High performance quantum cascade lasers with broadband gain spectra

Yu Yao; Xiaojun Wang; Jen-Yu Fan; William O. Charles; Tracy Tsai; Jianxin Chen; Gerard Wysocki; Claire F. Gmachl

doi:10.1117/12.873854

16 February 2011 High performance quantum cascade lasers with broadband gain spectra

Yu Yao, Xiaojun Wang, Jen-Yu Fan, William O. Charles, Tracy Tsai, Jianxin Chen, Gerard Wysocki, Claire F. Gmachl

Proceedings Volume 7953, Novel In-Plane Semiconductor Lasers X; 795317 (2011) https://doi.org/10.1117/12.873854
Event: SPIE OPTO, 2011, San Francisco, California, United States

Abstract

QC laser active regions with multiple transitions from strongly coupled upper laser states to lower laser states were designed to achieve broad gain spectra as well as high performance. Two broad gain QC laser designs in the 7-9 μm wavelength region were demonstrated based on the continuum-to-bound design. The first embodiment of one design at ~8 μm enables external cavity tuning over 190 cm^-1 (7.5 - 8.8 μm) in pulsed mode operation at 0°C. We also demonstrated a QC laser structure based on a continuum-to-continuum active region in the 4-5 μm wavelength region with a gain spectrum of ~ 430 cm^-1. External cavity tuning over 340 cm^-1 (4.4 - 5.2 μm) was achieved with this design in pulsed mode operation at 15°C. In spite of the broad gain spectrum, a low threshold current density (1.6 kA/cm2), large slope efficiency (4.5 W/A), good temperature performance (T0=160 K), high peak power (up to 5 W) and high wall plug efficiency (WPE, up to 20%) were achieved for ridge lasers with as cleaved facets, in pulsed mode operation at 295 K, demonstrating that it is possible to make a wide gain spectrum compatible with high power and efficiency performance.

Citation Download Citation

Yu Yao, Xiaojun Wang, Jen-Yu Fan, William O. Charles, Tracy Tsai, Jianxin Chen, Gerard Wysocki, and Claire F. Gmachl "High performance quantum cascade lasers with broadband gain spectra", Proc. SPIE 7953, Novel In-Plane Semiconductor Lasers X, 795317 (16 February 2011); https://doi.org/10.1117/12.873854

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

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
10 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Quantum cascade lasers

Electroluminescence

Pulsed laser operation

Laser damage threshold

Laser development

Laser scattering

Electron transport

Show All Keywords

Keywords/Phrases

Search In:

Publication Years