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Phase-locking of a 2.7-THz quantum cascade laser to a mode-locked erbium-doped fibre laser

Barbieri, Stefano and Gellie, Pierre and Santarelli, Giorgio and Ding, Lu and Maineult, Wilfried and Sirtori, Carlo and Colombelli, Raffaele and Beere, Harvey and Ritchie, David (2009) Phase-locking of a 2.7-THz quantum cascade laser to a mode-locked erbium-doped fibre laser. In: 20th International Symposium on Space Terahertz Technology, 20-22 April 2009, Charlottesville, VA.

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We demonstrate phase-locking of a 2.7-THz metalmetal waveguide quantum cascade laser (QCL) to an external microwave signal. The reference is the 15th harmonic, generated by a semiconductor superlattice nonlinear device, of a signal at 182 GHz, which itself is generated by a multiplier-chain (x2x3x2) from a microwave synthesizer at 15 GHz. Both laser and reference radiations are coupled into a hot electron bolometer mixer, resulting in a beat signal, which is fed into a phase-lock loop. Spectral analysis of the beat signal (see fig. 1) confirms that the QCL is phase locked. This result opens the possibility to extend heterodyne interferometers into the far-infrared range.

Item Type:Conference or Workshop Item (Paper)
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Additional Information:© 2009 Associated Universities, Inc. The authors acknowledge NASA-JPL for the use of a W-band power amplifier chain used for spectral tests of Herschel-HIFI.
Group:Keck Institute for Space Studies
Record Number:CaltechAUTHORS:20160311-153127878
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:65323
Deposited By: Colette Connor
Deposited On:12 Mar 2016 00:34
Last Modified:03 Oct 2019 09:46

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