Single-mode interband cascade laser based on V-coupled cavity with 210â
nm wavelength tuning range near 3â
µm.
Opt Express
; 31(23): 38409-38418, 2023 Nov 06.
Article
em En
| MEDLINE
| ID: mdl-38017948
ABSTRACT
Interband cascade lasers (ICLs) are efficient and compact mid-infrared (3-5 µm) light sources with many applications. By enhancing the coupling coefficient and using a type-I ICL wafer, single-mode ICLs were demonstrated based on V-coupled cavity with significantly extended tuning range and with a side mode suppression ratio (SMSR) exceeding 35â
dB in continuous wave operation near 3 µm. A V-coupled cavity ICL exhibited a wavelength tuning up to 67â
nm at a fixed temperature, and the total tuning range exceeds 210â
nm when the heat sink temperature is adjusted from 80 to 180â
K. The realization of single-mode in such a wide temperature range with a tuning range exceeding 210â
nm verified the advantage of V-coupled cavity ICLs for effective detection of multiple gas species. This is very different from the conventional distributed feedback (DFB) laser where the single-mode operation is restricted to a narrow temperature range, in which the match between the gain peak and the DFB grating period determined wavelength is required. Another V-coupled cavity ICL is tuned over 120â
nm from 2997.56â
nm to 3117.50â
nm with the heat-sink temperature varied from 210â
K to 240â
K, over 100â
K higher than the previously reported maximum operating temperature for V-coupled cavity ICLs.
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01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
Opt Express
Ano de publicação:
2023
Tipo de documento:
Article