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Quasi-light Storage for Optical Data Packets
Published on: February 6, 2014
A deep-UV optical frequency comb at 205 nm
E Peters1, S A Diddams, P Fendel
1Max Planck Institute of Quantum Optics, Hans-Kopfermann-Str. 1, D-85748 Garching, Germany. elisabeth.peters@mpq.mpg.de
Optics Express
|May 26, 2009
Summary
Researchers generated a deep ultraviolet frequency comb at 205 nm using a Ti:sapphire laser. This novel method offers a powerful tool for advanced spectroscopic applications.
Area of Science:
- Quantum optics
- Laser physics
- Spectroscopy
Background:
- Frequency combs are precise laser sources used in metrology and spectroscopy.
- Generating deep ultraviolet (UV) light (below 300 nm) with frequency combs is challenging.
- Picosecond pulse lasers offer unique properties for nonlinear frequency conversion.
Purpose of the Study:
- To develop a method for generating a deep UV frequency comb at 205 nm.
- To achieve efficient nonlinear frequency conversion of a Ti:sapphire laser output.
- To enable new spectroscopic applications requiring deep UV light.
Main Methods:
- Frequency quadrupling of a picosecond pulse train from a Ti:sapphire laser at 820 nm.
- Utilizing two successive frequency doubling stages within matched resonant cavities.
- Operating at a pulse repetition rate of 82 MHz.
Main Results:
- Generation of a frequency comb at 205 nm with nearly bandwidth-limited pulses.
- Achieved an overall nonlinear frequency conversion efficiency of 4.5%.
- Produced output powers of up to 70 mW for short durations and 25 mW for continuous operation.
Conclusions:
- The developed deep UV frequency comb is a viable alternative to continuous wave laser conversion for spectroscopy.
- This technology opens possibilities for high-resolution spectroscopy in the deep UV range.
- The high efficiency and power output make this a practical tool for scientific research.
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