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Pressure-induced shift and broadening of 1560-1630 nm carbon monoxide wavelength calibration lines

Published

Author(s)

William C. Swann, Sarah L. Gilbert

Abstract

We have measured the line centers and pressure-induced shift of 14 lines in the 3 Ņ rotational-vibrational band of carbon monoxide 12C16O and 18 lines in the corresponding band of 13C16O. These lines can be used as wavelength references in the optical fiber communication wavelength-division multiplexing L-band (approximately 1565-1625 nm). The 12C16O spectrum has useful reference lines from 1560 to 1595 nm, and the 13C16O spectrum has lines from 1595 to 1630 nm. We observed that, except for a shift of 35 nm toward longer wavelengths for the 13C16O spectrum, the behaviors of the two isotopic species are similar. We found that the pressure shift varies with line number, from about +0.01 pm/kPa to +0.02 pm/kPa (about 0.16 to 0.31 MHz/Torr). In addition, we have measured the pressure broadening of these lines; we find that it also varies with line number and is typically 0.3 - 0.4 pm/kPa (approximately 5 to 7 MHz/Torr).
Citation
Journal of the Optical Society of America B-Optical Physics
Volume
19
Issue
10

Keywords

carbon monoxide, molecular spectroscopy, pressure broadening, pressure shift, wavelength calibration, wavelength division multiplexing, wavelength reference, wavelength standards, WDM

Citation

Swann, W. and Gilbert, S. (2002), Pressure-induced shift and broadening of 1560-1630 nm carbon monoxide wavelength calibration lines, Journal of the Optical Society of America B-Optical Physics, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=2731 (Accessed April 13, 2024)
Created September 30, 2002, Updated October 12, 2021