Line-narrowed gas laser system

Details Line-narrowed gas laser system Line-narrowed gas laser system

2006-07-04

2006-07-04

Menefee, James (Department: 2828)

Coherent light generators

Particular active media

Gas

C372S057000

Reexamination Certificate

active

07072375

ABSTRACT:
In a line-narrowed gas laser system such as a line-narrowed molecular fluorine laser system, ASE is cut off to obtain a spectral linewidth of 0.2 pm or lower and a spectral purity of 0.5 pm or lower. The laser system comprises a laser chamber filled with an F2-containing laser gas, discharge electrodes located in the laser chamber, a laser resonator and a line-narrowing module located in the laser resonator with a wavelength selection element, so that a line-narrowed laser beam emerges from the laser resonator. To cut off ASE from the laser beam emerging from the laser resonator, the duration from laser emission by discharge to generation of a laser beam is preset. Rise of the sidelight is made so gentle that the starting point of a laser pulse can exist after the time of the first sidelight peak.

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