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Lossless electroabsorption modulator monolithically integrated with a semiconductor optical amplifier and dual-waveguide spot-size converters

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6 Author(s)
Lianping Hou ; Nat. Res. Center for Optoelectron. Technol., Chinese Acad. of Sci., Beijing, China ; Hongliang Zhu ; Fan Zhou ; Lufeng Wang
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Semiconductor optical amplifier and electroabsorption modulator monolithically integrated with dual-waveguide spot-size converters at the input and output ports is demonstrated by means of selective area growth, quantum-well intermixing, and asymmetric twin waveguide technologies. At the wavelength range of 1550∼1600 nm, lossless operation with extinction ratios of 25-dB dc and 11.8-dB radio frequency and more than 10-GHz 3-dB modulation bandwidth is successfully achieved. The output beam divergence angles of the device in the horizontal and vertical directions are as small as 7.3°×10.6°, respectively, resulting in 3.0-dB coupling loss with cleaved single-mode optical fiber.

Published in:

IEEE Photonics Technology Letters  (Volume:17 ,  Issue: 8 )