Abstract

We demonstrate a frequency tunable external cavity terahertz quantum cascade laser using an abutted antireflection-coated silicon lens to reduce facet reflection and as a beam-forming element, with an external grating providing frequency selective optical feedback. Angle tuning of the grating allows a single longitudinal mode of the laser ridge to be selected, resulting in discontinuous tuning over a 165 GHz range around a center frequency of 4.4 THz. Another device exhibited 145 GHz of total tuning with 9 GHz of continuous tuning near the longitudinal modes of the laser.

© 2010 Optical Society of America

Continuous-wave operation of a broadly tunable thermoelectrically cooled external cavity quantum-cascade laser

Richard Maulini, Dmitri A. Yarekha, Jean-Marc Bulliard, Marcella Giovannini, Jérôme Faist, and Emilio Gini
Opt. Lett. 30(19) 2584-2586 (2005)

Mid-infrared external-cavity quantum-cascade laser

G. Totschnig, F. Winter, V. Pustogov, J. Faist, and A. Müller
Opt. Lett. 27(20) 1788-1790 (2002)

Room-temperature continuous-wave operation of an external-cavity quantum cascade laser

Arun Mohan, Andreas Wittmann, Andreas Hugi, Stéphane Blaser, Marcella Giovannini, and Jérôme Faist
Opt. Lett. 32(19) 2792-2794 (2007)

Alignment-stabilized interference filter-tuned external-cavity quantum cascade laser

Jan Kischkat, Mykhaylo P. Semtsiv, Mikaela Elagin, Grygorii Monastyrskyi, Yuri Flores, Sergii Kurlov, Sven Peters, and W. Ted Masselink
Opt. Lett. 39(23) 6561-6564 (2014)

Broadband all-electronically tunable MEMS terahertz quantum cascade lasers

Ningren Han, Alexander de Geofroy, David P. Burghoff, Chun Wang I. Chan, Alan Wei Min Lee, John L. Reno, and Qing Hu
Opt. Lett. 39(12) 3480-3483 (2014)