Reducing electromagnetic feedback during laser shock peening

Details Reducing electromagnetic feedback during laser shock peening Reducing electromagnetic feedback during laser shock peening

2005-07-12

2005-07-12

Elve, M. Alexandra (Department: 1725)

Electric heating

Metal heating

By arc

C219S121780

Reexamination Certificate

active

06917012

ABSTRACT:
A laser shock peening apparatus includes a laser unit for generating at least one laser beam aimed at a laser shock peening area and an anti-feedback means for preventing electromagnetic radiation reflections from the target area from entering the laser unit during laser shock peening and the anti-feedback means is located between the laser unit and a final focusing lens. The anti-feedback means may include an optical isolator at an output of the laser unit such as a faraday isolator. Alternative optical isolators may include thin film polarizers, glan prism polarizers, independent pig tailed optical isolators, mirrors with enhanced P or S polarization coatings. The laser unit may include an oscillator and a final amplifier and the output of the laser unit located after the final amplifier.

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