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60-fs pulses from a diode-pumped Nd:glass laser
Optics Letters
|March 1, 1997
Summary
We achieved 60-fs laser pulses using a diode-pumped Nd:glass laser and an antiresonant Fabry-Perot saturable absorber (A-FPSA). This work provides insights into optimizing saturable absorbers for stable passive mode locking.
Area of Science:
- Laser Physics
- Nonlinear Optics
Background:
- Diode-pumped solid-state lasers are crucial for various applications.
- Passive mode locking using saturable absorbers is a key technique for generating ultrashort laser pulses.
Purpose of the Study:
- To demonstrate ultrashort pulse generation from a diode-pumped Nd:glass laser.
- To investigate the factors limiting stable mode locking and explore the phenomenon of multiple pulsing.
Main Methods:
- Utilized a low-finesse antiresonant Fabry-Perot saturable absorber (A-FPSA) for mode locking.
- Employed a diode-pumped Nd:glass laser medium.
- Experimentally characterized the laser output under varying conditions of pulse energy fluence and group-velocity dispersion.
Main Results:
- Achieved 60-fs pulses with an average output power of 84 mW.
- Observed that the mode-locked spectrum spanned most of the Nd:glass fluorescence bandwidth.
- Identified multiple pulsing behavior at increased pulse energy fluence or decreased negative group-velocity dispersion.
Conclusions:
- The observed multiple pulsing is attributed to the saturation characteristics of the A-FPSA and the limited gain bandwidth.
- These findings are significant for designing effective saturable absorbers to ensure stable passive mode locking in lasers.
