Monolithically integrated 4 ch × 25.8 Gbps lens-integrated surface-emitting DFB laser array directly coupled to SMF
['Koichiro Adachi', 'Takanori Suzuki', 'Aki Takei', 'Kouji Nakahara', 'Shigehisa Tanaka', 'Akira Nakanishi', 'Kazuhiko Naoe']
Monolithically integrated 4 ch × 25.8 Gbps lens-integrated surface-emitting DFB laser array directly coupled to SMF