Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Line Centers, Pressure Shift, and Pressure Broadening of 1530-1560 nm Hydrogen Cyanide Wavelength Calibration Lines

Published

Author(s)

William C. Swann, Sarah L. Gilbert

Abstract

We have measured the line centers and pressure-induced shift and broadening of 25 lines in the 2Ņ3 rotational-vibrational band of hydrogen cyanide H13C14N. These lines can be used as wavelength references in the optical fiber communication wavelength division multiplexing C-band (approximately 1530-1565 nm). We find that the pressure shift varies with line number from +0.09 pm/kPa to -0.15 pm/kPa (about -1.5 to +2.5 MHz/Torr). The pressure broadening also varies with line number and is typically between 1 and 5.4 pm/kPa (17 to 90 MHz/Torr). We determined the line centers of 21 lines with an expanded uncertainty (2τ) of 0.01 pm (about 1 MHz), an improvement of more than an order of magnitude over previous line center measurements of this band. We also calculate the molecular constants for the band.
Citation
Journal of the Optical Society of America B-Optical Physics
Volume
22
Issue
8

Keywords

absorption, HCN, hydrogen cyanide, molecular spectroscopy, optical fiber communications, pressure broadening, pressure shift, Standard Reference Material, wavelength calibration, wavelength division multiplexing, wavelength reference, wavelength standards, WDM

Citation

Swann, W. and Gilbert, S. (2005), Line Centers, Pressure Shift, and Pressure Broadening of 1530-1560 nm Hydrogen Cyanide Wavelength Calibration Lines, Journal of the Optical Society of America B-Optical Physics, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=31781 (Accessed April 12, 2024)
Created July 31, 2005, Updated October 12, 2021