Loading…

THz Schottky diode harmonic mixers for QCL phase-locking

A fundamental 1.9-2.8 THz Schottky diode mixer has been modified to enable high harmonic mixing, thus allowing use of the mixer for phase locking of a quantum cascade laser (QCL) to an stable external microwave source. Phase locking to a reference will transfer the spectral line profile of the refer...

Full description

Saved in:
Bibliographic Details
Main Authors: Bulcha, Berhanu T., Kurtz, David S., Groppi, Chris, Hesler, Jeffrey L., Barker, N. Scott
Format: Conference Proceeding
Language:English
Subjects:
Citations: Items that cite this one
Online Access:Request full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A fundamental 1.9-2.8 THz Schottky diode mixer has been modified to enable high harmonic mixing, thus allowing use of the mixer for phase locking of a quantum cascade laser (QCL) to an stable external microwave source. Phase locking to a reference will transfer the spectral line profile of the reference to the THz source; this will control the phase precisely. Stabilizing a QCL for a single frequency operation will help to reduce the drift due to temperature and other external biases. The mixer can be used for several applications, such as, heterodyne interferometer in far-infrared range and high-resolution heterodyne spectroscopy. The design and characterization of the harmonic mixer will be presented. A conversion loss of 63 dB for harmonic mixing at N=9 and 45 dB for N=3 were measured with a 2 THz input signal.
ISSN:2162-2027
DOI:10.1109/IRMMW-THz.2013.6665858