Investigation of the Absorption Lines of a Kr - Ne Mixture in the Near Infrared Region Detected by Opto-galvanic Spectroscopy

Abstract

In this work the optical absorptions of the Krypton 84 1 s2 - 2 p8 between 1270-1640 nm are analyzed to be used for an optical wavelength standard in this regime. The spectrum was measured using opto-galvanic spectroscopy which shows higher sensitivity than direct optical absorption spectroscopy. More than 30 usable absorption lines have been determined. Here, all absorption lines of the Krypton / Neon mixed gas were summarized which can be used in the transmission range of 1270 nm to 1640 nm. Additionally, a wavelength drift of the detected lines was measured using a climate chamber between 10°C and 50°C. Combining the Galvatron absorption of Kr lines with active feedback to a multi-channel laser comb source, we propose this system to be used as a secondary reference source for the calibration of spectral analyzers or in optical WDM networks.

Keywords

• wavelength division multiplex systems wdm
• optical wavelength references
• optical networks
• opto-galvanic spectroscopy