We present a highly reproducible method of producing terahertz (THz) optical pulses using a class of mode-locked AlGaInAs/InP laser operating in the 1.55 μm wavelength range. The device uses a sample grating distributed Bragg reflector to provide strong frequency selectivity at the mode-locked frequency while the distributed reflectors relax the fabrication tolerances and ensure the cavity can self adjust to being an integral number of mode-locked periods in length. The measured devices provide nearly transform-limited pulse trains at 640 GHz or 1.28 THz with a high degree of controllability and operate with consistent performance over a wide range of drive conditions. Being low cost and compact sources of THz radiation, these lasers will open up many applications, including systems for high-speed optical communication and THz imaging.
© 2013 Optical Society of AmericaFull Article | PDF Article
Lianping Hou, Mohsin Haji, Jehan Akbar, Bocang Qiu, and A. Catrina Bryce
Opt. Lett. 36(6) 966-968 (2011)
Jehan Akbar, Lianping Hou, Mohsin Haji, Michael J. Strain, John H. Marsh, A. Catrina Bryce, and Anthony E. Kelly
Opt. Lett. 37(3) 344-346 (2012)
Lianping Hou, Mohsin Haji, John H. Marsh, and A. Catrina Bryce
Opt. Lett. 37(5) 773-775 (2012)