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Tunable, 178-nm iodine anti-Stokes Raman laser.

J C White, D Henderson

|August 28, 2009

Summary

Researchers observed tunable vacuum ultraviolet (VUV)-stimulated emission using anti-Stokes Raman scattering. This was achieved by creating an iodine (I*) population inversion and using a 206-nm pump laser, generating 178-nm laser radiation.

Area of Science:

Laser physics
Quantum optics
Spectroscopy

Background:

Population inversion is crucial for laser operation.
Anti-Stokes Raman scattering can generate shorter wavelengths than the pump laser.
Stimulated emission in the vacuum ultraviolet (VUV) region is challenging to achieve.

Purpose of the Study:

To report the first observation of tunable, VUV-stimulated emission via anti-Stokes Raman scattering.
To demonstrate a novel method for generating VUV laser radiation.

Main Methods:

Creating a metastable iodine (I*) population inversion relative to the ground state iodine (I) via selective NaI photodissociation.
Utilizing a 206-nm pump laser to initiate the anti-Stokes Raman scattering process.

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Main Results:

Successfully generated tunable, VUV-stimulated emission at 178 nm.
Achieved a pulse energy of 35 microJ for the generated 178-nm radiation.
Demonstrated tunability of the anti-Stokes Raman-laser radiation over 10 cm(-1).

Conclusions:

The study presents a new method for VUV light generation.
The demonstrated technique offers tunability, which is valuable for spectroscopic applications.
This work opens possibilities for exploring other VUV-stimulated emission processes.