%0 Journal Article
%T Y coupled terahertz quantum cascade lasers
%A Owen P. Marshall
%A Subhasish Chakraborty
%A Md. Khairuzzaman
%A Harvey E. Beere
%A David A. Ritchie
%J Physics
%D 2012
%I arXiv
%X Here we demonstrate a Y coupled terahertz (THz) quantum cascade laser (QCL) system. The two THz QCLs working around 2.85 THz are driven by independent electrical pulsers. Total peak THz output power of the Y system, with both arms being driven synchronously, is found to be more than the linear sum of the peak powers from the individual arms; 10.4 mW compared with 9.6 mW (4.7 mW + 4.9 mW). Furthermore, we demonstrate that the emission spectra of this coupled system are significantly different to that of either arm alone, or to the linear combination of their individual spectra.
%U http://arxiv.org/abs/1206.0972v1