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Ultraviolet ultrafast pump-probe laser based on a Ti:sapphire laser system
Optics Letters
|October 22, 2009
Summary
This study presents an ultrafast spectroscopic apparatus for detecting ultraviolet time-resolved spectra. The system enables subpicosecond spectroscopy in the deep-ultraviolet range.
Area of Science:
- Spectroscopy
- Ultrafast laser systems
- Nonlinear optics
Background:
- Ultrafast spectroscopy requires precise temporal resolution.
- Generating deep-ultraviolet (UV) pulses is challenging.
- Ti:sapphire laser systems are versatile for ultrafast applications.
Purpose of the Study:
- To describe an ultrafast spectroscopic pump-probe apparatus.
- To enable detection of time-resolved ultraviolet spectra.
- To facilitate subpicosecond spectroscopy in the deep-UV range.
Main Methods:
- Utilizing a 0.3-TW Ti:sapphire laser system operating at 810 nm.
- Employing frequency doubling to generate 165-fs pulses at 405 nm.
- Implementing frequency tripling to achieve 0.8-mJ pulses at 270 nm.
- Generating an ultraviolet supercontinuum from 200 to 600 nm in water.
Main Results:
- Successful generation of 165-fs pulses at 405 nm with 15-mJ energy.
- Achieved 0.8-mJ pulse energy at 270 nm via frequency tripling.
- Created a broad ultraviolet supercontinuum (200–600 nm).
- The apparatus operates at a 5-Hz repetition rate.
Conclusions:
- The developed apparatus is effective for ultrafast spectroscopic measurements.
- The system provides a versatile tool for deep-ultraviolet pump-probe spectroscopy.
- This technology advances the study of ultrafast phenomena in the UV spectrum.
