Optical monitoring and test access module

Details Optical monitoring and test access module Optical monitoring and test access module

1996-09-09

1998-08-11

Ngo, John

Optical waveguides

With optical coupler

Plural

385134, 385135, C02B 636

Patent

active

057939098

ABSTRACT:
The present invention is an optical monitoring and test access interconnection module especially adapted for use with a fiber optic distribution frame for a fiber optic communications system. The interconnection module provides a combination of monitoring and test access for two fiber lines, typically a transmit/receive pair, where wavelength division multiplexer (WDM) test access is provided to both the transmit and receive fibers. In one embodiment of the present invention, the interconnection module monitors only the receive fiber line where a power monitoring circuit receives a monitor level optical signal via an optical tap and converts the optical signal to an electrical output. Processing electronics and firmware within the module are operable to generate alarms and other control signals when changes in the power level of the received signal are detected. A test access path is provided on the module for use, for example, with an optical time domain reflectometer (OTDR). In one embodiment of the present invention, the interconnection module incorporates a unique physical design arrangement that separates the optical signal processing from the electronic processing into partitioned sub-modules. The optical and electronic sub-modules may advantageously be assembled (and dis-assembled) by means of guides that allow the module halves to slide together. A unique optical mating connector is provided in the sliding arrangement to join the optical module to an opto-electronic photodetector in the electronic module.

REFERENCES:
patent: 5069521 (1991-12-01), Hardwick
patent: 5204925 (1993-04-01), Bonanni et al.
patent: 5218465 (1993-06-01), Lebby et al.
patent: 5448675 (1995-09-01), Leone et al.
patent: 5461693 (1995-10-01), Pimpinella
patent: 5570217 (1996-10-01), Fleuren

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