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Optical Networking White Papers

Novel Segmented Cascade Electroabsorption Modulator With Improved Bandwidth-Extinction Product

Tags:
optical networking

Overview Standard lumped-element Electroabsorption Modulators (EAMs) are the workhorse of InP integrated modulation, due to their simple operation and small size. A short length of passive waveguide is appended to a laser or other photonic circuit, and driven with a variable negative voltage. A voltage-dependent Franz-Keldysh absorption, modulates the optical input. A large digital extinction ratio can be achieved either by swinging a large voltage, biasing at a more negative voltage, or using a longer modulator. While the first solution may be practical (up to a point!) in some applications, it can be very difficult to generate a large voltage on-chip in integrated circuits, as will be discussed in this paper.

Further White Paper Details
Publisher	Optical Society of America	File Format	PDF
Date Published	December 2005
Format	White Papers
Topics	Optical Networking, Bandwidth Issues

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