Chirped pulse amplification based on praseodymium-doped fluoride fibers

Area of Science:

• Optics and Photonics
• Laser Physics
• Materials Science

Background:

• Ultrashort pulse generation is crucial for various scientific applications.
• Praseodymium-doped fluoride fibers (Pr:ZBLAN) offer potential for 1300 nm laser development.
• Chirped pulse amplification (CPA) is a key technique for achieving high-power ultrashort pulses.

Purpose of the Study:

• To develop a chirped pulse amplification (CPA) system for generating ultrashort 1300 nm pulses.
• To utilize praseodymium-doped fluoride fibers (Pr:ZBLAN) as the gain medium.
• To achieve high average power and femtosecond pulse durations at 1300 nm.

Main Methods:

• A 1300 nm seed pulse was generated via soliton-dispersive wave coupling in a nonlinear fiber.
• The seed pulse was stretched to ~150 ps using a grating stretcher.
• A two-stage Pr:ZBLAN amplifier was employed for pulse amplification.
• Grating-based pulse compression was used to achieve femtosecond durations.

Main Results:

• The CPA system successfully generated ultrashort 1300 nm pulses.
• An average output power of ~112 mW was achieved at a 40 MHz repetition rate.
• The amplified pulses were compressed to a final duration of 225 fs.
• Minimal phase distortion was observed after pulse compression.

Conclusions:

• A robust chirped pulse amplification system for 1300 nm ultrashort pulses was successfully demonstrated.
• The use of Pr:ZBLAN fibers is effective for amplifying 1300 nm pulses.
• The developed system provides a valuable tool for research requiring high-power, ultrashort pulses at 1300 nm.