Abstract
We present a wavelength-tunable, external-cavity GaSb-based quantum-well laser operating near 3.2 μm. The laser setup consists of an intra-cavity grating in Littman-Metcalf configuration and a cascade pumped GaSb-based gain chip with a narrow-ridge waveguide. The narrow-ridge waveguide has a length of 2 mm and width of 7.5 μm. Cascade pumping is realized with three type-I quantum-wells, using one quantum-well per cascade stage. The laser provides continuous-wave output powers up to 8 mW and slope-efficiencies of 13 % at room temperature. Laser operation is demonstrated over a wavelength range of more than 300 nm, using continuous-wave and pulsed operation regimes.
Original language | English |
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Pages (from-to) | 1941 - 1943 |
Number of pages | 3 |
Journal | IEEE Photonics Technology Letters |
Volume | 30 |
Issue number | 22 |
Early online date | 1 Oct 2018 |
DOIs | |
Publication status | Published - 15 Nov 2018 |
Bibliographical note
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