TY - JOUR
T1 - Cavity length scaling of quantum cascade lasers for single-mode emission and low heat dissipation, room temperature, continuous wave operation
AU - Cendejas, Richard A.
AU - Liu, Zhijun
AU - Sánchez-Vaynshteyn, Wendy
AU - Caneau, Catherine G.
AU - Zah, Chung En
AU - Gmachl, Claire F.
N1 - Funding Information:
Manuscript received December 20, 2010; accepted December 23, 2010. Date of publication December 31, 2010; date of current version January 24, 2011. This work was supported by MIRTHE (NSF-ERC) under Grant EEC-0540832. Corresponding author: R. A. Cendejas (e-mail: [email protected]).
PY - 2011
Y1 - 2011
N2 - Single-mode operation of Fabry-Perot quantum cascade (QC) lasers is achieved through the systematic shortening of the cavity length from 764 to 110 μm. The increased mirror loss is mitigated using highly reflective (HR) metallic facet coatings (R > 95%). Ultrashort cavity QC lasers operate single mode with the best device having a mode-hop free current tuning range of 3.44 cm-1. Using combined heat-sink temperature and current tuning, the largest single-mode tuning range attained was 8.56 cm-1. The heat dissipation of a 110-μm ultrashort cavity QC laser is 0.23 W at 80 K and 0.43 W at 150 K. With a 500-μm cavity and both facets HR coated with reflectivities of ∼95% and 75%, room-temperature continuous wave operation is realized with heat dissipation of 1.2-1.7 W.
AB - Single-mode operation of Fabry-Perot quantum cascade (QC) lasers is achieved through the systematic shortening of the cavity length from 764 to 110 μm. The increased mirror loss is mitigated using highly reflective (HR) metallic facet coatings (R > 95%). Ultrashort cavity QC lasers operate single mode with the best device having a mode-hop free current tuning range of 3.44 cm-1. Using combined heat-sink temperature and current tuning, the largest single-mode tuning range attained was 8.56 cm-1. The heat dissipation of a 110-μm ultrashort cavity QC laser is 0.23 W at 80 K and 0.43 W at 150 K. With a 500-μm cavity and both facets HR coated with reflectivities of ∼95% and 75%, room-temperature continuous wave operation is realized with heat dissipation of 1.2-1.7 W.
KW - Optical resonators
KW - quantum cascade lasers
KW - single-mode operation
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U2 - 10.1109/JPHOT.2010.2103376
DO - 10.1109/JPHOT.2010.2103376
M3 - Article
AN - SCOPUS:79251636228
SN - 1943-0655
VL - 3
SP - 71
EP - 81
JO - IEEE Photonics Journal
JF - IEEE Photonics Journal
IS - 1
M1 - 5680570
ER -