Effect of Carrier Leakage on Optimal AR Coatings in Midinfrared Interband Cascade Lasers
Variation of leakage current in interband cascade lasers (ICLs) with different carrier concentrations achieved by coating the facet with antireflections (AR) coating was experimentally studied. Single-layer Al2O3 and double-layer ZnS-YF3, ZnS-SiO2, and Ti2O5-SiO2 AR coatings are applied to midinfrar...
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doaj-df6f9550e45741399d31fbd712b679442021-03-29T17:23:26ZengIEEEIEEE Photonics Journal1943-06552015-01-017211110.1109/JPHOT.2015.24163437067391Effect of Carrier Leakage on Optimal AR Coatings in Midinfrared Interband Cascade LasersJeyran Amirloo0Simarjeet Singh Saini1Mario Dagenais2Dept. of Electr. & Comput. Eng., Univ. of Waterloo, Waterloo, ON, CanadaDept. of Electr. & Comput. Eng., Univ. of Waterloo, Waterloo, ON, CanadaDept. of Electr. & Comput. Eng., Univ. of Maryland, College Park, MD, USAVariation of leakage current in interband cascade lasers (ICLs) with different carrier concentrations achieved by coating the facet with antireflections (AR) coating was experimentally studied. Single-layer Al2O3 and double-layer ZnS-YF3, ZnS-SiO2, and Ti2O5-SiO2 AR coatings are applied to midinfrared (mid-IR) ICL devices to achieve reflectance ranging from 0.15 to 7 × 10<sup>-4</sup>. By monitoring the laser performance before and after coating, it was observed that, for lower reflectivity coatings, the leakage current appreciably rises with increasing carrier concentration, thus diminishing the slope efficiency improvements and, in fact, degrading the slope efficiency at very low reflectance. It was observed that the ratio of leakage to threshold current could increase by 17% for high carrier concentrations at very low AR coating values. The results also allow for experimental optimization of AR coatings for increased slope efficiency in mid-IR ICLs. Therefore, in this paper, we propose an optimal value for the AR coatings in order to maximize the power in ICLs.https://ieeexplore.ieee.org/document/7067391/Interband cascade lasersanti-reflection coatingsslope efficiency |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Jeyran Amirloo Simarjeet Singh Saini Mario Dagenais |
spellingShingle |
Jeyran Amirloo Simarjeet Singh Saini Mario Dagenais Effect of Carrier Leakage on Optimal AR Coatings in Midinfrared Interband Cascade Lasers IEEE Photonics Journal Interband cascade lasers anti-reflection coatings slope efficiency |
author_facet |
Jeyran Amirloo Simarjeet Singh Saini Mario Dagenais |
author_sort |
Jeyran Amirloo |
title |
Effect of Carrier Leakage on Optimal AR Coatings in Midinfrared Interband Cascade Lasers |
title_short |
Effect of Carrier Leakage on Optimal AR Coatings in Midinfrared Interband Cascade Lasers |
title_full |
Effect of Carrier Leakage on Optimal AR Coatings in Midinfrared Interband Cascade Lasers |
title_fullStr |
Effect of Carrier Leakage on Optimal AR Coatings in Midinfrared Interband Cascade Lasers |
title_full_unstemmed |
Effect of Carrier Leakage on Optimal AR Coatings in Midinfrared Interband Cascade Lasers |
title_sort |
effect of carrier leakage on optimal ar coatings in midinfrared interband cascade lasers |
publisher |
IEEE |
series |
IEEE Photonics Journal |
issn |
1943-0655 |
publishDate |
2015-01-01 |
description |
Variation of leakage current in interband cascade lasers (ICLs) with different carrier concentrations achieved by coating the facet with antireflections (AR) coating was experimentally studied. Single-layer Al2O3 and double-layer ZnS-YF3, ZnS-SiO2, and Ti2O5-SiO2 AR coatings are applied to midinfrared (mid-IR) ICL devices to achieve reflectance ranging from 0.15 to 7 × 10<sup>-4</sup>. By monitoring the laser performance before and after coating, it was observed that, for lower reflectivity coatings, the leakage current appreciably rises with increasing carrier concentration, thus diminishing the slope efficiency improvements and, in fact, degrading the slope efficiency at very low reflectance. It was observed that the ratio of leakage to threshold current could increase by 17% for high carrier concentrations at very low AR coating values. The results also allow for experimental optimization of AR coatings for increased slope efficiency in mid-IR ICLs. Therefore, in this paper, we propose an optimal value for the AR coatings in order to maximize the power in ICLs. |
topic |
Interband cascade lasers anti-reflection coatings slope efficiency |
url |
https://ieeexplore.ieee.org/document/7067391/ |
work_keys_str_mv |
AT jeyranamirloo effectofcarrierleakageonoptimalarcoatingsinmidinfraredinterbandcascadelasers AT simarjeetsinghsaini effectofcarrierleakageonoptimalarcoatingsinmidinfraredinterbandcascadelasers AT mariodagenais effectofcarrierleakageonoptimalarcoatingsinmidinfraredinterbandcascadelasers |
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1724197899118575616 |