Optics: measuring and testing – For optical fiber or waveguide inspection
Patent
1997-02-04
1998-01-13
McGraw, Vincent P.
Optics: measuring and testing
For optical fiber or waveguide inspection
25022715, G01N 2188
Patent
active
057085005
ABSTRACT:
A multimode optical time domain reflectometer has first and second wavelength optical transmitters for launching optical pulses into a fiber under test and optical receivers responsive to the respective wavelengths for converting the optical return signals from the test filer into electrical signals for acquiring waveform data representative of the optical return signals at the respective wavelengths. A processor receives the waveform data and determines a difference in fiber slopes between the optical return signal at the respective wavelengths and adds the fiber slope difference to the waveform data of the second optical return signal for producing composite waveform data having a uniform fiber slope for the waveform data acquired at the first and second wavelengths. A multimode optical time domain reflectometer of this design provides improved two point resolution for 1310 nm testing of multimode optical fiber.
REFERENCES:
patent: 5008535 (1991-04-01), Anderson et al.
patent: 5155439 (1992-10-01), Holmbo et al.
patent: 5365328 (1994-11-01), Anderson
patent: 5528356 (1996-06-01), Harcourt
Bucher William K.
McGraw Vincent P.
Tektronix Inc.
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