"Hameeda R Ibrahim,Ahmed H. Hassan,Xiaodong Gu,Moustafa Ahmed,Fumio Koyama","Enhanced High-Frequency Modulation of Single-mode 850 nm VCSELs via Dual Transverse-Cavity Integration",,"IEICE Electronics Express",,"Vol. 21","No. 4","pp. 1-4",2024,Feb.
"Hameeda R Ibrahim,Xiaodong Gu,Ahmed M. A. Hassan,Satoshi Shinada,Moustafa Ahmed,Fumio Koyama","Single-Mode 1060nm Bottom Emitting Metal Aperture VCSEL Array for Co-Packaged Optics","CLEO 2022",,,"  STu5E.6 (2022)",,,2022,May
"Hameeda R Ibrahim,Ahmed MA Hassan,Xiaodong Gu,Moustafa Ahmed,Fumio Koyama","Static and dynamic characteristics of double transverse coupled cavity VCSELs for high speed modulations",,"IEICE Electronics Express","The Institute of Electronics, Information and Communication Engineers","Vol. 18","No. 22","p. 20210419",2021,Nov.
"Ahmed M. A. Hassan,Xiaodong Gu,Masanori Nakahama,Satoshi Shinada,Moustafa Ahmed,Fumio Koyama","High-power operations of single-mode surface grating long oxide aperture VCSELs",,"Applied Physics Letters",,"  119, 191103-8 (2021)",,,2021,Nov.
"Hameeda R Ibrahim,Ahmed M. A. Hassan,Xiaodong Gu,Satoshi Shinada,Moustafa Ahmed,Fumio Koyama","Low power consumption 1060 nm single-mode intracavity metal aperture VCSEL with transverse resonance","27th International Semiconductor Laser Conference",,,,,,2021,Oct.
"H. R Ibrahim,Ahmed M. A. Hassan,Xiaodong Gu,Satoshi Shinada,M. Ahmed,F. Koyama","1060nm Single-mode Metal-aperture VCSEL Array with Transverse Resonance and Low Power Consumption below 50 fJ/bit","2021 European Conference on Optical Communication",,,"  Tu3D.5",,,2021,Sept.
"Ahmed Mohamed Ahmed Hassan,X. Gu,M. Nakahama,M. Ahmed,F. Koyama","Record High Power Single-Mode Operations of Surface Grating VCSELs","The 82nd JSAP Autumn Meeting, 2021","第82回応用物理学会秋季学術講演会 講演予稿集","The Japan Society of Applied Physics","  10a-N405-7",,,2021,Sept.
"Hameeda Ibrahim,Ahmed Hassan,Gu Xiaodong,Satoshi Shinada,Moustafa Ahmed,Fumio Koyama","Record Low Power Consumption 1060nm Single-mode Intracavity Metal Aperture VCSEL with Transverse Resonance","The 82nd JSAP Autumn Meeting, 2021",,,"  10a-N405-9",,,2021,Sept.
"H. R. Ibrahim,A. M. A. Hassan,M. Ahmed,F. Koyama","Optical feedback tolerance of transverse coupled cavity VCSELs","26th MICROOPTICS CONFERENCE",,,"  PO-33",,,2021,Sept.
"Ahmed M. A. Hassan,Xiaodong Gu,Masanori Nakahama,Satoshi Shinada,Moustafa Ahmed,Fumio Koyama","High power surface grating slow-light VCSEL",,"Appl. Phys. Express",,"Vol. 14","  092006","pp. 1-6",2021,Aug.
