Broadband quantum cascade laser gain medium based on a "continuum-to- bound" active region design

Yu Yao, William O. Charles, Tracy Tsai, Jianxin Chen, Gerard Wysocki, Claire F. Gmachl

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

We present quantum cascade laser designs at 7-9 μm with two lower injector states strongly coupled with the upper laser state at the operating electric fields. Optical transitions from these three coupled states contribute to a large gain spectrum width (∼250 cm-1 full width at half maximum), which enables external cavity tuning of the lasers over 200 cm-1. Lasers show comparable performance to the conventional narrow band design at a similar wavelength with a peak modal gain coefficient of ∼10 kA/cm, a slope efficiency ∼1 W/A, and good temperature performance (T 0=170 K) in pulsed mode operation at 295 K.

Original languageEnglish (US)
Article number211106
JournalApplied Physics Letters
Volume96
Issue number21
DOIs
StatePublished - May 24 2010
Externally publishedYes

Fingerprint

quantum cascade lasers
continuums
broadband
lasers
injectors
optical transition
narrowband
tuning
slopes
cavities
electric fields
coefficients
wavelengths
temperature

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Broadband quantum cascade laser gain medium based on a "continuum-to- bound" active region design. / Yao, Yu; Charles, William O.; Tsai, Tracy; Chen, Jianxin; Wysocki, Gerard; Gmachl, Claire F.

In: Applied Physics Letters, Vol. 96, No. 21, 211106, 24.05.2010.

Research output: Contribution to journalArticle

Yao, Yu ; Charles, William O. ; Tsai, Tracy ; Chen, Jianxin ; Wysocki, Gerard ; Gmachl, Claire F. / Broadband quantum cascade laser gain medium based on a "continuum-to- bound" active region design. In: Applied Physics Letters. 2010 ; Vol. 96, No. 21.
@article{641e01b7239b4622a3cf47ea9d44d763,
title = "Broadband quantum cascade laser gain medium based on a {"}continuum-to- bound{"} active region design",
abstract = "We present quantum cascade laser designs at 7-9 μm with two lower injector states strongly coupled with the upper laser state at the operating electric fields. Optical transitions from these three coupled states contribute to a large gain spectrum width (∼250 cm-1 full width at half maximum), which enables external cavity tuning of the lasers over 200 cm-1. Lasers show comparable performance to the conventional narrow band design at a similar wavelength with a peak modal gain coefficient of ∼10 kA/cm, a slope efficiency ∼1 W/A, and good temperature performance (T 0=170 K) in pulsed mode operation at 295 K.",
author = "Yu Yao and Charles, {William O.} and Tracy Tsai and Jianxin Chen and Gerard Wysocki and Gmachl, {Claire F.}",
year = "2010",
month = "5",
day = "24",
doi = "10.1063/1.3431577",
language = "English (US)",
volume = "96",
journal = "Applied Physics Letters",
issn = "0003-6951",
publisher = "American Institute of Physics Publising LLC",
number = "21",

}

TY - JOUR

T1 - Broadband quantum cascade laser gain medium based on a "continuum-to- bound" active region design

AU - Yao, Yu

AU - Charles, William O.

AU - Tsai, Tracy

AU - Chen, Jianxin

AU - Wysocki, Gerard

AU - Gmachl, Claire F.

PY - 2010/5/24

Y1 - 2010/5/24

N2 - We present quantum cascade laser designs at 7-9 μm with two lower injector states strongly coupled with the upper laser state at the operating electric fields. Optical transitions from these three coupled states contribute to a large gain spectrum width (∼250 cm-1 full width at half maximum), which enables external cavity tuning of the lasers over 200 cm-1. Lasers show comparable performance to the conventional narrow band design at a similar wavelength with a peak modal gain coefficient of ∼10 kA/cm, a slope efficiency ∼1 W/A, and good temperature performance (T 0=170 K) in pulsed mode operation at 295 K.

AB - We present quantum cascade laser designs at 7-9 μm with two lower injector states strongly coupled with the upper laser state at the operating electric fields. Optical transitions from these three coupled states contribute to a large gain spectrum width (∼250 cm-1 full width at half maximum), which enables external cavity tuning of the lasers over 200 cm-1. Lasers show comparable performance to the conventional narrow band design at a similar wavelength with a peak modal gain coefficient of ∼10 kA/cm, a slope efficiency ∼1 W/A, and good temperature performance (T 0=170 K) in pulsed mode operation at 295 K.

UR - http://www.scopus.com/inward/record.url?scp=77956192600&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77956192600&partnerID=8YFLogxK

U2 - 10.1063/1.3431577

DO - 10.1063/1.3431577

M3 - Article

AN - SCOPUS:77956192600

VL - 96

JO - Applied Physics Letters

JF - Applied Physics Letters

SN - 0003-6951

IS - 21

M1 - 211106

ER -