Search

Your search keyword '"Michael Niehle"' showing total 3 results
Start Over Author "Michael Niehle" Publisher aip publishing llc
3 results on '"Michael Niehle"'

1. Continuous tuning of two-section, single-mode terahertz quantum-cascade lasers by fiber-coupled, near-infrared illumination

Author

Martin Hempel, Benjamin Röben, Michael Niehle, Lutz Schrottke, Achim Trampert, and Holger T. Grahn

Subjects
Physics, QC1-999
Abstract

The dynamical tuning due to rear facet illumination of single-mode, terahertz (THz) quantum-cascade lasers (QCLs) which employ distributed feedback gratings are compared to the tuning of single-mode QCLs based on two-section cavities. The THz QCLs under investigation emit in the range of 3 to 4.7 THz. The tuning is achieved by illuminating the rear facet of the QCL with a fiber-coupled light source emitting at 777 nm. Tuning ranges of 5.0 and 11.9 GHz under continuous-wave and pulsed operation, respectively, are demonstrated for a single-mode, two-section cavity QCL emitting at about 3.1 THz, which exhibits a side-mode suppression ratio better than −25 dB.

Published
2017
Full Text
View/download PDF

3. Continuous tuning of two-section, single-mode terahertz quantum-cascade lasers by fiber-coupled, near-infrared illumination

Author

Achim Trampert, Martin Hempel, Michael Niehle, Lutz Schrottke, Holger T. Grahn, and Benjamin Röben

Subjects
010302 applied physics, Physics, Facet (geometry), business.industry, Terahertz radiation, Near-infrared spectroscopy, Single-mode optical fiber, General Physics and Astronomy, 02 engineering and technology, 021001 nanoscience & nanotechnology, Laser, 01 natural sciences, lcsh:QC1-999, law.invention, Optics, Cascade, law, 0103 physical sciences, Optoelectronics, Fiber, 0210 nano-technology, business, Quantum, lcsh:Physics
Abstract

The dynamical tuning due to rear facet illumination of single-mode, terahertz (THz) quantum-cascade lasers (QCLs) which employ distributed feedback gratings are compared to the tuning of single-mode QCLs based on two-section cavities. The THz QCLs under investigation emit in the range of 3 to 4.7 THz. The tuning is achieved by illuminating the rear facet of the QCL with a fiber-coupled light source emitting at 777 nm. Tuning ranges of 5.0 and 11.9 GHz under continuous-wave and pulsed operation, respectively, are demonstrated for a single-mode, two-section cavity QCL emitting at about 3.1 THz, which exhibits a side-mode suppression ratio better than −25 dB.

Published
2017

Catalog

Books, media, physical & digital resources
See catalog results