Polarization selective electro-optic polymer waveguide devices by direct electron beam writing

Waveguide electro-optic modulator in fused silica fabricated by femtosecond laser direct writing and thermal poling.

An integrated electro-optic waveguide modulator is demonstrated in bulk fused silica. A Mach-Zehnder interferometer waveguide structure is fabricated by direct writing with a femtosecond laser followed by thermal poling. A 20 degrees electro-optic phase shift is achieved at an operating wavelength of 1.55 microm with an applied voltage of 400 V and an interaction length of 25.6 mm, which corres...

Integrated-Optic Polarization Controlling Devices Using Electro-Optic Polymers

Electro-Optic Devices with Nanometer Scale Structures Fabricated by Electron Beam

Decomposition of chromophore molecules under direct electron beam irradiation reduces the refractive index of chromophore containing polymers. The induced refractive index contrast between the exposed and unexposed regions is high enough for waveguide bends of small radius and thus micro-ring resonator devices. This electron beam bleaching of chromophore-containing polymers provides a fabricati...

Polymeric multi-channel bandpass filters in phase-shifted Bragg waveguide gratings by direct electron beam writing.

We apply direct electron beam writing to fabricate corrugated sidewall Bragg gratings in polymer waveguides and demonstrate multi-channel passband filters based on a phase-shifted design. Experimental results are compared with numerical fittings to analyze the impact of signal polarization and waveguide cladding material upon device performance.

Photodefinition of channel waveguide in electro-optic polymer

Polymers with optically active nonlinear chromophores have been shown to have a promising future in low cost and high speed electro–optic device applications. However, a main question of concern is the photochemical stability of the chromophores for long term application. The chromophore TCVDPA with a benzene bridge between a tricyanovinyl acceptor and an amino donor has been reported to have h...