Abstract

A polarization-insensitive quantum dot semiconductor optical amplifiers (QD-SOAs) have been studied for use in future optical communication systems. A part of our work shows that the optical polarization property in QDs depends on both their aspect ratio and strain. To control these two parameters, we propose the use of strain-controlled columnar QDs (SC-CQDs), which exhibit a high aspect ratio and have strain-controlled side barriers for polarization-insensitive operation in the 1.5-μm wavelength band. QD-SOAs with these optimized SC-CQDs demonstrated polarization-insensitive characteristics. They showed a gain of 8.0 dB with polarization dependence of the gain as low as 0.4 dB, -3-dB saturation output power of 18.5 dBm at a wavelength of 1550 nm, and error-free amplification at a bit rate of 40 Gbit/s.

© 2011 IEEE

Coherent control in room-temperature quantum dot semiconductor optical amplifiers using shaped pulses

O. Karni, A. K. Mishra, G. Eisenstein, V. Ivanov, and J. P. Reithmaier
Optica 3(6) 570-576 (2016)

Theoretical study of polarization dependence of carrier-induced refractive index change of quantum dot

Qingyuan Miao, Ziyi Yang, Jianji Dong, Ping-An He, and Dexiu Huang
Opt. Express 26(3) 2252-2260 (2018)

Quantum control study of ultrafast optical responses in semiconductor quantum dot devices

Jung Y. Huang, Chien Y. Lin, Wei-Sheng Liu, and Jen-Inn Chyi
Opt. Express 22(25) 30815-30825 (2014)

Enhancement of gain recovery rate and cross-gain modulation bandwidth using a two-electrode quantum-dot semiconductor optical amplifier

Yu Yi, Huang Lirong, Xiong Meng, Tian Peng, and Huang Dexiu
J. Opt. Soc. Am. B 27(11) 2211-2217 (2010)

Four-wave mixing in quantum dot semiconductor optical amplifiers

Ahmed H. Flayyih and Amin H. Al-Khursan
Appl. Opt. 52(14) 3156-3165 (2013)