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Amplitude-modulation characteristics of barrier-reservoir and quantum-well electron-transfer (BRAQWET) modulators

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5 Author(s)
Freeman, P.N. ; Lucent Technol., AT&T Bell Labs., Murray Hill, NJ, USA ; Bhattacharya, Pallab ; Jaffe, Mark ; Singh, J.
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We have studied theoretically and experimentally the intensity-modulation characteristics of GaAs-based light modulators based on the barrier-reservoir and quantum-well electron-transfer (BRAQWET) structure. The transmission-voltage characteristics are nonlinear and follow an inverse exponential relationship which is derived herein. It is also seen that a multiple-period BRAQWET structure is unnecessary and partially ineffective for amplitude modulation and that a one-period BRAQWET structure can give comparable results while providing more versatility for the device design. AlxGa1-xAs-based guided-wave modulators are demonstrated with a 50% modulation index at a drive voltage of 1 V

Published in:

Quantum Electronics, IEEE Journal of  (Volume:32 ,  Issue: 7 )

Date of Publication:

Jul 1996

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