Back to Search
Start Over
Narrow linewidth characteristics of interband cascade lasers.
- Source :
-
Applied Physics Letters . 5/18/2020, Vol. 116 Issue 20, p1-5. 5p. 1 Diagram, 5 Graphs. - Publication Year :
- 2020
-
Abstract
- Narrow-linewidth mid-infrared laser sources are highly demanding for high-resolution gas spectroscopy applications. Interband cascade lasers (ICLs) are power-efficient laser sources emitting in the mid-infrared range. This work unveils the low phase noise characteristics of distributed feedback ICLs driven by a battery source. We show that the measured spectral linewidth of ICLs is as narrow as 284 kHz (at a 1 ms observation time), which is smaller than those of common quantum cascade lasers. On the other hand, raising the pump current reduces the intrinsic linewidth down to 12 kHz. The linewidth broadening factor is in the range of 2.0–3.0, leading to a Schawlow–Townes linewidth as narrow as 1.6 kHz. This work suggests the high potential of developing battery-driven, high-resolution gas spectroscopy instruments using ICLs. [ABSTRACT FROM AUTHOR]
- Subjects :
- *INFRARED lasers
*QUANTUM cascade lasers
*LASERS
*PHASE noise
Subjects
Details
- Language :
- English
- ISSN :
- 00036951
- Volume :
- 116
- Issue :
- 20
- Database :
- Academic Search Index
- Journal :
- Applied Physics Letters
- Publication Type :
- Academic Journal
- Accession number :
- 143414345
- Full Text :
- https://doi.org/10.1063/5.0006823