Towards 20-watt continuous wave quantum cascade lasers

Matthew Suttinger; Rowel Go; Pedro Figueiredo; Arkadiy Lyakh

doi:10.1117/12.2304832

14 May 2018 Towards 20-watt continuous wave quantum cascade lasers

Matthew Suttinger, Rowel Go, Pedro Figueiredo, Arkadiy Lyakh

Proceedings Volume 10639, Micro- and Nanotechnology Sensors, Systems, and Applications X; 1063922 (2018) https://doi.org/10.1117/12.2304832
Event: SPIE Defense + Security, 2018, Orlando, FL, United States

Abstract

Significant increase in continuous wave optical power from a single quantum cascade laser (QCL), beyond its current record of 5W, will likely require power scaling with active region lateral dimensions. Active region overheating presents a major technical problem for such broad area devices. Laser thermal resistance can be reduced and laser self-heating can be suppressed by significantly reducing active region thickness, i.e. by reducing number of active region stages and by reducing thickness of each stage in the cascade. The main challenge for quantum cascade lasers with a “thin” active region is to ensure that optical power emitted per active region unit area stays high despite the reduction in active region thickness, a condition critical for the power scaling. Experimental data demonstrating a multi-watt continuous wave operation for broad area QCLs, as well as various aspects of bandgap engineering, waveguide design, and thermal design pertinent to the broad area configuration, are discussed in this manuscript. The critical differences in broad-area laser design between mid-wave and long-wave QCLs is highlighted. Finally, semi-empirical model projections showing that the goal of reaching 20W from a single emitter is realistic is presented.

Citation Download Citation

Matthew Suttinger, Rowel Go, Pedro Figueiredo, and Arkadiy Lyakh "Towards 20-watt continuous wave quantum cascade lasers", Proc. SPIE 10639, Micro- and Nanotechnology Sensors, Systems, and Applications X, 1063922 (14 May 2018); https://doi.org/10.1117/12.2304832

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