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

Published

October 1, 2002

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

Pub Type

Journals

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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 December 26, 2024)