Nonlinear frequency chirps from a stabilized injected phase-modulated fiber laser loop
Résumé
A phase-modulated frequency-shifting loop is injected by a single-frequency laser at 1.5 μm. In so-called Talbot conditions, i.e., when the modulation frequency is an integer multiple of the inverse of the cavity round-trip time, the loop generates a frequency comb whose temporal trace consists in a train of pulse doublets whose positions in time depend on the frequency of the injection laser. When the modulation frequency is slightly detuned from the Talbot condition, nonlinear frequency chirps are predicted and observed in the output pulse train. We demonstrate that these nonlinear chirps are not restricted to sinusoidal shapes, and also that the loop can be stabilized by exploiting the intracavity phase modulation.
Mots clés
Frequency comb
Physics
Frequency modulation
Optics
Loop (graph theory)
Nonlinear system
Modulation (music)
Laser
Phase (matter)
Pulse (music)
Phase modulation
Pulse wave
Fiber laser
Talbot effect
Acoustics
Phase noise
Radio frequency
Mathematics
Telecommunications
Computer science
Quantum mechanics
Combinatorics
Detector
Grating
Domaines
Sciences de l'ingénieur [physics]| Origine | Fichiers éditeurs autorisés sur une archive ouverte |
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