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Frequency-modulation mode locking of a Nd(3+)-doped fiber laser
Optics Letters
|September 15, 2009
Summary
Frequency-modulation mode locking was achieved in a neodymium-doped fiber laser, producing 20-picosecond pulses. These pulses are bandwidth-limited with a sech(2) profile, indicating efficient laser operation.
Area of Science:
- Laser Physics
- Optics and Photonics
Background:
- Neodymium-doped (Nd3+) fiber lasers are crucial for various applications.
- Mode locking is essential for generating ultrashort laser pulses.
Purpose of the Study:
- To investigate frequency-modulation (FM) mode locking in a Nd3+-doped fiber laser.
- To characterize the properties of the generated ultrashort pulses.
Main Methods:
- Utilized frequency-modulation mode locking with a bulk phase modulator.
- Operated the Nd3+-doped fiber laser at a wavelength of 1.09 micrometers.
- Analyzed pulse characteristics using second-harmonic-intensity autocorrelation and time-bandwidth product measurements.
Main Results:
- Successfully achieved FM mode locking in the Nd3+-doped fiber laser.
- Generated laser pulses with a full width at half maximum (FWHM) duration of 20 picoseconds.
- Obtained a peak power of 1 Watt for the generated pulses.
- Determined a time-bandwidth product of 0.30 ± 0.04, consistent with bandwidth-limited sech(2) pulse profiles.
Conclusions:
- The implemented FM mode locking technique effectively produces high-quality, bandwidth-limited pulses from a Nd3+-doped fiber laser.
- The results demonstrate the potential of this laser system for applications requiring ultrashort, high-peak-power pulses.
