Northern Telecom Limited

David John Moule

Terry Bricheno

Sureshchandra Mishrilal Ojha

Stephen Day

Sureshchandra Mishrilal Ohja

Colin Brian Rogers

Clifford Graham Cureton

The present invention is an improved method of pigtailing of high-density Wavelength Division Multiplex (WDM) components, achieved by etching silicon V-grooves for locating the fibres after completion of the PLC device fabrication processes. This avoids the need for etching or pre-patterning of the V-grooves on substrates before device fabrication, and hence avoids any of the waveguide to fibre alignment problems that have been found in the methods of the prior art.

Method of manufacturing planar lightwave circuits

A planar optical waveguide comprises at least two cladding layers on a substrate with at least one core layer disposed between the cladding layers. The overcladding layer of the two layers is doped in order to produce a thermal coefficient of expansion close to or equal to that of the substrate in order to reduce the polarisation sensitivity of the device.

Planar optical waveguide

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Old Harlow, United Kingdom

David John Moule