title: 1.3-μm, 4 × 25-Gbit/s, EADFB laser array module with large-output-power and low-driving-voltage for energy-efficient 100GbE transmitter.
abstract: A 1.3-μm, 4 × 25-Gbit/s, EADFB laser array module with large output power and low driving voltage is developed for 100GbE. A novel rear grating DFB laser is introduced to increase the output power of the laser while keeping the single mode lasing, which is desirable for a monolithic integration. Also, InGaAlAs-based electroabsorption modulators make very-low-driving-voltage operation possible due to their steep extinction curves. With the module, very clear 25-Gbit/s eye openings are obtained for four wavelengths with the driving voltage of only 0.5 V while securing the dynamic extinction ratio required by the system. These results indicate that the presented module is a promising candidate for energy-efficient future 100GbE transmitter.
authors.affiliation: NTT Photonics Laboratories, NTT Corporation, Morinosato Wakamiya, 3-1, Atsugi, Kanagawa, 243-0198, Japan. fujisawa.takeshi@lab.ntt.co.jp
authors.forename: Takeshi
authors.initials: T
authors.lastname: Fujisawa
authors.forename: Shigeru
authors.initials: S
authors.lastname: Kanazawa
authors.forename: Kiyoto
authors.initials: K
authors.lastname: Takahata
authors.forename: Wataru
authors.initials: W
authors.lastname: Kobayashi
authors.forename: Takashi
authors.initials: T
authors.lastname: Tadokoro
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Ishii
authors.forename: Fumiyoshi
authors.initials: F
authors.lastname: Kano
mesh_terms: D011211:Electric Power Supplies; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007834:Lasers; D008872:Microwaves; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*; D013685:Telecommunications / Q000295:instrumentation*