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Current injection tunable monolithically integrated InGaAs-InAlGaAs asymmetric Mach-Zehnder interferometer using quantum-well intermixing

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7 Author(s)
H. Y. Wong ; Dept. of Electron. & Electr. Eng., Univ. of Glasgow, UK ; W. K. Tan ; A. C. Bryce ; J. H. Marsh
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A compact highly efficient wavelength (de)multiplexer with channel spacing of 100 GHz has been realized with a monolithically integrated asymmetric 2 × 2 Mach-Zehnder interferometer using a single step sputtered SiO2-annealing quantum-well intermixing process. Wavelength tunability and asymmetric loss rebalancing of the device is demonstrated using current injection. Wavelength tuning over 0.8 nm is achieved with only 6 mA of injected current. An extinction ratio of more than 27 dB is obtained.

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