated transmission over 2 km.
-
12 5 gb s Direct Modulation up to 115 spl deg c in 1 3 spl mu m ingaalas mqw rwg dfb lasers with notch free grating structure
Optical Fiber Communication Conference, 2004Co-Authors: K Nakahara, Tsutomu Kikawa, T. Tsuchiya, Takeshi Kitatani, Takafumi Taniguchi, K Shinoda, Etsuko Nomoto, Sumiko Fujisaki, F Hamano, Mitsuhiro SawadaAbstract:Direct Modulation at 12.5 Gb/s of 1.3-/spl mu/m InGaAlAs distributed feedback (DFB) ridge waveguide (RWG) lasers with low-resistance notch-free gratings running up to 115/spl deg/C is experimentally demonstrated. It was achieved by the combination of the high differential gain of an InGaAlAs MQW active layer, high characteristic temperature of RWG structure, and low-resistance notch-free grating. Moreover, successful transmission of 10-Gb/s modulated signals over 30-km standard single-mode fiber was achieved with the laser running at up to 115/spl deg/C. These results confirm the suitability of this type of laser for use as the cost-effective light source in 12.5-Gb/s and 10-Gb/s datacom applications.
Hon Ki Tsang - One of the best experts on this subject based on the ideXlab platform.
-
investigation of 4 ask Modulation with digital filtering to increase 20 times of Direct Modulation speed of white light led visible light communication system
Optics Express, 2012Co-Authors: Chienhung Yeh, Y F Liu, Chiwai Chow, Yang Liu, P Y Huang, Hon Ki TsangAbstract:In this demonstration, we propose and experimentally investigate the quaternary-amplitude-shift-keying (4-ASK) Modulation with digital filtering to enhance the Direct Modulation speed of white-light light-emitting-diode (LED) in visible light communication (VLC) system. Here, an ordinary LED commercially available for lighting application with a Direct Modulation speed of 1 MHz is used. Data rate of 20 Mbit/s can be achieved in a 1 m free space transmission without using optical blue filter. In the previous studies, the transmission rate of LED VLC could only be increased by 2 to 10 times of the Direct Modulation speed of the white-light LED if using electrical equalization only. Moreover, the adaptive-controlled FIR filter makes the system closer to the matched filtering condition for reducing the inter-symbol-interference (ISI) for the LED VLC. A recorded 20 times enhancement of the Direct Modulation speed of white-light LED VLC system is demonstrated by using digital filter only and without using optical blue filter.
-
investigation of 4 ask Modulation with digital filtering to increase 20 times of Direct Modulation speed of white light led visible light communication system
Optics Express, 2012Co-Authors: C W Chow, P Y Huang, Hon Ki TsangAbstract:In this demonstration, we propose and experimentally investigate the quaternary-amplitude-shift-keying (4-ASK) Modulation with digital filtering to enhance the Direct Modulation speed of white-light light-emitting-diode (LED) in visible light communication (VLC) system. Here, an ordinary LED commercially available for lighting application with a Direct Modulation speed of 1 MHz is used. Data rate of 20 Mbit/s can be achieved in a 1 m free space transmission without using optical blue filter. In the previous studies, the transmission rate of LED VLC could only be increased by 2 to 10 times of the Direct Modulation speed of the white-light LED if using electrical equalization only. Moreover, the adaptive-controlled FIR filter makes the system closer to the matched filtering condition for reducing the inter-symbol-interference (ISI) for the LED VLC. A recorded 20 times enhancement of the Direct Modulation speed of white-light LED VLC system is demonstrated by using digital filter only and without using optical blue filter.
Gary Shambat - One of the best experts on this subject based on the ideXlab platform.
-
ultrafast Direct Modulation of a single mode photonic crystal nanocavity light emitting diode
Conference on Lasers and Electro-Optics, 2012Co-Authors: Gary Shambat, Bryan Ellis, Arka Majumdar, Jan Petykiewicz, Marie A Mayer, Tomas Sarmiento, J S Harris, E E Haller, Jelena VuckovicAbstract:We demonstrate an electrically driven single mode photonic crystal cavity LED with record speed of operation (10 GHz) and 0.25 fJ/bit energy consumption, the lowest of any optical transmitter to date.
-
ultrafast Direct Modulation of a single mode photonic crystal nanocavity light emitting diode
Nature Communications, 2011Co-Authors: Gary Shambat, Bryan Ellis, Arka Majumdar, Jan Petykiewicz, Marie A Mayer, Tomas Sarmiento, J S Harris, E E Haller, Jelena VuckovicAbstract:Photonic alternatives to electrical circuits require low energy demand and fast Modulation speed, which has proven difficult for on-chip devices. Using quantum dot photonic crystal nanocavities, Vuckovic et al. demonstrate an electrically-switchable light-emitting diode with such capabilities.