Microwave photonic injection locking frequency divider based on a tunable optoelectronic oscillator

Area of Science:

• Photonics
• Microwave Engineering
• Electrical Engineering

Background:

• Traditional frequency dividers face limitations in tuning range and bandwidth.
• Optoelectronic oscillators (OEOs) offer high-frequency signal generation capabilities.
• Microwave photonic filters provide tunable filtering solutions.

Purpose of the Study:

• To introduce a novel broadband divide-by-2 microwave photonic injection locking frequency divider (ILFD).
• To enhance the tuning range of ILFDs by incorporating a tunable microwave photonic filter.
• To demonstrate a wide operating frequency range for the proposed ILFD.

Main Methods:

• Utilizing a dual-loop optoelectronic oscillator (OEO) as the core component.
• Replacing traditional electrical filters with a tunable microwave photonic filter.
• Implementing injection locking for frequency division.
• Experimentally demonstrating divide-by-2 and divide-by-3 frequency division.

Main Results:

• Achieved a wide operating frequency range from 4.51 GHz to 34.88 GHz for the divide-by-2 ILFD.
• Demonstrated that the ILFD's frequency range is determined by the tunable OEO.
• Successfully demonstrated a divide-by-3 ILFD using a frequency mixer.

Conclusions:

• The proposed microwave photonic ILFD offers a significantly larger tuning range compared to traditional methods.
• The integration of tunable microwave photonic filters enhances the flexibility and bandwidth of frequency dividers.
• This technology holds promise for advanced microwave and millimeter-wave applications requiring wideband frequency division.