Monitor for an optical fibre and multi-guide optical fibre circuits and methods of making them
First Claim
1. A monitor for monitoring at least one optical signal parameter in an optical fibre having an access region of reduced cladding sufficient to allow access to the evanescent field, the monitor comprising an optical element mountable adjacent to the access region of an optical fibre which optical element is capable of obtaining access to the evanescent field to enable use of the data therein to derive the at least one optical parameter.
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Abstract
The invention relates to a monitor for monitoring at least one optical signal parameter in an opticl fibre having an access region of reduced cladding sufficient to allow access to the evanescent field. The monitor includes an optical element mountable adjacent to the access region of an optical fibre which optical element is capable of obtaining access to the evanescent field to enable use of the data therein to derive the at least one optical signal parameter.
227 Citations
41 Claims
- 1. A monitor for monitoring at least one optical signal parameter in an optical fibre having an access region of reduced cladding sufficient to allow access to the evanescent field, the monitor comprising an optical element mountable adjacent to the access region of an optical fibre which optical element is capable of obtaining access to the evanescent field to enable use of the data therein to derive the at least one optical parameter.
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2. A monitor for monitoring the optical signal parameters in an optical fibre comprising a fibre having an access region of reduced cladding sufficient to allow access to the evanescent field of the optical fibre and an optical element mounted adjacent to the access region to obtain access to the evanescent field so as to enable use to be made of the data therein.
- 18. A channel monitor for a multi-channel optical fibre, comprising means for splitting an input fibre into a plurality of fibres each having mutually aligned access regions and each carrying a smaller number of channels than the multi-channel fibre, an array of photo detectors spanning the access regions of the said plurality of fibres, and means for combining the plurality of fibres into a single output fibre.
- 29. A multi-guide fibre circuit, comprising a plurality of optical fibres having access regions formed therein for access to the evanescent field of the fibres, these regions being transversely aligned to form a substrate surface and an electro- and/or optical circuit on the substrate surface with access to the evanescent field.
- 34. A method of making a multi-guide optical fibre circuit, comprising forming an access region in each of a plurality of optical fibres, mounting the optical fibres in parallel with the access regions transversely aligned to provide a substrate surface and forming an electro- and/or optical circuit thereon.
Specification