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Tunable optical microwave generation using self-injection locked monolithic dual-wavelength amplified feedback laser
Optics Letters
|December 10, 2014
Summary
This study presents a new method for generating tunable optical microwaves using a dual-wavelength laser. The technique significantly narrows the linewidth of the microwave signal, improving its quality for various applications.
Area of Science:
- Optics and Photonics
- Microwave Engineering
- Laser Physics
Background:
- Optical microwave generation is crucial for high-frequency applications.
- Achieving narrow linewidths in optical microwave signals is challenging.
- Existing methods often lack tunability or require complex setups.
Purpose of the Study:
- To propose and demonstrate a tunable optical microwave generation scheme.
- To improve the linewidth of optical microwave signals.
- To achieve tunability over a specific frequency range.
Main Methods:
- Utilizing a self-injection locked monolithic dual-wavelength amplified feedback laser (AFL).
- Implementing a dual-loop feedback scheme to control laser modes.
- Experimentally demonstrating the proposed optical microwave generation.
Main Results:
- Successfully generated tunable optical microwaves from 30 to 38 GHz.
- Reduced the 3-dB linewidth of the optical microwave output from MHz to kHz scale.
- Achieved a 3-dB linewidth below 2 kHz.
Conclusions:
- The proposed scheme effectively generates tunable optical microwaves with narrow linewidths.
- The dual-loop feedback method is key to linewidth reduction.
- This technique offers a promising solution for high-quality optical microwave generation.
