THz QCLs for heterodyne receivers and wavelength modulation spectroscopy

Alan W. M. Lee; Tsung-Yu Kao; Ian A. Zimmerman; William T. S. Cole; Richard Thurston; Richard J. Saykally; Ningren Han; Qing Hu

doi:10.1117/12.2224158

25 May 2016 THz QCLs for heterodyne receivers and wavelength modulation spectroscopy

Alan W. M. Lee, Tsung-Yu Kao, Ian A. Zimmerman, William T. S. Cole, Richard Thurston, Richard J. Saykally, Ningren Han, Qing Hu

Author Affiliations +

Proceedings Volume 9836, Micro- and Nanotechnology Sensors, Systems, and Applications VIII; 98362O (2016) https://doi.org/10.1117/12.2224158
Event: SPIE Defense + Security, 2016, Baltimore, MD, United States

Abstract

Milliwatt average power terahertz quantum cascade lasers (THz-QCLs, 2 THz to 5 THz) have been developed for spectroscopy and as local oscillators for heterodyne receivers. Novel DFB THz-QCLs have been fabricated and show single-mode operation. The narrow line widths of <10 MHz and stark shift tuning of of 6 GHz, allows for wavelength modulation spectroscopy of low pressure gasses in the unexplored THz frequency band. The same devices also act as local-oscillators for heterodyne receivers for remote-sensing and astronomy. Lastly we report on improved tunable DFB devices for use in spectroscopy.

Citation Download Citation

Alan W. M. Lee, Tsung-Yu Kao, Ian A. Zimmerman, William T. S. Cole, Richard Thurston, Richard J. Saykally, Ningren Han, and Qing Hu "THz QCLs for heterodyne receivers and wavelength modulation spectroscopy", Proc. SPIE 9836, Micro- and Nanotechnology Sensors, Systems, and Applications VIII, 98362O (25 May 2016); https://doi.org/10.1117/12.2224158

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available