Long-Wavelength Photodetectors for Ultrawide-Band Systems

Kazutoshi KATO  

IEICE TRANSACTIONS on Electronics   Vol.E79-C   No.1   pp.14-20
Publication Date: 1996/01/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: INVITED PAPER (Special Issue on Optomicrowave Techniques and Their Applications)
Category: Optomicrowave Devices
p-i-n photodetector,  waveguide,  long wavelength,  

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Performances of photodetectors for ultrawide-band systems are outlined. Among several kinds of long-wavelength photodetectors, the waveguide p-i-n photodetector has achieved the largest bandwidth-efficiency product by using two designs: a multimode waveguide and a mushroom structures. The ultrawide-band high-efficiency operation of this photodiode has enabled the construction of a wide-band receiver opto-electronic integrated circuit and has made possible such novel system applications as 20-Gbit/s optical digital transmission using an Er-doped fiber amplifier and a 72-Gbit/s optoelectronic pulse-pattern generator.