Abstract

We demonstrate heterodyne mixing of two free-running, multimode, 3.3-THz quantum cascade lasers by use of a point-contact Schottky diode. By temperature tuning the emission wavelength of one laser, a difference frequency signal spanning the 2–4-GHz range is obtained, with a signal-to-noise ratio of 30 dB. The frequency of the heterodyne signal is subject to random fluctuations of a few megahertz, principally from instabilities in the temperatures of the devices. From single-shot measurements we derive an instantaneous linewidth for a single Fabry–Perot mode of 20 kHz, corresponding to an integration time of 3.6 ms.

© 2004 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Linewidth and tuning characteristics of terahertz quantum cascade lasers

A. Barkan, F. K. Tittel, D. M. Mittleman, R. Dengler, P. H. Siegel, G. Scalari, L. Ajili, J. Faist, H. E. Beere, E. H. Linfield, A. G. Davies, and D. A. Ritchie
Opt. Lett. 29(6) 575-577 (2004)

Generation of tunable far-infrared radiation with a quantum cascade laser

Gianluca Gagliardi, Silvia Viciani, Massimo Inguscio, Paolo De Natale, Claire Gmachl, Federico Capasso, Deborah L. Sivco, James N. Baillargeon, Albert L. Hutchinson, and Alfred Y. Cho
Opt. Lett. 27(7) 521-523 (2002)

Common mode frequency instability in internally phase-locked terahertz quantum cascade lasers

M. C. Wanke, A. D. Grine, C. T. Fuller, C. D. Nordquist, M. J. Cich, J. L. Reno, and Mark Lee
Opt. Express 19(24) 24810-24815 (2011)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (3)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription