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This letter presents a simple technique that improves the symmetry of tapered fibers fabricated with a continuous-wave CO2 laser. The uniform heat distribution inside an optical fiber is achieved by using a nonscanning dual-spot laser beam which applies heat on two sides of the optical fiber simultaneously. In so doing, highly symmetric tapers are obtained with an ellipticity close to unity. These tapers can be used as low-loss and polarization-dependent loss optical fiber filters or other optical devices such as symmetric fibers lenses

This paper presents recent scheme based of direct dual wavelength laser writing of lightwave circuits developed in our laboratories. The system allows the fabrication of features of the order of ~1 micron by using a short wavelength laser to ablate a region preheated by a second laser.

A reflectance measurement technique was used to determine the refractive index distribution of optical waveguides fabricated by a CW CO 2 direct writing technique. The uniformity of refractive index has been verified along the waveguides structure and used as input for accurate beam propagation method (BPM) calculations of waveguide devices.

This paper presents recent research undertaken in our laboratory in the field of direct laser writing of microfluidics circuits. Our novel technology allows the rapid fabrication of complex fluidic circuits. The fabricated channel have smooth walls and surfaces enabling the encapsulation of the circuits.

This invited talk presents the most recent work undertaken in our laboratory in the fields of direct laser writing of planar optical integrated circuits, laser written micro fluidics circuits, laser machining of v-grooves and laser machining in diffraction gratings.