NIST SRM-2517a Hi-Res Wavelength Calibration Reference 1510-1540nm Acetylene

NIST SRM-2517a High Resolution Wavelength Calibration Reference Standard 1510-1540nm Acetylene Atomic Absorption Lines Used see photos. Includes Calibration device, certificate of Analysis (non-expiring/permanent), NIST special publication 260-133 2001-edition, example spectra, and OEM box and packaging. FC/PC connectors. Purpose: SRM 2517a is designed for calibrating the wavelength scale of instruments, particularly in the optical fiber communication region (1510-1540 nm).  Material: It consists of a single-mode optical-fiber-coupled absorption cell containing acetylene gas at a pressure of 6.7 kPa (50 Torr).  Key Feature: The use of lower acetylene pressure (compared to SRM 2517) results in narrower absorption lines, enabling higher resolution and accuracy in wavelength calibration.  Applications: It can be used to calibrate narrowband tunable lasers or lower-resolution devices like optical spectrum analyzers.  Absorption Lines: Acetylene has over 50 accurately measu