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Velocity-matched distributed photodetectors and balanced photodetectors with p-i-n photodiodes

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8 Author(s)
Islam, M.S. ; Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA ; Murthy, S. ; Itoh, T. ; Wu, M.C.
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We report on the first demonstration of velocity-matched distributed photodetectors and balanced photodetectors with p-i-n photodetectors. Record-high linear dc photocurrent of 45 mA has been achieved without suffering from thermal damage, thanks to the superior power handling capability of p-i-n photodiodes. A novel fiber alignment technique has been developed to achieve high linear photocurrent. More than 37 dB of common-mode-rejection ratio and 45-dB suppression of laser relative intensity noise over a broad frequency range have been achieved using the distributed balanced photodetectors in an RF fiber-optic link. The frequency response is flat from 1 to 35 GHz

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:49 ,  Issue: 10 )