Proposal for common active 1.3-μm quantum dot electroabsorption modulated DFB laser

Sobhani, S. A. , Stevens, B. J., Babazadeh, N., Takemasa, K., Nishi, K., Sugawara, M., Hogg, R. A. and Childs, D. T.D. (2019) Proposal for common active 1.3-μm quantum dot electroabsorption modulated DFB laser. IEEE Photonics Technology Letters, 31(6), pp. 419-422. (doi:10.1109/LPT.2018.2890641)

Sobhani, S. A. , Stevens, B. J., Babazadeh, N., Takemasa, K., Nishi, K., Sugawara, M., Hogg, R. A. and Childs, D. T.D. (2019) Proposal for common active 1.3-μm quantum dot electroabsorption modulated DFB laser. IEEE Photonics Technology Letters, 31(6), pp. 419-422. (doi:10.1109/LPT.2018.2890641)

Full text not currently available from Enlighten.

Abstract

Opportunities for the monolithic integration of a novel common quantum dot (QD)-active electroabsorption modulated laser are explored. An electric-field and temperature-dependent spectroscopic study of optical absorption and gain are presented in the state-of-the-art 1.3-μm In(Ga)As/GaAs QD active material. The unique gain/absorption spectral shape, attributed to the QD's density of states, allows for a number of possible modulation schemes dependent upon the selected laser wavelength detuning from the gain peak. Intensity modulation and change in absorption, leading to negative chirp operation, are demonstrated via absorption spectroscopy and gain measurement of eight-layer-stack QD-active material. Such a device would be able to provide positive or negative chirp dependent upon modulation scheme and gain/Bragg wavelength detuning.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Ali Sobhani, Mr Soroush and Childs, Dr David and Hogg, Professor Richard and Babazadeh, Dr Nasser
Authors: Sobhani, S. A., Stevens, B. J., Babazadeh, N., Takemasa, K., Nishi, K., Sugawara, M., Hogg, R. A., and Childs, D. T.D.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:IEEE Photonics Technology Letters
Publisher:IEEE
ISSN:1041-1135
ISSN (Online):1941-0174
Published Online:01 January 2019

University Staff: Request a correction | Enlighten Editors: Update this record