Br lamp for F2 laser wavelength calibration

Recently, we have developed a novel Br lamp for the F2 laser wavelength calibration. In order to examine the validity of this lamp, we measured emission lines of this lamp in 157 nm region and analyzed them. From our result, it has been confirmed that the spectral profile of the 157.6387 nm (2P3/2 - 4P5/2) emission line of Br atom is unchangeable to the parameters of lamp designs and lamp operating conditions. One of the reasons will be shown here. Hence our novel Br lamp is to be the promising candidate for the 157 nm F2 laser wavelength calibration.