"Babu Dayal Padullaparthi,Chang Ge,Liang Dong,Xiaodong Gu,Satoshi Shinada,Fumio Koyama","Long-reach, 50Gb/s NRZ transmission of uncooled 1060nm single-mode coupled cavity VCSELs","The 84th JSAP Autumn Meeting 2023",,,"  23a-A308-8",,,2023,Sept.
"Padullaparthi Babu Dayal,Takahiro Sakaguchi,Akihiro Matsutani,Fumio Koyama","Multiple-Wavelength Vertical-Cavity Surface-Emitting Lasers by Grading a Spacer Layer for Short-Reach Wavelength Division Multiplexing Applications",,"Appl. Phys. Exp.",,"vol. 2","no. 9",,2009,Aug.
"Babu Dayal,Fumio Koyama","Polarization control of 0.85ƒÊm vertical-cavity surface-emitting lasers integrated with gold nanorod arrays",,"Appl. Phys. Lett.",,"vol. 91",,"pp. 111107",2007,Nov.
"Padullaparthi Babu Dayal,Naoto Kitabayashi,Tomoyuki Miyamoto,Fumio Koyama,T. Kawashima,S. Kawakami","Polarization control of 1.15µm vertical-cavity surface-emitting lasers using autocloned photonic crystal polarizer",,"Appl. Phys. Lett.",,"vol. 91",,,2007,July
"Babu Dayal Padullaparthi,Koyama Fumio","Polarization Controlled 0.85 ƒÊm VCSELs with Plasmonic Nanorods","CLEO 2007","CLEO 2007",,,"  CThB2",,2007,Mar.
"P. Babu Dayal,Takashi Kawashima,Naoto Kitabayashi,Tomoyuki Miyamoto,Fumio Koyama,S. Kawakami","Polarization control of 1.2µm single-mode VCSELs using photonic crystal polarizer",""20th International Semiconductor Laser Conference, ISLC2006"",,,,,,2006,Sept.
"Jiro Hashizume,P. Babu Dayal,Fumio Koyama","Metal Nano-aperture VCSEL for Near-Field Optics and Polarization Control",,"20th International Semiconductor Laser Conference, ISLC2006",,,"  WB1","pp. 101-102",2006,Sept.