Dual function electroabsorption waveguide modulator/detector for photonic rf signal processing

Robert B. Welstand; Stephen A. Pappert; Chen Kuo Sun; Hao Jiang; Guoliang Li; Wei-Xi Chen; J. T. Zhu; Yet Zen Liu; Paul K. L. Yu

doi:10.1117/12.277627

1 July 1997 Dual function electroabsorption waveguide modulator/detector for photonic rf signal processing

Robert B. Welstand, Stephen A. Pappert, Chen Kuo Sun, Hao Jiang, Guoliang Li, Wei-Xi Chen, J. T. Zhu, Yet Zen Liu, Paul K. L. Yu

Author Affiliations +

Proceedings Volume 3075, Photonic Processing Technology and Applications; (1997) https://doi.org/10.1117/12.277627
Event: AeroSense '97, 1997, Orlando, FL, United States

Abstract

A Franz-Keldysh effect InGaAsP electroabsorption waveguide device is utilized as the high-frequency, high-linear dynamic range modulator and photodetector. The dual-function modulator/photodetector can be useful in compact transmit/receive front end antenna architectures. Adjusting the electrical bias to the reverse-biased p-i-n diode, either efficient optical modulation or detection is demonstrated. As an electroabsorption modulator, a fiber optic link with a minus 17.4 dB rf loss and a 124 dB-Hz^4/5 sub-octave spurious-free dynamic range is obtained with electrical biases in the 2 to 3 V range. As a waveguide photodetector, a 0.47 A/W fiber coupled responsivity, photocurrents up to 20 mA, and an output second-order intercept of plus 34.5 dBm are achieved at 7 V electrical bias. Supporting measurements on additional test devices show a trend toward larger intercept point with longer device lengths.

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Robert B. Welstand, Stephen A. Pappert, Chen Kuo Sun, Hao Jiang, Guoliang Li, Wei-Xi Chen, J. T. Zhu, Yet Zen Liu, and Paul K. L. Yu "Dual function electroabsorption waveguide modulator/detector for photonic rf signal processing", Proc. SPIE 3075, Photonic Processing Technology and Applications, (1 July 1997); https://doi.org/10.1117/12.277627

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