High power, broad tuning quantum cascade laser at λ â¼ 8.9 µm.
Opt Express
; 31(25): 41252-41258, 2023 Dec 04.
Article
em En
| MEDLINE
| ID: mdl-38087528
ABSTRACT
Many molecules have broad fingerprint absorption spectra in mid-wave infrared range which requires broadly tunable lasers to cover the interested spectrum in one scan. We report a strain-balanced, InAlAs/InGaAs/InP quantum cascade laser structure based on diagonal transition active region with high output power and and wide tuning range at λ â¼ 8.9 µm. The maximum pulsed optical power and the wall-plug efficiency at room temperature are 4 W and 11.7%, respectively. Maximum continuous wave double-facet power is 1.2 W at 25 °C for a 4 mm by 9 µm laser mounted epi-side down on a diamond/copper composite submount. The maximum pulsed and continuous wave external-cavity tuning range are from 7.71 µm to 9.15 µm and from 8 µm to 8.9 µm, respectively. The continuous wave power of the external cavity mode exceeds 200â
mW across the entire spectrum.
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MEDLINE
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En
Ano de publicação:
2023
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Article