| Autor: |
Pinto D, Díaz Thomas DA, Loghmari Z, Kinjalk K, Teissier R, Bahriz M, Lendl B, Baranov AN |
| Jazyk: |
angličtina |
| Zdroj: |
Optics express [Opt Express] 2024 Jul 15; Vol. 32 (15), pp. 26925-26937. |
| DOI: |
10.1364/OE.521039 |
| Abstrakt: |
We present a study on distributed feedback tapered quantum cascade lasers emitting at 14 µm. The fabricated lasers with taper angles between 0° and 3° exhibited output powers scaling in accordance with the active zone volume increase. Reduced divergence angles as small as 4.2° have been obtained with diffraction limited-beam quality (M 2 ≈ 1). With a first order Bragg-grating for single longitudinal mode selection, continuous wave operation was demonstrated up to almost room temperature with side-mode suppression ratios greater than 20 dB. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
|
