We present simultaneous fabrication of micro-deflector and optical waveguide using femtosecond two photon
polymerization technique. Parallelepiped-shaped waveguide was created which may serve as beam deflectors for layerto-
layer optical interconnection. The quality of the polymerized surface was characterized by atomic force microscope
(AFM) which shows the root-mean-square (RMS) roughness is no greater than 5nm. The propagation and reflection loss
of the fabricated waveguide at wavelength of 850nm are estimated to be <1dB/cm and <1.5dB per reflection,
respectively. Based on this result, the total layer-to-layer insertion loss was estimated to be less than 4dB/cm,
demonstrating the great potential for optical interconnections on printed circuit boards (PCBs).
In this paper, we show a whispering gallery mode coupler utilizing a side-tap structure. Here we choose a microsphere as
the resonator. We fabricate this device by standard photolithography. Therefore, it is a on-chip optical device. The
coupling efficiency can be as high as 26% by simulation. We fabricate the waveguide by photolithography to increase
the stability and mechanical strength. In the end, we also check the physical tolerance and wavelength selectivity.
Resonant cavities are key components in photonic circuits which provide feedback, wavelength selectivity and energy
storage. Microspheres, in particular, support ultrahigh-Q whispering gallery modes (WGMs) that may lead to large
delays and enhanced optical nonlinearity within several tens of microns length scale. Most of the demonstrated devices
to date utilize a tapered fiber to excite the WGMs, however this coupling architecture not only lacks of rigid stability but
inhibits dense integration to form more sophisticated planar lightwave circuits (PLCs). Here we report an alternative
approach based on evanescent coupling between the microsphere and a S-bend waveguide structure. This approach
provides better mechanical stability and is capable for on-chip integration.
This paper reports the fabrication of Bi2O3-based glass planar and channel waveguides using two techniques, respectively hot-dip spin-coating, and direct 244 nm UV-writing into the bulk glass. In the former, a 5 μm core glass film was achieved, which indicates a practical potential for realizing single mode operation channel guides. In the later, the laser written structures obtained showed a positive refractive index change, estimated at 4×10-4 at 633 nm, and a loss of less than 4 dB/cm.