A method for producing a waveguide for an nonlinear optical device is disclosed. The organic nonlinear optical material 1 is composed of a polymer having the second order nonlinear optical dye moieties substituted for the side chains of the polymer, each end of the optical dye moieties being grafted to the polymer. The optical material 1 is rolled and drawn by rolling rolls 2a, 2b and drawing rolls 4a, 4b, whereby a polymer film 3 is continuously formed, in which the optical dye moieties are oriented in a predetermined direction. Then the resultant polymer films are laminated to be a polymer laminate in which the orientations of the dye moieties are alternately inverted. The polymer laminate is cut in a predetermined direction with a predetermined thickness into a waveguide having a periodic domain structure with a predetermined submicron period or odd number times thereof.

Optical device and method of producing the device

PROBLEM TO BE SOLVED: To provide a modular, compact and widely wavelength tunable laser system of efficiently generating high-peak ultrashort pulses.SOLUTION: System compactness is ensured by employing efficient fiber amplifiers, directly or indirectly pumped by diode lasers. Peak power handling capability of the fiber amplifiers is expanded by using optimized pulse shapes, as well as dispersively broadened pulses. Dispersive broadening is introduced by dispersive pulse stretching in the presence of self-phase modulation and gain, resulting in formation of high-power parabolic pulses. After amplification, the dispersively stretched pulses are re-compressed nearly to their bandwidth limit by implementing another set of dispersive delay lines. To ensure a wide wavelength tunability of the whole system, Raman-shifting of the compact light sources of ultrashort pulses is implemented in conjunction with frequency conversion in nonlinear optical crystals. Further, positive dispersion optical amplifiers and Raman amplifier fibers are utilized.

Modular, high-energy, widely wavelength tunable and ultrafast fiber light source

An organic non-linear optical material (1), having polymer side chains terminally substituted with secondary non-linear optical dye molecules, is passed through a pair of press rollers (2a and 2a) and a pair of stretch rollers (4a and 4b) In this way, a polymer film (3) having oriented dye molecules is continuously produced The polymer films (3) so produced are then laminated in such a manner that the directions of orientation of the dye molecules in adjacent films become opposite to prepare a thin film laminate The resulting thin film laminate is cut in a predetermined direction into a predetermined thickness to produce a thin film waveguide for an optical device having a periodic domain structure with a specific submicron period or its odd multiple

Optical device and method of production thereof

A plastic optical fiber which comprises a core part comprising a polymer material and, doped therein, an optoactive medium, wherein the polymer material is a copolymer of a first monomer material having no hydroxyl groups and a second monomer material having a hydroxyl group, and the proportion of the amount of the second monomer material to that of the first monomer material is from 5 wt % to 15 wt %. The plastic optical fiber has improved durability.

Plastic optical fiber and plastic optical fiber laser device, and method for manufacture thereof

The invention comprises a tube preparation step of preparing a resin tube constituted from a light-transmitting resin material and into which a solution containing a fine substance can be impregnated into the tube wall, a solution preparation step of preparing a solution containing as an oscillation material a fine fluorescent substance which emits fluorescent light or a fine scattering substance for scattering light, and an impregnation step of immersing the resin tube into the solution to impregnate the oscillation material into the tube wall of the resin tube.

Method for producing tubular laser light source, tubular laser light source, and detector using same tubular laser light source

PURPOSE:To enable laser oscillation with high efficiency in a continuous wavelength from visible to near IR light a continuous wavelength region from visible to near IR light by incorporating a dye into the core of a plastic optical fiber formed by coating a plastic having excellent light perriousness with a plastic clad having the refractive index lower than the refractive index of the core. CONSTITUTION:The plastic core 11 consisting of a material having excellent light perriousness, for example, polymethyl methacrylate (PMMA) is added with the dye for oscillating a laser at an arbitrary wavelength and the diameter thereof is, for example, 3.5mum. The plastic clad 12 formed to coat the core 11 is of the material having the refractive index smaller than the refractive index (1.496) of PMMA which is the material of the cores 1, for example, a PMMA-PFMA (1%) copolymer obtd. by copolymerizing a small amt. of polyfluoroalkyl methacrylate (PMFA) with PMMA and has the refractive index (1.493) slightly smaller than the refractive index of PMMA. The laser oscillation with high efficiency in the continuous wavelength region from visible to near IR light is thereby enabled.

Hiroaki Hanabusa

Papers

Plastic optical fiber and its production