Itf Optical Technologies Inc.

Itf Technologies Optiques Inc.

Other

Itf Technologies Optiques Inc.- Itf Optical Technologies Inc.

Alain Villeneuve

Nawfel Azami

François Gonthier

Nicolas Godbout

Eric Villeneuve

Fran&ccedil;ois Gonthier

François Seguin

Mathieu Faucher

Lilian Martineau

Marc Garneau

Bruno Y Dion

Stéphane Caplette

Sylvain Cloutier

Charles Massicotte

Francois Seguin

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

This invention provides a method of obtaining accurate measurements of polarization dependent loss and insertion loss during the tests aiming at measuring the polarization properties of optical components. This is achieved by taking into account every polarization disturbance in the line between generation of known states of polarization and the device under test. The method involves computing within a desired range of wavelengths either the transfer matrix of each polarization perturbing element or of all polarization perturbing elements as a whole, and compensating for errors introduced by these polarization perturbing elements.

Method for measuring polarization dependent loss and insertion loss

The invention provides an all-fiber Mach-Zehnder interferometer in which the composition of one of the arms, which connect the couplers, or of a segment of such arm, is doped with dopants, such as GeO, PO, BOand F. The doping is adjusted to obtain a desired thermal dependence of the interferometer within a given temperature range. The segments can further be tapered with an adiabatic taper.

Passive thermal compensation of all-fiber Mach-Zehnder interferometer

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

An all-fiber optical depolarizer is provided in which polarized light is controllably injected into a polarization beam splitter at a 45&deg; angle. The beam splitter is combined with a loop made of standard non-birefringent fiber through which one of the polarizations split by the beam splitter circulates. The loop has a length greater than the coherence length of the light source. The interaction of the beam splitter and the loop produces incoherent depolarized light at the output transmission port of the beam splitter.

All-fiber depolarizer

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Montreal, Canada

Alain Villeneuve