High Output Saturation and High-Linearity Uni-Traveling-Carrier Waveguide Photodiodes |
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| Authors: | Klamkin J. Ramaswamy A. Johansson L. A. Chou H.-F. Sysak M. N. Raring J. W. Parthasarathy N. DenBaars S. P. Bowers J. E. Coldren L. A. |
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| Affiliation: | Dept. of Electr. & Comput. Eng., California Univ., Santa Barbara, CA; |
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| Abstract: | Waveguide uni-traveling-carrier photodiodes (UTC-PDs) have been fabricated and tested. Output saturation currents greater than 40 mA at 1 GHz are demonstrated for a 10 mumtimes150mum photodiode (PD). The third-order intermodulation distortion is also measured and exhibits a third-order output intercept point of 43 dBm at 20 mA and 34 dBm at 40 mA for this same PD. UTC-PDs with geometries of 5 mumtimes100 mum and 10 mumtimes100 mum are also compared and it is shown that a wider waveguide PD has improved saturation characteristics due to the lower optical power density which reduces the saturation at the front end of the device |
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