"Hameeda R Ibrahim,Ahmed Hassan,Xiaodong Gu,Satoshi Shinada,Moustafa Ahmed,Fumio Koyama","1060nm single-mode metal aperture VCSEL array with  transverse resonance for 5km single-mode fiber transmission","Optical Fiber Communication Conference 2021 (OFC2021 Vertual)",,,"  Tu5C.1",,,2021,June
"H. R Ibrahim,A. Hassan,M. Ahmed,X. Gu,F. Koyama","50Gbps Single Mode 1060nm Intracavity Metal Aperture VCSEL With Transverse Resonance","Conference on Lasers and Electro-Optics(CLEO 2021 Virtual)",,,"  SF2F.6",,,2021,May
"Ahmed M.A Hassan,Xiaodong Gu,Masanori Nakahama,Fumio Koyama,Satoshi Shinada,Moustafa Ahmed","High power and high beam quality surface grating VCSEL","Conference on Lasers and Electro-Optics(CLEO2021 virtual)",,,"  STh1G.5",,,2021,May
"Ahmed Mohamed Ahmed Hassan,Xiaodong Gu,Masanori Nakahama,Moustafa Ahmed,Fumio Koyama","High power surface grating long aperture VCSEL","第68回応用物理学会春季学術講演会(2021 オンライン開催)","第68回応用物理学会春季学術講演会 講演予稿集","The Japan Society of Applied Physics","  19p-Z22-2",,,2021,Mar.
"H. R. Ibrahim,Ahmed M. A. Hassan,M. Ahmed,F. Koyama","Single-mode and High-speed Intracavity Metal Aperture VCSEL with Transverse Coupled Cavity Effect","The 46th European Conference on Optical Communication",,,,,,2020,Dec.
"Ahmed Mohamed Ahmed Hassan,Moustafa Ahmed,Masanori Nakahama,FUMIO KOYAMA","High power, high speed pulse generation of VCSEL amplifier","The 80th JSAP Autumn  Meeting, 2019","第80回応用物理学会秋季学術講演会 講演予稿集",,"  20a-E302-7",,,2019,Sept.
"Hameeda Ibrahim,Moustafa Ahmed,FUMIO KOYAMA","High-speed Double Transverse Coupled Cavity VCSELs","The 80th JSAP Autumn  Meeting, 2019","第80回応用物理学会秋季学術講演会 講演予稿集",,"  20a-E302-6",,,2019,Sept.
"Hameeda Ibrahim,M. Ahmed,F. Koyama","Modeling of Large Signal Modulation Analysis of High-speed Transverse Coupled Cavity VCSELs","The 65th JSAP Spring Meeting, 2018",,,"  17p-A404-10",,,2018,Mar.
"Hameeda Ibrahim,Fumio Koyama,Moustafa Ahmed","Large Signal Modultion Analysis Of High-speed Transverse Coupled Cavity VCSELs","The 12th Conference on Lasers and Electro-Optics Pacific Rim",,,"  1-4N-6",,,2017,Aug.
"Hameeda R Ibrahim,M. Ahmed,Fumio Koyama","Enhancing the modulation bandwidth of double transverse coupled cavity VCSELs","The 64rd JSAP Spring Meeting,2017",,,"  15p-422-7",,,2017,Mar.
"Ahmed M. A. Hassan,M. Ahmed,Masanori Nakahama,Fumio Koyama","Numerical analysis of high output slow light VCSEL amplifier","The 64rd JSAP Spring Meeting,2017",,,"  15p-422-2",,,2017,Mar.
"Hideaki Yamakawa,Takahiro Sakaguchi,Moustafa Ahmed,Ahmed Bakry,Fumio Koyama","Spatial-mode multiplexer/demultiplexer based on tapered hollow waveguide with lateral optical confinement",,"Japanese Journal of Applied Physics",,"Vol. 54",,"pp. 120302-1-3",2015,Dec.
"Hameeda Ragab Ibrahim,Moustafa Ahmed,Fumio Koyama","Influence of slow-light feedback on noise properties of VCSEL with a transverse coupled cavity","20th Microoptics Conference 2015, MOC 2015",,,"  H3",,"pp. 26-28",2015,Oct.
"Shanting Hu,Moustafa Ahmed,Ahmed Bakry,Fumio Koyama","Low chirp and high-speed operation of transverse coupled cavity VCSEL",,"Japanese Journal of Applied Physics",,"vol. 54","no. 9","pp. 090304-1-4",2015,Aug.
"Masanori Nakahama,Xiaodong Gu,Takahiro Sakaguchi,Akihiro Matsutani,Moustafa Ahmed,Ahmed Bakry,Fumio Koyama","Sub-gigahertz beam switching of vertical-cavity surface-emitting laser with transverse coupled cavity",,"Applied Physics Letters",,"Vol. 107","No. 7","pp. 071105-1-4",2015,Aug.
