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Diode-pumped passively mode-locked Yb:YLF laser.
N Coluccelli1, G Galzerano, L Bonelli
1Istituto di Fotonica e Nanotecnologie - CNR and Dipartimento di Fisica del Politecnico di Milano, 20133 Milano, Italy. nicola.coluccelli@polimi.it
Optics Express
|June 11, 2008
Summary
We achieved passive mode-locking in a diode-pumped Ytterbium-doped Yttrium Lithium Fluoride (Yb:YLF) laser using a semiconductor saturable-absorber mirror. This resulted in ultrashort pulses of 196 fs, demonstrating efficient laser performance.
Area of Science:
- Laser physics
- Materials science
- Optoelectronics
Background:
- Diode-pumped solid-state lasers are crucial for various applications.
- Passive mode-locking enhances laser pulse characteristics.
- Ytterbium-doped YLF (Yb:YLF) offers desirable spectroscopic properties for laser operation.
Purpose of the Study:
- To demonstrate passive mode-locking in a diode-pumped Yb:YLF laser.
- To investigate the performance of a semiconductor saturable-absorber mirror (SESAM) for mode-locking.
- To characterize the generated ultrashort laser pulses.
Main Methods:
- Utilized a semiconductor saturable-absorber mirror (SESAM) for passive mode-locking.
- Employed a diode-pumped Yb:YLF laser system.
- Performed spectroscopic measurements and analyzed mode-locking performance.
Main Results:
- Achieved stable passive mode-locking with pulse durations as short as 196 femtoseconds (fs).
- Obtained an average output power of 54 milliwatts (mW) at a repetition rate of 55 megahertz (MHz).
- Observed an optical spectrum centered at 1028 nm with a 7.1-nm bandwidth, indicating nearly transform-limited pulses.
Conclusions:
- Passive mode-locking using a SESAM is effective in diode-pumped Yb:YLF lasers.
- The demonstrated laser system generates high-quality ultrashort pulses.
- This work contributes to the development of advanced ultrafast laser sources.
