Patent ID: 9377377
Filing Date: 2016-06-28
CPC Classification: G01M,H04B

Claim Text:
1. A method of measuring a modal bandwidth BW(λ) as a function of wavelength of a multimode optical fiber under test, comprising: a) emitting polarized light from a single-mode fiber connected to a light source light at a select wavelength within a wavelength range; b) frequency-modulating the polarized light over a range of frequencies to form frequency-modulated polarized light; c) exciting multiple modes of the multimode optical fiber under test using the frequency-modulated polarized light, and transmitting the multiple modes through the multimode optical fiber under test to form transmitted light; d) detecting the transmitted light and calculating a first bandwidth BW e) repeating acts a) through d) for at least two more select wavelengths within the wavelength range to calculate second and third bandwidths BW