Heterodyne Mixing of Terahertz Quantum Cascade Lasers Using a Planar Schottky Diode

Terahertz quantum cascade lasers (QCLs) have been used together with a monolithic planar Schottky diode receiver to study the heterodyne mixing between dual internal modes of a QCL and between a single mode of a QCL and a known molecular line from a molecular gas laser. Dual-mode mixing shows that t...

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Bibliographic Details
Published in:IEEE journal of selected topics in quantum electronics 2008-03, Vol.14 (2), p.370-373
Main Authors: Lee, M., Lerttamrab, M., Wanke, M.C., Young, E.W., Grine, A.D., Reno, J.L., Siegel, P.H., Dengler, R.J.
Format: Article
Language:English
Subjects:
Frequency
Gas lasers
Heterodyne mixing
Laboratories
Laser modes
Lasers
Pulse measurements
quantum cascade laser (QCL)
Quantum cascade lasers
Quantum electronics
Receivers
Schottky diode
Schottky diodes
Solid state circuits
Superconducting device noise
Temperature
terahertz (THz)
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Summary:Terahertz quantum cascade lasers (QCLs) have been used together with a monolithic planar Schottky diode receiver to study the heterodyne mixing between dual internal modes of a QCL and between a single mode of a QCL and a known molecular line from a molecular gas laser. Dual-mode mixing shows that the intrinsic linewidth of a free-running QCL is les30 kHz . Mixing against a molecular laser line gives a high precision measurement of a QCL's absolute frequency and can show transient turn-on behavior in a pulsed QCL.
ISSN:1077-260X
1558-4542
DOI:10.1109/JSTQE.2007.910762