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Open Access Publications from the University of California

0.2 v Drive voltage substrate removed electro-optic mach-zehnder modulators with MQW cores at 1.55 μm

  • Author(s): Dogru, S
  • Dagli, N
  • et al.

Novel electro-optic modulators in compound semiconductor epilayers using substrate removal techniques are reported. Epilayer consists of a p-i-n junction in which i layer is composed of an InGaAlAs/InAlAs MQW. This creates an optical mode with very strong vertical confinement and overlapping very well with the large electric field of the reverse biased p-i-n junction. This approach combined with the large quadratic electro-optic coefficient due to MQW improves efficiency of modulation significantly. Mach-Zehnder electro-optic modulators fabricated using this approach has 0.2 V (0.6 V) V π for 3 (1) mm long electrodes at 1.55 μm under push pull drive corresponding to record modulation efficiency of 0.06 V·cm. © 2013 IEEE.

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