Emission spectra of microplasma generated by femtosecond laser pulses

Xiaonong Zhu; Rulian Fu

doi:10.1117/12.481796

5 September 2002 Emission spectra of microplasma generated by femtosecond laser pulses

Xiaonong Zhu, Rulian Fu

Proceedings Volume 4914, High-Power Lasers and Applications II; (2002) https://doi.org/10.1117/12.481796
Event: Photonics Asia, 2002, Shanghai, China

Abstract

Laser-induced breakdown spectra (LIBS) produced in ambient air and pure gases with tightly focused, micro Joule, femtosecond Ti:sapphire laser pulses have been studied experimentally. The breakdown region typically measures around 10 µm in diameter and 120 µm in length. Both line spectrum and blue-shifted continuum spectrum are recorded for air, N2, O2, Ar, Kr, and Xe when the optical intensity reaches 1014W/cm2, using 40 fs pulses. It is also found that the profile of the continuum varies only slightly for different gases. For a given gas the continuum profile changes along different positions of the narrow micro plasma track. In particular, the blue-shifted continuum is stronger at the initial position of the plasma track (closer to the focal lens), whereas the line spectrum is more dominant when light collection is made at the further end of the plasma track. Unlike the results reported by others for longer pulses, higher energy and also larger plasma zone, the majority of line spectrum we obtained is found around 800 nm, the central wavelength ofthe input Ti:sapphire pulses.

Citation Download Citation

Xiaonong Zhu and Rulian Fu "Emission spectra of microplasma generated by femtosecond laser pulses", Proc. SPIE 4914, High-Power Lasers and Applications II, (5 September 2002); https://doi.org/10.1117/12.481796

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available