Optical fiber backscatter signature generator (OFBSG)

Details Optical fiber backscatter signature generator (OFBSG) Optical fiber backscatter signature generator (OFBSG)

1989-05-03

1990-08-28

McGraw, Vincent P.

Optics: measuring and testing

For optical fiber or waveguide inspection

G01N 2184, G01N 2188

Patent

active

049520571

ABSTRACT:
The optical fiber backscatter signal generator (OFBSG) generates simulated ptical fiber backscatter waveform signals that are used to characterize or calibrate an optical time-domain reflectometer (OTDR). An OTDR is a commercially available test instrument that measures loss and length of a fiber optic cable by launching an optical signal into the cable and measuring the power that is reflected back (backscattered) into the OTDR. The OFBSG device creates a simulated optical fiber backscattered signal of a virtual cable and couples this signal into the OTDR so that length accuracy, loss accuracy, and dynamic range of the OTDR can be determined. An electrooptical section, a signal generator section and a microprocessor section that is programmable to simulate a variety of cable anomalies, provide adaptability to accommodate a wide variety of OTDRs and, by reason of its sound engineering design, it is capable of being used under adverse conditions such as those encountered in the field.

REFERENCES:
patent: 4289398 (1981-09-01), Robichaud
patent: 4497575 (1985-02-01), Philipp
patent: 4685799 (1987-08-01), Brininstool
patent: 4708471 (1987-11-01), Beckmann et al.
patent: 4732469 (1988-03-01), Souma
patent: 4743753 (1988-05-01), Cheng et al.

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