K. Makita et al., High-frequency response limitation of high-performance InAlGaAs/InAlAs superlattice avalanche photodiodes, ELECTR LETT, 35(25), 1999, pp. 2228-2229
InAlGaAs/InAlAs superlattice avalanche photodiodes (SL-APDs) have been inve
stigated for use in high bit rate optical communication systems. The high f
requency response limitation of high-performance InAlGaAs/InAlAs SL-APDs is
reported. For a thin avalanche layer of 0.126 mu m, a gain bandwidth produ
ct of 200GHz and a multiplied dark current of 700nA have been attained. The
se values are sustainable for use in practical systems at 20Gbit/s.