Tunable Kerr frequency combs and temporal localized states in time-delayed Gires-Tournois interferometers

Area of Science:

• Photonics and Optical Physics
• Nonlinear Optics
• Quantum Optics

Background:

• Temporal localized states (TLSs) are crucial for advanced optical signal processing.
• Frequency combs are essential tools in metrology and spectroscopy.
• Existing methods for generating TLSs and frequency combs often lack tunability and compactness.

Purpose of the Study:

• To theoretically investigate a novel, compact micro-cavity setup for generating temporal localized states (TLSs) and frequency combs.
• To explore the tunability and potential high-power operation of the proposed system.
• To disclose the coexistence of multistable dark and bright TLSs.

Main Methods:

• Theoretical study of a vertically emitting micro-cavity system.
• Operation in the Gires-Tournois regime with a Kerr medium.
• Inclusion of strong time-delayed optical feedback and detuned optical injection.

Main Results:

• Demonstration of a compact (few centimeters) setup for TLS and frequency comb generation.
• Tunable repetition rates and potential for high power operation.
• Observation of coexisting multistable dark and bright TLSs on bistable homogeneous backgrounds.

Conclusions:

• The proposed micro-cavity system offers a promising, integrated platform for generating tunable temporal localized states and frequency combs.
• The observed multistability of dark and bright TLSs opens new avenues for optical switching and information processing.
• The compact and technologically feasible design facilitates practical implementation.