Abstract
We clarified experimentally that an EA-DFB laser in which the EAM and DFB parts are coupled with a passive waveguide provides a large bandwidth, even when a large reverse bias is applied to the EAM. This allows the chip to operate in a negative-chirp condition. We fabricated an EA-DFB module terminated with a 50 Ω resistor through a dc-block capacitor to suppress the increase in dc current as the reverse bias increases. A module equipped with our new EA-DFB chip successfully transmitted data over a distance of 3 km at a rate of 40 Gbit/s and at a driving voltage as low as 2 V.
Original language | English |
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Pages (from-to) | 1129-1134 |
Number of pages | 6 |
Journal | IEEE Journal on Selected Topics in Quantum Electronics |
Volume | 13 |
Issue number | 5 |
DOIs | |
Publication status | Published - 2007 Sept |
Externally published | Yes |
Keywords
- DFB laser
- Electroabsorption
- Electroabsorption modulator (EAM)
- Electroabsorption modulator integrated DFB laser (EA-DFB)
- Low driving voltage
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Electrical and Electronic Engineering