Abstract

Quantum cascade lasers (QLCs) are semiconductor devices, which are the dominant light source in the mid-IR part of the electromagnetic spectrum [1], and have recently been demonstrated to operate as frequency combs [2]. Characteristics of the comb operation are a broad, phase-locked optical spectrum of equidistant modes, and a strong narrow radio frequency (RF) beatnote, that is generated from the beating of those modes. One unique property of the QCL is the short upper-state lifetime, which allows the coupling between the injected current and the beatnote at the roundtrip frequency.

© 2019 IEEE

PDF Article

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription