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500 MHz spaced Yb:fiber laser frequency comb without amplifiers
Optics Letters
|May 3, 2014
Summary
A novel Ytterbium-doped fiber laser directly generated an optical frequency comb
Area of Science:
- Physics
- Laser Technology
- Optical Engineering
Background:
- Optical frequency combs are crucial for precision measurements.
- Direct generation of the comb's carrier-envelope offset frequency (fCEO) simplifies systems.
- Previous methods required amplification, limiting repetition rates.
Purpose of the Study:
- To demonstrate direct fCEO generation from a Yb:ring fiber laser oscillator.
- To achieve high repetition rates above 500 MHz.
- To achieve stable operation without complex environmental controls.
Main Methods:
- Utilized a Ytterbium-doped (Yb) ring fiber laser.
- Directly generated the carrier-envelope offset frequency (fCEO).
- Stabilized the offset frequency and repetition rate.
Main Results:
- First demonstration of direct fCEO generation above 500 MHz repetition rate.
- Achieved a signal-to-noise ratio > 40 dB for the offset frequency.
- Stabilized the offset frequency for over 6 hours in open air.
- Attained in-loop tracking stability of 4.46×10(-13)/τ(1/2) for the repetition rate.
Conclusions:
- Direct fCEO generation from Yb:ring fiber lasers is feasible at high repetition rates.
- The demonstrated system offers robust and stable operation.
- This advancement simplifies optical frequency comb technology for broader applications.
