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GaInAs/InP waveguide multiple-quantum-well optical modulator with 9 dB on/off ratio

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4 Author(s)
Wakita, K. ; NTT Electrical Communications Laboratories, Atsugi, Japan ; Nojima, S. ; Nakashima, K. ; Kawaguchi, Y.

Clear excitonic peak wavelength shifts are obtained with an applied electric field and large on/off ratio optical modulation of long-wavelength light propagating along the plane of GaInAs/InP multiple-quantum-well (MQW) structures grown by metalorganic molecular beam epitaxy (MOMBE). These waveguide MQW optical modulators have a modulation on/off ratio of 8:1 (9 dB) at a driving voltage as low as 5 V operating at a wavelength of 1.55 ¿m. This measurement is the first step towards faster and higher extinction ratio devices.

Published in:

Electronics Letters  (Volume:23 ,  Issue: 20 )