Title :
For 40 Gb/s, make mine a double [double-stage tapered photodiodes]
Author :
Demiguel, Stéphane ; Giraudet, Louis
Author_Institution :
ALCATEL OPTO+, Marcoussis, France
fDate :
3/1/2003 12:00:00 AM
Abstract :
After describing the design of double-stage tapered photodiodes (DSTPs), the optical simulation method was explained in detail. The calculated responsivity takes into account losses linked to materials and technology, and it is obtained by 2-D modal and 3-D-BPM computations. The modeling was validated by measurements, showing a responsivity as high as 0.6 A/W and low polarization dependence, below 0.2 dB. Exhibiting high-frequency characteristics (>40 GHz) and high-power handling capabilities (> +14 dBm), this component can be used with lensed fiber as well as cleaved fiber without significant penalty. The consequence is that the DSTP is suitable for 40 Gb/s optical transmission requiring performance and radio-over-fiber applications demanding low-cost packaging.
Keywords :
integrated optoelectronics; optical communication equipment; optical waveguides; photodiodes; semiconductor device packaging; 2D modal computations; 3D BPM computations; 40 Gbit/s; Gbit/s optical transmission; cleaved fiber use; double-stage tapered photodiodes; high-frequency characteristics; high-power handling capabilities; lensed fiber use; losses; low polarization dependence; optical simulation method; radio-over-fiber applications; responsivity; waveguide; Bandwidth; Batteries; High speed optical techniques; Optical coupling; Optical polarization; Optical surface waves; Optical waveguides; Packaging; Photodiodes; Tellurium;
Journal_Title :
Circuits and Devices Magazine, IEEE
DOI :
10.1109/MCD.2003.1191437
