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Two-stage transient stimulated Raman chirped-pulse amplification in KGd(WO4)2 with compression to 145 fs
Optics Letters
|December 16, 2020
Summary
We achieved efficient amplification of supercontinuum pulses using a two-stage Raman amplifier. This method produced high-energy, short pulses, advancing laser technology.
Area of Science:
- Laser physics
- Nonlinear optics
- Materials science
Background:
- Supercontinuum generation is crucial for various spectroscopic applications.
- Efficient amplification of these broadband pulses is a key challenge.
- Potassium gadolinium tungstate (KGW) crystals are promising laser gain media.
Purpose of the Study:
- To demonstrate efficient amplification of chirped supercontinuum pulses.
- To investigate the performance of a two-stage stimulated Raman amplifier.
- To utilize KGW crystals for high-energy pulse generation.
Main Methods:
- Employed a two-stage stimulated Raman amplifier.
- Utilized double tungstate (KGW) crystals.
- Pumped the system with 1.2 ps transform-limited pulses at 1030 nm.
Main Results:
- Achieved 55% conversion efficiency in the second amplification stage.
- Generated output pulses with 0.6 mJ energy at 1135 nm.
- Expanded the Stokes bandwidth 10-fold, enabling 145 fs pulse compression.
Conclusions:
- The two-stage KGW Raman amplifier efficiently amplifies supercontinuum pulses.
- This approach yields high-energy, ultrashort pulses suitable for advanced applications.
- Demonstrated a viable method for broadband pulse amplification.
