Abstract-Phase-locked arrays of surface-emitting graded-photonic-heterostructure terahertz semiconductor lasers

Phase-locked arrays of surface-emitting graded-photonic-heterostructure terahertz semiconductor lasers Yacine Halioua, Gangyi Xu, Souad Moumdji, Lianhe Li, Jingxuan Zhu, Edmund H. Linfield, A.Giles Davies, Harvey E. Beere, David A. Ritchie, and Raffaele Colombelli  »View Author Affiliations

http://www.opticsinfobase.org/oe/abstract.cfm?uri=oe-23-5-6915

Optics Express, Vol. 23, Issue 5, pp. 6915-6923 (2015)
http://dx.doi.org/10.1364/OE.23.006915

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We have demonstrated that a hybrid laser array, combining graded-photonic-heterostructure terahertz semiconductor lasers with a ring resonator, allows the relative phase (either symmetric or anti-symmetric) between the sources to be fixed by design. We have successfully phase-locked up to five separate lasers. Compared with a single device, we achieved a clear narrowing of the output beam profile.

© 2015 Optical Society of America