Achieving comb formation over the entire lasing range of quantum cascade lasers
Abstract
Frequency combs based on quantum cascade laser (QCL) are finding promising applications in highspeed broadband spectroscopy in the terahertz regime, where many molecules have their "fingerprints". To form stable combs in QCLs, an effective control of group velocity dispersion plays a critical role. The dispersion of the QCL cavity has two main parts: a static part from the material and a dynamic part from the intersubband transitions. Unlike the gain, which is clamped to a fixed value above the lasing threshold, dispersion associated with the intersubband transitions changes with bias even above the threshold, and this reduces the dynamic range of comb formation. Here, by incorporating tunability into the dispersion compensator, we demonstrate a QCL device exhibiting comb operation from Ith to Imax, which greatly expands the operation range of the frequency combs.
- Authors:
-
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Publication Date:
- Research Org.:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1399515
- Report Number(s):
- SAND-2017-7645J
Journal ID: ISSN 0146-9592; OPLEDP; 655526
- Grant/Contract Number:
- AC04-94AL85000
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Optics Letters
- Additional Journal Information:
- Journal Volume: 42; Journal Issue: 19; Journal ID: ISSN 0146-9592
- Publisher:
- Optical Society of America (OSA)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 47 OTHER INSTRUMENTATION
Citation Formats
Yang, Yang, Burghoff, David, Reno, John, and Hu, Qing. Achieving comb formation over the entire lasing range of quantum cascade lasers. United States: N. p., 2017.
Web. doi:10.1364/OL.42.003888.
Yang, Yang, Burghoff, David, Reno, John, & Hu, Qing. Achieving comb formation over the entire lasing range of quantum cascade lasers. United States. https://doi.org/10.1364/OL.42.003888
Yang, Yang, Burghoff, David, Reno, John, and Hu, Qing. Sun .
"Achieving comb formation over the entire lasing range of quantum cascade lasers". United States. https://doi.org/10.1364/OL.42.003888. https://www.osti.gov/servlets/purl/1399515.
@article{osti_1399515,
title = {Achieving comb formation over the entire lasing range of quantum cascade lasers},
author = {Yang, Yang and Burghoff, David and Reno, John and Hu, Qing},
abstractNote = {Frequency combs based on quantum cascade laser (QCL) are finding promising applications in highspeed broadband spectroscopy in the terahertz regime, where many molecules have their "fingerprints". To form stable combs in QCLs, an effective control of group velocity dispersion plays a critical role. The dispersion of the QCL cavity has two main parts: a static part from the material and a dynamic part from the intersubband transitions. Unlike the gain, which is clamped to a fixed value above the lasing threshold, dispersion associated with the intersubband transitions changes with bias even above the threshold, and this reduces the dynamic range of comb formation. Here, by incorporating tunability into the dispersion compensator, we demonstrate a QCL device exhibiting comb operation from Ith to Imax, which greatly expands the operation range of the frequency combs.},
doi = {10.1364/OL.42.003888},
journal = {Optics Letters},
number = 19,
volume = 42,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 2017},
month = {Sun Jan 01 00:00:00 EST 2017}
}
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