Phase-locked arrays of surface-emitting graded-photonic-heterostructure terahertz semiconductor lasers |
Optics Express, Vol. 23, Issue 5, pp. 6915-6923 (2015)
http://dx.doi.org/10.1364/OE.23.006915
http://dx.doi.org/10.1364/OE.23.006915
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
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