High peak power (≥10 mW) quantum cascade superluminescent emitter

Nyan L. Aung, Zhouchangwan Yu, Ye Yu, Peter Q. Liu, Xiaojun Wang, Jen Yu Fan, Mariano Troccoli, Claire F. Gmachl

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


We report room temperature and milliwatt range mid-infrared superluminescent emission at 5 μm from Quantum Cascade (QC) devices. To achieve high power superluminescence, we utilize an ultrastrong coupling QC laser design, and employ a cavity formed by the combination of a 17° tilted cleaved facet and a wet etched rounded and sloped facet to introduce additional mirror loss. For pulsed mode operation, a 8 mm long and 15 μm wide device achieves ∼1.3 mW peak power at 300 K and a 25 μm wide device with Si3N4 anti-reflection coated rounded facet achieves ∼10.2 mW peak optical output power at 250 K.

Original languageEnglish (US)
Article number221111
JournalApplied Physics Letters
Issue number22
StatePublished - Dec 1 2014

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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