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High Linearity InP-Based Phase Modulators Using a Shallow Quantum-Well Design

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5 Author(s)
Yifei Li ; Dept. of Electr. & Comput. Eng., Univ. of Massachusetts at Dartmouth, Dartmouth, MA, USA ; Renyuan Wang ; Bhardwaj, A. ; Ristic, S.
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Phase modulator nonlinearity is a major problem for implementing an optical phase-locked loop (OPLL) phase demodulator. In this letter, we report an improved InP phase modulator design that uses a detuned shallow multiquantum-well structure. The phase modulator shows high linearity and low optical loss. Its phase IP3 and optical loss per unit length are ~ 4 π/mm and ~ 0.9 dB/mm, respectively. This phase modulator design is thus suitable for implementing the OPLL linear phase demodulator.

Published in:

Photonics Technology Letters, IEEE  (Volume:22 ,  Issue: 18 )