Pulse compression and shaping of broadband optical parametric amplifier laser source

Area of Science:

• Optics and Photonics
• Laser Physics
• Nonlinear Optics

Background:

• Broadband laser sources are crucial for advanced spectroscopic techniques.
• Optical parametric amplifiers (OPAs) offer tunable broadband output.
• Controlling pulse characteristics is essential for maximizing laser performance.

Purpose of the Study:

• To report pulse compression and shaping of a broadband OPA laser source.
• To demonstrate amplitude and phase control of femtosecond laser pulses.
• To establish a novel laser source for seeding amplification stages and time-resolved spectroscopy.

Main Methods:

• Generation of a 100 Hz broadband OPA laser source via self-phase modulation in hollow-core fiber.
• Utilizing an acousto-optic programmable dispersive filter (AOPDF) for pulse manipulation.
• Characterization of compressed 1300 nm, 20 fs laser pulses with energies up to 10 microJ.

Main Results:

• Successful pulse compression and shaping of the broadband OPA output.
• Demonstrated precise amplitude and phase control of femtosecond pulses.
• Achieved high-energy (10 microJ) 20 fs pulses at 1300 nm.

Conclusions:

• The developed method provides effective control over broadband OPA laser pulses.
• The novel laser source is suitable for seeding subsequent OPA amplification.
• The capabilities are ideal for applications in time-resolved spectroscopy.