Itf Optical Technologies Inc.

Itf Technologies Optiques Inc.

Itf Laboratories Inc.

Itf Technologies Optiques Inc.- Itf Optical Technologies Inc.

Nawfel Azami

Alain Villeneuve

François Gonthier

Eric Villeneuve

François Seguin

Mathieu Faucher

Lilian Martineau

Marc Garneau

Francois Seguin

Francois Gonthier

An all-fiber, all-states of polarization linear design depolarizer is provided. It is made of two polarization combiners (PC,PC) with a 2&#xd7;2 directional coupler (DC) between them. The connections between the coupler (DC) and the two polarization combiners (PC,PC) have optical phase delays (L,L) and half wave polarization rotators (PR,PR,PR) to make proper adjustments.

All-fiber linear design depolarizer for all-states of polarization

An optical coupler is provided. It has a bundle of multimode fibers with a few-mode fiber in its centre. Such bundle is fused at one end which is the output end for the signal that is transmitted by the few-mode fiber. To make the coupler, this output end of the bundle is aligned and spliced with a large area core double clad fiber while preserving the modal content of the feed-through. A method for making such optical coupler is also provided. It includes the steps of bundling a central few-mode fiber with a plurality of multimode fibers and then fusing one end of such bundle and aligning it and splicing with a large core double clad fiber, while preserving fundamental mode transmission from one to the other.

Optical coupler comprising multimode fibers and method of making the same

An all-fiber broadband polarization combiner is disclosed based on a Mach-Zehnder (MZ) structure. The entry coupler to the MZ is a polarization pump combiner (PPC) and the exit coupler is a wavelength division multiplexer (WDM) coupler. The two couplers are interconnected with two standard SM fibers which form the arms of the central zone of the MZ. Two polarization maintaining (PM) fibers are spliced to the two input arms of the PPC and are oriented so that polarization X in one PM fiber is orthogonal to polarization Y in the other PM fiber. And the MZ is induced with a phase shift &#x394;&#x3c6; of &#x3c0; between the two arms of the central zone.

All-fiber broadband polarization combiner

An all-fiber depolarizer having a linear design includes a directional coupler associated with a polarization combiner. Linear light is pumped into the coupler where its intensity is split in two. Between the coupler and the combiner there is included an optical delay and the polarization of one intensity is made orthogonal to the other, as they enter the polarization combiner. The combiner combines the orthogonal polarizations and the light exits by an output in a depolarized state.

All-fiber linear design depolarizer

A method of adjusting thermal dependence of an optical fiber involves hydrogenating the fiber to render it photosensitive, and then exposing it to UV radiation for such time period as to achieve the desired adjustment in the thermal dependence. In an all-fiber Mach-Zehnder interferometer, the method involves using a photosensitive fiber as one of the arms of the interferometer and exposing this photosensitive fiber to UV radiation so as to adjust the thermal dependence of the interferometer. The resulting interferometer is also part of the invention.

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Montreal, Canada

Nawfel Azami