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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 15 — Jul. 16, 2012
  • pp: 16662–16670

Measuring the sampling coherence of a terahertz quantum cascade laser

Jean Maysonnave, Nathan Jukam, M. Shahrizan M. Ibrahim, Rakchanok Rungsawang, Kenneth Maussang, Julien Madéo, Pierrick Cavalié, Paul Dean, Suraj P. Khanna, D. Paul Steenson, Edmund H. Linfield, A. Giles Davies, Sukhdeep S. Dhillon, and Jérôme Tignon  »View Author Affiliations


Optics Express, Vol. 20, Issue 15, pp. 16662-16670 (2012)
http://dx.doi.org/10.1364/OE.20.016662


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Abstract

The emission of a quantum cascade laser can be synchronized to the repetition rate of a femtosecond laser through the use of coherent injection seeding. This synchronization defines a sampling coherence between the terahertz laser emission and the femtosecond laser which enables coherent field detection. In this letter the sampling coherence is measured in the time-domain through the use of coherent and incoherent detection. For large seed amplitudes the emission is synchronized, while for small seed amplitudes the emission is non-synchronized. For intermediate seed amplitudes the emission exhibits a partial sampling coherence that is time-dependent.

© 2012 OSA

OCIS Codes
(140.3070) Lasers and laser optics : Infrared and far-infrared lasers
(320.7080) Ultrafast optics : Ultrafast devices
(040.2235) Detectors : Far infrared or terahertz
(140.5965) Lasers and laser optics : Semiconductor lasers, quantum cascade

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: March 19, 2012
Revised Manuscript: April 22, 2012
Manuscript Accepted: May 15, 2012
Published: July 9, 2012

Citation
Jean Maysonnave, Nathan Jukam, M. Shahrizan M. Ibrahim, Rakchanok Rungsawang, Kenneth Maussang, Julien Madéo, Pierrick Cavalié, Paul Dean, Suraj P. Khanna, D. Paul Steenson, Edmund H. Linfield, A. Giles Davies, Sukhdeep S. Dhillon, and Jérôme Tignon, "Measuring the sampling coherence of a terahertz quantum cascade laser," Opt. Express 20, 16662-16670 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-15-16662


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