Tunable high-order sideband generation in a coupled double-cavity optomechanical system

Area of Science:

• Quantum Optics
• Optomechanics
• Nonlinear Optics

Background:

• Tunable high-order sideband generation is crucial for optical frequency combs.
• Existing methods face limitations in controlling spectral region and resolution.
• Optomechanical systems offer a promising platform for manipulating light properties.

Purpose of the Study:

• To propose a theoretical scheme for tuning both the range and interval of high-order sidebands.
• To investigate the tunability in a coupled double-cavity optomechanical system.
• To enable precise control over optical frequency comb characteristics.

Main Methods:

• Utilizing a coupled double-cavity optomechanical system.
• Simultaneous driving of the optomechanical cavity with control and probe fields.
• Driving the auxiliary cavity with a pump field, with specific frequency detuning conditions (ωb/n and ωb/m).

Main Results:

• Sideband range can be enlarged by increasing pump amplitude, coupling rate, or decreasing damping rate (n=m=1).
• Sideband interval can be tuned to ωb/m for m>1, enabling fractional-order sidebands.
• Sideband interval can be diminished by increasing m and pump amplitude.

Conclusions:

• The proposed scheme offers effective control over high-order sideband generation.
• This provides a pathway for realizing optical frequency combs with adjustable spectral properties.
• The theoretical framework lays the groundwork for experimental implementation.