In:
Journal of Semiconductors, IOP Publishing, Vol. 42, No. 9 ( 2021-09-01), p. 092901-
Abstract:
In this work, we demonstrated high-power quantum cascade laser (QCL) arrays lasing at λ ~ 5 µ m by employing an optimized coupled-ridge waveguide (CRW) structure. Five-element QCL arrays were simulated and fabricated through a two-step etching method to extend the CRW structure to a mid-wave infrared regime. A lateral far-field with the main peak near a diffraction-limited intensity curve of about 10° was observed by properly designing a geometric shape of the ridges and interspaces. By introducing a buried 2nd-order distributed feedback (DFB) grating, substrate emission with a radiation power above 1 W at 25 °C is achieved. Single longitudinal mode operation is obtained by changing the temperature of the heatsink with a good linear wavelength tuning coefficient of –0.2 cm –1 /K.
Type of Medium:
Online Resource
ISSN:
1674-4926
,
2058-6140
DOI:
10.1088/1674-4926/42/9/092901
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
2021
detail.hit.zdb_id:
2484682-X
Permalink