Linear-cavity Er-doped fiber mode-locked laser with large wavelength tunability

Area of Science:

• Optics and Photonics
• Fiber Laser Technology
• Wavelength-Tunable Lasers

Background:

• Mode-locked fiber lasers are crucial for high-speed optical systems.
• Achieving wavelength tunability and high repetition rates simultaneously presents a challenge.
• Polarization-maintaining fiber components enhance laser stability and robustness.

Purpose of the Study:

• To propose and implement a novel linear-type, all-polarization-maintaining fiber mode-locked laser.
• To demonstrate significant wavelength tunability within the C-band.
• To achieve a high repetition rate for advanced applications.

Main Methods:

• Utilized an Er-doped fiber and polarization-maintaining fiber components.
• Designed a linear-type laser cavity for compactness and efficiency.
• Employed mode-locking techniques to generate ultrashort pulses.

Main Results:

• Achieved a center wavelength tuning range from 1533.7 nm to 1565.6 nm.
• Demonstrated the highest repetition rate of 126.5 MHz for C-band tunable mode-locked lasers.
• Confirmed reliable operating robustness due to polarization-maintaining fiber components.

Conclusions:

• The proposed linear-type laser offers a unique combination of wavelength tunability and high repetition rate.
• Its compact design and robust operation make it suitable for demanding applications.
• Potential applications include optical communications, LIDAR, and high-precision ranging.