Patent ID: 7304748
Filing Date: 2007-12-04
Classification: G01J

Abstract:
1. A bandwidth meter for measuring the bandwidth of a spectrum of light emitted from a laser input to the bandwidth meter comprising: an optical dispersive instrument configured to disperse energy in the light emitted from the laser, the dispersion converting the emitted light from a wavelength domain into a spatial domain or temporal domain based on the wavelength distribution of the light energy from the laser; a detector configured to record a spatial variation or a temporal variation of the wavelength distribution of the light energy, the detector further configured to provide an output signal based on the recorded spatial variation or temporal variation, wherein the output signal comprises a first spectrum width and a second spectrum width; and a bandwidth calculation apparatus configured to calculate an actual bandwidth parameter utilizing the first spectrum width and the second spectrum width as part of a multivariable equation employing predetermined calibration variables specific to the optical dispersive instrument.