"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.
"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.
"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.
"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.