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Self-stabilization of carrier-envelope offset phase by use of difference-frequency generation
Takao Fuji1, Alexander Apolonski, Ferenc Krausz
1Photonics Institute, Vienna University of Technology, Gusshausstrasse 27/387 A-1040, Vienna, Austria. fuji@tuwien.ac.at
Optics Letters
|March 24, 2004
Summary
Researchers stabilized carrier-envelope offset phase using difference-frequency generation. This technique broadens Ti:sapphire laser spectra in photonic crystal fiber, enabling precise control for applications like injection seeding.
Area of Science:
- * Laser Physics
- * Nonlinear Optics
Background:
- * Stabilizing the carrier-envelope offset phase (CEO) is crucial for precision spectroscopy and frequency comb generation.
- * Traditional methods for CEO stabilization can be complex and limited in tuning range.
Purpose of the Study:
- * To demonstrate a novel method for achieving self-stabilized carrier-envelope offset phase using difference-frequency generation.
- * To explore the tunability of the generated difference-frequency signal for potential applications.
Main Methods:
- * Broadening the spectrum of a Ti:sapphire oscillator in a photonic crystal fiber.
- * Generating a difference-frequency (DF) signal at 900 nm by mixing spectral components at 490 nm and 1080 nm.
- * Observing the beat signal between the fundamental and the DF signal to confirm phase stabilization.
Main Results:
- * Successful generation and observation of a beat signal between the fundamental and the DF signal, indicating CEO stabilization.
- * The generated DF signal was tunable down to 780 nm.
- * The DF signal's tunability makes it suitable for injection seeding a Ti:sapphire oscillator.
Conclusions:
- * Difference-frequency generation provides an effective route to self-stabilized carrier-envelope offset phase.
- * The demonstrated technique offers a tunable source for advanced laser applications.
- * This method has potential for improving the performance of Ti:sapphire oscillators.