"Hameeda R. Ibrahim,Moustafa Ahmed,Fumio Koyama","Modeling of Dynamics and Intensity Noise of Transverse Coupled Cavity VCSELs","International Nano-Optoelectronics Workshop",,,"  TuP15",,"pp. 60-61",2015,Aug.
"Xiaodong Gu,Masanori Nakahama,Akihiro Matsutani,Moustafa Ahmed,Ahmed Bakry,Fumio Koyama","850nm transverse-coupled-cavity vertical-cavity surface-emitting laser with direct modulation bandwidth of over 30GHz",,"Applied Physics Express",,"vol. 8","no. 8","pp. 82702-1-4",2015,July
"Moustafa Ahmed,Ahmed Bakry,Mohamed S. Alghamdi,Hamed Dalir,Fumio Koyama","Enhancing the modulation bandwidth of VCSELs to the millimeter-waveband using strong transverse slow-light feedback",,"OPTICS EXPRESS",,"Vol. 23","No. 12","pp. 15365-15371",2015,June
"Moustafa Ahmed,Ahmed Bakry,Hamed Dalir,Fumio Koyama","Application of Strong Slow-Light Feedback to Boost the Modulation Bandwidth of VCSELs Beyond 70 GHz","Conference on Lasers and Electro-Optics 2015, CLEO2015",,,"  SM3F.6",,,2015,May
"Moustafa Ahmed,Ahmed Bakry,Fumio Koyama","Application of Strong Optical Feedback to Enhance the Modulation Bandwidth of Semiconductor Lasers to the Millimeter-Wave Band",,"International Science Index 2015",,"Vol. 9","No. 1","pp. 17-22",2015,Jan.
"Hamed Dalir,Moustafa Ahmed,Ahmed Bakry,Fumio Koyama","Compact electro-absorption modulator integrated with vertical-cavity surface-emitting laser for highly efficient millimeter-wave modulation",,"Applied Physics Letters(APL)",,"vol. 105","no. 081113 (2014)","pp. 081113-1-5 (2014)",2014,Aug.
"Kensuke Nakamura,Akihiro Matsutani,Moustafa Ahmed,Ahmed Bakry,Fumio Koyama","Slow-light Bragg reflector waveguide array for two-dimensional beam steering",,"Japanese Journal of Applied Physics",,"Vol. 53","No. 3","pp. 038001-1-3",2014,Jan.
"Shota Mochizuki,Xiaodong Gu,Kenji Tanabe,Akihiro Matsutani,Moustafa Ahmed,Ahmed Bakry,Fumio Koyama","Generation of vortex beam using Bragg reflector waveguide",,"Applied Physics Express(APEX)",,"vol. 7","no. 2","pp. 022502-1-3",2014,Jan.
"Xiaodong Gu,Masanori Nakahama,Moustafa Ahmed,Ahmed Bakry,Fumio Koyama","Beam-steering in hollow ZrO2/SiO2 distributed Bragg reflector waveguides for one-dimensional RGB imaging",,"Japanese Journal of Applied Physics",,"Vol. 53","No. 3","pp. 030302-1-3",2014,Jan.
"Masanori Nakahama,Hayato Sano,Shunya Inoue,Takahiro Sakaguchi,Akihiro Matsutani,Moustafa Ahmed,Ahmed Bakry,Fumio Koyama","Wavelength tuning and controlled temperature dependence in vertical-cavity surface-emitting lasers with a thermally and electrostatically actuated cantilever structure",,"Jpn. J. Appl. Phys.",,"vol. 53","no. 1","pp. 010303-1-3",2013,Dec.
"Ayumi Fuchida,Akihiro Matsutani,Moustafa Ahmed,Ahmed Bakry,Fumio Koyama","Low-polarization dependent thermo-optic phase-shift in slow light Bragg reflector waveguide for beam steering and optical switching",,"Jpn. J. Appl. Phys.",,"vol. 53","no. 1","  010306-1-3",2013,Dec.