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Fiber-laser-based frequency comb with a tunable repetition rate
Optics Express
|June 2, 2009
Summary
A tunable fiber laser generates a phase-locked frequency comb with adjustable spacing. This self-referenced optical frequency comb is ideal for precise metrology and synchronization applications.
Area of Science:
- Optics and Photonics
- Laser Physics
- Metrology
Background:
- Frequency combs are precise optical rulers.
- Mode-locked fiber lasers offer compact and stable laser sources.
- Tunable repetition rates in lasers enable flexible frequency comb spacing.
Purpose of the Study:
- To present a phase-locked, self-referenced frequency comb.
- To demonstrate tunability of the comb's repetition rate.
- To highlight applications in metrology and laser synchronization.
Main Methods:
- Utilizing a mode-locked fiber soliton laser.
- Implementing a phase-locked loop to stabilize the comb.
- Scanning the laser's repetition rate from 49.3 MHz to 50.1 MHz.
Main Results:
- A self-referenced frequency comb with tunable spacing was successfully generated.
- The comb's repetition rate was phase-locked to a radio frequency source.
- Demonstrated tunability across a specific frequency range.
Conclusions:
- The developed tunable repetition rate frequency comb is a versatile tool.
- Potential applications include wavelength and length metrology.
- Suitable for synchronizing fiber laser frequency combs and creating precise swept wavelength sources.
