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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 4 — Feb. 13, 2012
  • pp: 4382–4388

Tapered 4.7 μm quantum cascade lasers with highly strained active region composition delivering over 4.5 watts of continuous wave optical power

Arkadiy Lyakh, Richard Maulini, Alexei Tsekoun, Rowel Go, and C. Kumar N. Patel  »View Author Affiliations

Optics Express, Vol. 20, Issue 4, pp. 4382-4388 (2012)

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A strain-balanced, Al0.78In0.22As/In0.72Ga0.28As/InP quantum cascade laser structure, designed for light emission at 4.7µm using the non-resonant extraction design approach, was grown by molecular beam epitaxy. Laser devices were processed in tapered buried heterostructure geometry and then mounted on AlN/SiC composite submounts using hard solder. A 10 mm long laser with 7.5µm-wide central section tapered up to 20µm at laser facets generated over 4.5W of single-ended CW/RT optical power at 283K. Maximum wallplug efficiency of 16.3% for this laser was reached at 4W level. Reliability of over 2,000h has been demonstrated for an air-cooled system delivering optical power of 3W in a collimated beam with overall system efficiency exceeding 10%.

© 2012 OSA

OCIS Codes
(140.5965) Lasers and laser optics : Semiconductor lasers, quantum cascade

ToC Category:
Lasers and Laser Optics

Original Manuscript: January 18, 2012
Revised Manuscript: January 31, 2012
Manuscript Accepted: February 3, 2012
Published: February 7, 2012

Virtual Issues
Vol. 7, Iss. 4 Virtual Journal for Biomedical Optics

Arkadiy Lyakh, Richard Maulini, Alexei Tsekoun, Rowel Go, and C. Kumar N. Patel, "Tapered 4.7 μm quantum cascade lasers with highly strained active region composition delivering over 4.5 watts of continuous wave optical power," Opt. Express 20, 4382-4388 (2012)

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  1. R. Maulini, A. Lyakh, A. Tsekoun, C. Kumar, and N. Patel, “λ~7.1 μm quantum cascade lasers with 19% wall-plug efficiency at room temperature,” Opt. Express19(18), 17203 (2011). [CrossRef]
  2. Y. Bai, N. Bandyopadhayay, S. Tsao, S. Slivken, and M. Razeghi, “Room temperature quantum cascade lasers with 27% wall plug efficiency,” Appl. Phys. Lett.98(18), 181102 (2011). [CrossRef]
  3. A. Lyakh, R. Maulini, A. Tsekoun, R. Go, C. Pflügl, L. Diehl, Q. J. Wang, F. Capasso, and C. K. N. Patel, “3 W continuous-wave room temperature single-facet emission from quantum cascade lasers based on nonresonant extraction design approach,” Appl. Phys. Lett.95(14), 141113 (2009). [CrossRef]
  4. D. Botez, S. Kumar, J. C. Shin, L. J. Mawst, I. Vurgaftman, and J. R. Meyer, “Temperature dependence of key electro-optical characteristics for midinfrared emitting quantum cascade lasers,” Appl. Phys. Lett.97(7), 071101 (2010). [CrossRef]
  5. W. Masselink, M. Semtsiv, S. Dressler, M. Ziegler, and M. Wienold, “Physics, growth, and performance of (In, Ga)As-AlP/InP quantum-cascade lasers emitting at λ<4μm,” Phys. Status Solidi B244(8), 2906–2915 (2007). [CrossRef]
  6. A. Wittmann, Y. Bonetti, J. Faist, E. Gini, and M. Giovannini, “Intersubband linewidth in quantum cascade laser design,” Appl. Phys. Lett.93(14), 141103 (2008). [CrossRef]
  7. A. Lyakh, R. Maulini, and A. Tsekoun, C. Kumar N. Patel, L. Diehl, C. Pflügl, Q. Wang and F. Capasso, U. S. Patent #8,014,430 (September 6, 2011).
  8. M. Troccoli, C. Gmachl, F. Capasso, D. L. Sivco, and A. Y. Cho, “Mid-infrared (λ≈7.4μm) quantum cascade laser amplifier for high power single-mode emission and improved beam quality,” Appl. Phys. Lett.80(22), 4103 (2002). [CrossRef]
  9. S. Menzel, L. Diehl, C. Pflügl, A. Goyal, C. Wang, A. Sanchez, G. Turner, and F. Capasso, “Quantum cascade laser master-oscillator power-amplifier with 1.5 W output power at 300 K,” Opt. Express19(17), 16229–16235 (2011). [CrossRef] [PubMed]
  10. L. Nähle, J. Semmel, W. Kaiser, S. Höfling, and A. Forchel, “Tapered quantum cascade lasers,” Appl. Phys. Lett.91(18), 181122 (2007). [CrossRef]
  11. W. Zhang, L. Wang, L. Li, J. Liu, F.-Q. Liu, and Z. Wang, “Small-divergence singlemode emitting tapered distributed feedback quantum cascade lasers,” Electron. Lett.46(7), 528 (2010). [CrossRef]
  12. A. Tsekoun, R. Go, M. Pushkarsky, M. Razeghi, and C. K. N. Patel, “Improved performance of quantum cascade lasers through a scalable, manufacturable epitaxial-side-down mounting process,” Proc. Natl. Acad. Sci. U.S.A.103(13), 4831–4835 (2006). [CrossRef] [PubMed]
  13. C. K. N. Patel, A. Lyakh, A. Tsekoun, and R. Maulini, U.S. Patent #8,068,524 (November 29, 2011).
  14. N. Yu, L. Diehl, E. Cubukcu, C. Pflügl, D. Bour, S. Corzine, J. Zhu, G. Höfler, K. B. Crozier, and F. Capasso, “Near-field imaging of quantum cascade laser transverse modes,” Opt. Express15(20), 13227–13235 (2007). [CrossRef] [PubMed]

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