High power quantum cascade lasers: A room temperature reality

Steve Slivken*, Allan Evans, Lisa Doris, John David, Jae Su Yu, Manijeh Razeghi

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review


Mid- and far-infrared diode laser sources have been used in spectroscopic applications for a number of years. Historically, however, the application of these devices has been hindered by low output power and the need for cryogenic refrigeration. The quantum cascade laser, being an unipolar device, does not suffer from the same non-radiative mechanisms that have limited most mid- and far-infrared laser sources. Despite some intrinsic inefficiency due to a shorter carrier lifetime and higher optical losses than near-infrared bipolar diodes, this technology is now capable of both room temperature and high power operation over a significant portion of the mid- and far-infrared spectral region. With potential for multiwatt arrays, many more, especially remote, applications have started to become feasible. This talk will go through some of the development cycle at the Center for Quantum Devices that has led to the demonstration of high-power, continuous-wave quantum cascade laser diodes. While the focus will be mostly on continuous operation, quasi-cw operation will also be given as an alternative for even higher average power delivery. In conclusion, the current limitations to diode performance will be discussed, as well as possible near- and long-term solutions.

Original languageEnglish (US)
Number of pages1
JournalOSA Trends in Optics and Photonics Series
Volume96 A
StatePublished - 2004
EventConference on Lasers and Electro-Optics, CLEO - Washington, DC, United States
Duration: May 17 2004May 19 2004

ASJC Scopus subject areas

  • Engineering(all)


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