Summary
International Symposium on Nonlinear Theory and Its Applications
2022
Session Number:B2L-C
Session:
Number:B2L-C-01
Tunable Period-One Dynamical Millimeter-Wave Generation by Cascaded Injection of Lasers
Luan Zhang , Sze-Chun Chan,
pp.275-278
Publication Date:12/12/2022
Online ISSN:2188-5079
Summary:
For generating tunable photonic millimeter-wave (mm-wave) signals, the period-one (P1) nonlinear dynamics of semiconductor lasers are investigated through cascaded optical injection. Starting from a continuous-wave master laser, a primary slave laser is optically injected into P1 dynamics at a microwave frequency f0. It in turn injects a secondary slave laser that enhances the harmonic component of the intensity oscillations at 2f0, which is typically in the mm-wave band. By applying on the injection a subharmonic modulation at f0/3, the frequency fluctuation of the harmonic component is stabilized. By adjusting the operating conditions of lasers, the wide frequency tunability of P1 dynamics enables the continuous tuning of 2f0. Experimentally, tunable photonic mm-wave generation of 2f0 is demonstrated from 36 GHz to 42 GHz, while the electrical linewidth is maintained below 300 Hz by the subharmonic modulation.