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| 1 | Laparoscopic partial resection for hemangioma in the third portion of the duodenum显示文摘Benign duodenal tumors are rare and less commonthan malignant tumors.Furthermore,vascular lesionsof the duodenum,including hemangiomas,are rarecauses of gastrointestinal bleeding.This report describes a case with bleeding hemangiomas in the thirdportion of the duodenum and jejunum and their successful treatment using a laparoscopic approach.Thereis no report of totally laparoscopic resection for tumorin the third portion of duodenum.After performinga laparoscopic Kocher maneuver,the location of theduodenal hemangioma was confirmed by endoscopicand laparoscopic observation.The lesion was excisedusing ultrasonic coagulating shears and the defect inthe duodenal wall was sutured laparoscopically.Thehemangioma of the jejunum was treated extracorporeally through a 3.0 cm umbilical incision.The operatingtime was 241 min and blood loss was negligible.Thepostoperative course was uneventful.For benign duodenal tumors in the third portion,if endoscopic resection is not adapted,this less invasive technique may be a standard treatment. | Shingo Kanaji Tetsu Nakamura Masayasu Nishi Masashi Yamamoto Kiyonori Kanemitu Kimihiro Yamashiita Tatsuya Imanishi Yasuo Sumi Satoshi Suzuki Kenichi Tanaka Yoshihiro Kakeji | 2014 | World Journal of Gastroenterology2014，20，34： | 2 |
| 2 | Ground-state Lasing at Room Temperature in Long-wavelength InAs QRantum-dot Lasers on InP(311)B Substrates显示文摘 | HIDEAKI SAITO KENICHI NISHI SIGEO SUGOU | 2001 | Appl Phys Lett2001，78，： | 1 |
| 3 | Critical layer thickness on (111) B-oriented InGaAs/GaAs heteroepitaxy显示文摘 | Takayoshi Anan Kenichi Nishi Sigeo Sugou | 1992 | Appl Phys Lett1992，60，25： | 1 |
| 4 | Dynamic performance and reflection sensitivity of quantum dot distributed feedback lasers with large optical mismatch显示文摘This work reports on a high-efficiency In As/Ga As distributed feedback quantum dot laser.The large optical wavelength detuning at room temperature between the lasing peak and the gain peak causes the static,dynamic,and nonlinear intrinsic properties to all improve with temperature,including the lasing efficiency,the modulation dynamics,the linewidth enhancement factor,and consequently the reflection insensitivity.Results reported show an optimum operating temperature at 75°C,highlighting the potential of the large optical mismatch assisted single-frequency laser for the development of uncooled and isolator-free high-speed photonic integrated circuits. | BOZHANG DONG JIANAN DUAN HEMING HUANG JUSTIN CNORMAN KENICHI NISHI KEIZO TAKEMASA MITSURU SUGAWARA JOHN EBOWERS FRéDéRIC GRILLOT | 2021 | Photonics Research2021，9，8： | 1 |
| 5 | Quantum dot mode-locked frequency comb with ultra-stable 25.5 GHz spacing between 20℃ and 120℃显示文摘Semiconductor mode-locked lasers(MLLs)are promising frequency comb sources for dense wavelength-divisionmultiplexing(DWDM)data communications.Practical data communication requires a frequency-stable comb source in a temperature-varying environment and a minimum tone spacing of 25 GHz to support high-speed DWDM transmissions.To the best of our knowledge,however,to date,there have been no demonstrations of comb sources that simultaneously offer a high repetition rate and stable mode spacing over an ultrawide temperature range.Here,we report a frequency comb source based on a quantum dot(QD)MLL that generates a frequency comb with stable mode spacing over an ultrabroad temperature range of 20–120℃.The two-section passively mode-locked In As QD MLL comb source produces an ultra-stable fundamental repetition rate of 25.5 GHz(corresponding to a 25.5 GHz spacing between adjacent tones in the frequency domain)with a variation of 0.07 GHz in the tone spacing over the tested temperature range.By keeping the saturable absorber reversely biased at-2 V,stable mode-locking over the whole temperature range can be achieved by tuning the current of the gain section only,providing easy control of the device.At an elevated temperature of 100℃,the device shows a 6 d B comb bandwidth of 4.81 nm and 31 tones with>36 d B optical signal-to-noise ratio.The corresponding relative intensity noise,averaged between 0.5 GHz and 10 GHz,is-146 d Bc∕Hz.Our results show the viability of the In As QD MLLs as ultra-stable,uncooled frequency comb sources for low-cost,large-bandwidth,and low-energy-consumption optical data communications. | SHUJIE PAN JIANOU HUANG ZICHUAN ZHOU ZHIXIN LIU LALITHA PONNAMPALAMZIZHUO LIU MINGCHU TANG MU-CHIEH LO ZIZHENG CAO KENICHI NISHI KEIZO TAKEMASA MITSURU SUGAWARA RICHARD PENTY IAN WHITE ALWYN SEEDS HUIYUN LIU SIMING CHEN | 2020 | Photonics Research2020，8，12： | 0 |
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