We demonstrate a tapered quantum cascade laser with sloped side-walls emitting a high-brightness single-lobe beam at 8.1 μm with a peak power of 4 W at room temperature. Using a combination of high and low reflectivity facet coatings, the power output is increased to 6.2 W while a high beam quality is maintained. Plasmonic collimators are fabricated on the facet of the uncoated lasers without compromising power output, demonstrating the viability of this beam-shaping strategy for high-power lasers. The collimated lasers emit a beam with a more circular cross-section, which is more amenable to high-efficiency coupling into mid-infrared optical fibers.
REFERENCES
1.
R. F.
Curl
, F.
Capasso
, C.
Gmachl
, A. A.
Kosterev
, B.
McManus
, R.
Lewicki
, M.
Pusharsky
, G.
Wysocki
, and F. K.
Tittel
, Chem. Phys. Lett.
487
, 1
(2010
).2.
R.
Martini
, C.
Bethea
, F.
Capasso
, C.
Gmachl
, R.
Paiella
, E. A.
Whittaker
, H. Y.
Hwang
, D. L.
Sivco
, J. N.
Baillargeon
, and A. Y.
Cho
, Electron. Lett.
38
, 181
(2002
).3.
A.
Lyakh
, R.
Maulini
, A.
Tsekoun
, R.
Go
, S.
Von der Porten
, C.
Pflügl
, L.
Diehl
, F.
Capasso
, and K. N.
Patel
, Proc. Natl. Acad. Sci. U.S.A.
107
, 18799
(2010
).4.
Y.
Bai
, N.
Bandyopadhyay
, S.
Tsao
, S.
Slivken
, and M.
Razeghi
, Appl. Phys. Lett.
98
, 181102
(2011
).5.
B.
Gokden
, T. S.
Mansuripur
, R.
Blanchard
, C.
Wang
, A.
Goyal
, A.
Sanchez-Rubio
, G.
Turner
, and F.
Capasso
, Appl. Phys. Lett.
102
, 053503
(2013
) .6.
L.
Nahle
, J.
Semmel
, W.
Kaiser
, S.
Hofling
, and A.
Forchel
, Appl. Phys. Lett.
91
, 181122
(2007
).7.
Y.
Bai
, S.
Slivken
, Q. Y.
Lu
, N.
Bandyopadhyay
, and M.
Razeghi
, Appl. Phys. Lett.
101
, 081106
(2012
).8.
K.
Fujita
, S.
Furuta
, A.
Sugiyama
, T.
Ochiai
, T.
Edamura
, N.
Akikusa
, M.
Yamanishi
, and H.
Kan
, IEEE J. Quantum Electron.
46
, 683
–688
(2010
).9.
G.
Hatakoshi
, Opt. Rev.
10
, 307
(2003
).10.
D.
Bisping
, D.
Pucicki
, M.
Fischer
, J.
Koeth
, C.
Zimmermann
, P.
Weinmann
, S.
Hofling
, M.
Kamp
, and A.
Forchel
, IEEE J. Sel. Top. Quantum Electron.
15
, 968
(2009
).11.
R.
Maulini
, A.
Lyakh
, A.
Tsekoun
, R.
Go
, C.
Pflügl
, L.
Diehl
, F.
Capasso
, and K.
Patel
, Appl. Phys. Lett.
95
, 151112
(2009
).12.
Y.
Bai
, S. R.
Darvish
, N.
Bandyopadhyay
, S.
Slivken
, and M.
Razeghi
, J. Appl. Phys.
109
, 053103
(2011
).13.
E. D.
Palik
, Handbook of Optical Constants of Solids
(Academic Press
, New York
, 1991
).14.
J. N.
Walpole
, Opt. Quantum Electron.
28
, 623
(1996
).15.
N.
Yu
, J.
Fan
, Q.
Wang
, C.
Pflügl
, L.
Diehl
, T.
Edamura
, M.
Yamanishi
, H.
Kan
, and F.
Capasso
, Nat. Photonics
2
, 564
(2008
).16.
N.
Yu
, R.
Blanchard
, J.
Fan
, F.
Capasso
, T.
Edamura
, M.
Yamanishi
, and H.
Kan
, Appl. Phys. Lett.
93
, 181101
(2008
).17.
N.
Yu
, R.
Blanchard
, J.
Fan
, Q.
Wang
, C.
Pflügl
, L.
Diehl
, T.
Edamura
, S.
Furuta
, M.
Yamanishi
, H.
Kan
, and F.
Capasso
, IEEE Trans. Nanotechnol.
9
, 11
(2010
).18.
N.
Yu
, Q.
Wang
, C.
Pflügl
, L.
Diehl
, F.
Capasso
, T.
Edamura
, S.
Furuta
, M.
Yamanishi
, and H.
Kan
, Appl. Phys. Lett.
94
, 151101
(2009
).19.
J.-P.
Tetienne
, R.
Blanchard
, N.
Yu
, P.
Genevet
, M. A.
Kats
, J. A.
Fan
, T.
Edamura
, S.
Furuta
, M.
Yamanishi
, and F.
Capasso
, New J. Phys.
13
, 53057
(2011
).© 2013 AIP Publishing LLC.
2013
AIP Publishing LLC
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