Analytical expression for the width of quantum cascade laser frequency comb
Abstract
An analytical expression for the maximum potential bandwidth of the frequency modulated comb naturally occurring in free running quantum cascade lasers (QCLs) has been derived. The maximum bandwidth is not as wide as the one attainable in passively mode locked lasers, but wider than that in the actively mode locked ones. The bandwidth is shown to critically depend on the flatness of the gain spectrum and the cavity length and less so on pump current. The results firmly establish that the performance of QCL frequency combs can be on par with combs generated by other means.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Oct 19, 2020
- Source ID
- 10.1063/5.0029588
Entities
People
- Jacob B Khurgin
Organizations
- Air Force Office of Scientific Research
- Johns Hopkins University