Multiple-quantum-well GaAs/AlGaAs in-line fiber intensity modulator

Erji Mao; Diego R. Yankelevich; Christopher W. Coldren; Olav Solgaard; Andre Knoesen; James S. Harris Jr.

doi:10.1117/12.379966

24 March 2000 Multiple-quantum-well GaAs/AlGaAs in-line fiber intensity modulator

Erji Mao, Diego R. Yankelevich, Christopher W. Coldren, Olav Solgaard, Andre Knoesen, James S. Harris Jr.

Proceedings Volume 3936, Integrated Optics Devices IV; (2000) https://doi.org/10.1117/12.379966
Event: Symposium on Integrated Optoelectronics, 2000, San Jose, CA, United States

Abstract

We demonstrate a GaAs/AlGaAs multiple-quantum-well in-line fiber optic intensity modulator. Based on evanescent wave coupling between a GaAs/AlGaAs anti-resonant reflective optical waveguide and a side-polished single mode fiber, this device concept combines the inherent advantages of in- line fiber devices with high-performance GaAs integrated optoelectronics. The GaAs waveguide utilizes distributed Bragg reflector mirrors, which are designed to provide maximum reflection at a given more angle, to phase-match to the low-index fiber. Intensity modulation of the transmitted light through the fiber is achieved by changing the complex propagation constant of the GaAs waveguide through the quantum-confined Stark effect. Typical device shows an on/off ratio of 4:1, with an applied voltage of 9V. Calculations show that with a longer interaction region, an on/off ratio of more than 40dB is achievable with the same applied voltage.

Citation Download Citation

Erji Mao, Diego R. Yankelevich, Christopher W. Coldren, Olav Solgaard, Andre Knoesen, and James S. Harris Jr. "Multiple-quantum-well GaAs/AlGaAs in-line fiber intensity modulator", Proc. SPIE 3936, Integrated Optics Devices IV, (24 March 2000); https://doi.org/10.1117/12.379966

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