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Peripheral-coupled-waveguide MQW electroabsorption modulator for near transparency and high spurious free dynamic range RF fiber-optic link

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3 Author(s)
Yuling Zhuang ; Dept. of Electr. & Comput. Eng., Univ. of California, La Jolla, CA, USA ; Chang, W.S.C. ; Yu, P.K.L.

Peripheral coupled waveguide (PCW) design has been deployed in InGaAsP multiple quantum-well (MQW) electroabsorption modulator (EAM) at 1.55-μm wavelength. PCW enhances the optical saturation power and reduces the optical insertion loss and the equivalent V/sub /spl pi// simultaneously. A radio-frequency link using a 1.3-mm-long lumped-element PCW EAM has achieved experimentally a link gain of -3 dB, at 500 MHz and at input optical power of 80 mW. The corresponding two-tone multioctave spurious-free dynamic range (SFDR) at the same bias is measured at 118 dB/spl middot/Hz23/. The single-octave SFDR at the third-order null bias is 132 dB/spl middot/Hz45/.

Published in:

Photonics Technology Letters, IEEE  (Volume:16 ,  Issue: 9 )