Diode-pumped Yb3+:KYF4 femtosecond laser

Area of Science:

• Laser Physics
• Materials Science

Background:

• Diode-pumped solid-state lasers are crucial for various applications.
• Yb(3+)-doped fluoride crystals offer potential for efficient laser operation.
• Passive mode locking enables generation of ultrashort laser pulses.

Purpose of the Study:

• To demonstrate passive mode locking of a diode-pumped Yb(3+):KYF(4) laser.
• 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(3+):KYF(4) laser gain medium.
• Measured pulse duration, repetition rate, output power, and timing jitter.

Main Results:

• Achieved stable, transform-limited pulse train generation.
• Obtained a repetition rate of 57 MHz.
• Generated solitonlike pulses with minimum duration of 170 fs.
• Reached maximum average output power of 250 mW.
• Recorded root-mean-square (rms) time jitter of 360 fs.

Conclusions:

• Passive mode locking of Yb(3+):KYF(4) lasers is feasible and effective.
• The demonstrated laser system produces high-quality ultrashort pulses.
• This work contributes to the development of advanced ultrafast laser sources.