Single-mode quantum cascade lasers employing a candy-cane shaped monolithic coupled cavity

Peter Q. Liu; Kamil Sladek; Xiaojun Wang; Jen Yu Fan; Claire F. Gmachl

doi:10.1063/1.3664117

Single-mode quantum cascade lasers employing a candy-cane shaped monolithic coupled cavity

Peter Q. Liu, Kamil Sladek, Xiaojun Wang, Jen Yu Fan, Claire F. Gmachl

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

Abstract

We demonstrate single-mode quantum cascade lasers emitting at ∼4.5 μm by employing a monolithic "candy-cane" shaped coupled-cavity consisting of a straight section connecting at one end to a spiral section. The fabrication process is identical to those for simple Fabry-Perot-type ridge lasers. Continuously tunable single-mode emission across ∼8 cm ^-1 with side mode suppression ratio up to ∼25 dB and a single-mode operating current range of more than 70% above the threshold current is achieved when the lasers are operated in pulsed-mode from 80 K to 155 K.

Original language	English (US)
Article number	241112
Journal	Applied Physics Letters
Volume	99
Issue number	24
DOIs	https://doi.org/10.1063/1.3664117
State	Published - Dec 12 2011
Externally published	Yes

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.3664117

Cite this

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title = "Single-mode quantum cascade lasers employing a candy-cane shaped monolithic coupled cavity",

abstract = "We demonstrate single-mode quantum cascade lasers emitting at ∼4.5 μm by employing a monolithic {"}candy-cane{"} shaped coupled-cavity consisting of a straight section connecting at one end to a spiral section. The fabrication process is identical to those for simple Fabry-Perot-type ridge lasers. Continuously tunable single-mode emission across ∼8 cm -1 with side mode suppression ratio up to ∼25 dB and a single-mode operating current range of more than 70% above the threshold current is achieved when the lasers are operated in pulsed-mode from 80 K to 155 K.",

author = "Liu, {Peter Q.} and Kamil Sladek and Xiaojun Wang and Fan, {Jen Yu} and Gmachl, {Claire F.}",

note = "Funding Information: The authors acknowledge valuable discussions with Alexey Belyanin, Ge Li, and Hakan Tureci. This work is supported by MIRTHE (NSF-ERC) and DARPA-EMIL. Kamil Sladek was supported by a DAAD doctoral fellowship.",

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doi = "10.1063/1.3664117",

language = "English (US)",

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T1 - Single-mode quantum cascade lasers employing a candy-cane shaped monolithic coupled cavity

AU - Liu, Peter Q.

AU - Sladek, Kamil

AU - Wang, Xiaojun

AU - Fan, Jen Yu

AU - Gmachl, Claire F.

N1 - Funding Information: The authors acknowledge valuable discussions with Alexey Belyanin, Ge Li, and Hakan Tureci. This work is supported by MIRTHE (NSF-ERC) and DARPA-EMIL. Kamil Sladek was supported by a DAAD doctoral fellowship.

PY - 2011/12/12

Y1 - 2011/12/12

N2 - We demonstrate single-mode quantum cascade lasers emitting at ∼4.5 μm by employing a monolithic "candy-cane" shaped coupled-cavity consisting of a straight section connecting at one end to a spiral section. The fabrication process is identical to those for simple Fabry-Perot-type ridge lasers. Continuously tunable single-mode emission across ∼8 cm -1 with side mode suppression ratio up to ∼25 dB and a single-mode operating current range of more than 70% above the threshold current is achieved when the lasers are operated in pulsed-mode from 80 K to 155 K.

AB - We demonstrate single-mode quantum cascade lasers emitting at ∼4.5 μm by employing a monolithic "candy-cane" shaped coupled-cavity consisting of a straight section connecting at one end to a spiral section. The fabrication process is identical to those for simple Fabry-Perot-type ridge lasers. Continuously tunable single-mode emission across ∼8 cm -1 with side mode suppression ratio up to ∼25 dB and a single-mode operating current range of more than 70% above the threshold current is achieved when the lasers are operated in pulsed-mode from 80 K to 155 K.

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ER -

Single-mode quantum cascade lasers employing a candy-cane shaped monolithic coupled cavity

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