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Vol. 245, Issue 6, October 2020, pp. 76-82




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

U. H. P. Fischer and M. Schröder

University Applied Sciences, Friedrichstr. 57, 38855 Wernigerode, Germany

Tel.: + 49 3943659 351, fax: + 49 3943659 5351 E-mail: ufischer@hs-harz.de


Received: 30 July 2020 /Accepted: 23 September 2020 /Published: 30 October 2020

Digital Sensors and Sensor Sysstems


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.


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