We demonstrate cladding mode assisted supercontinuum generation in a solid core photonic crystal fiber.
Although the fiber is commonly considered as endlessly single mode, we show that coupling light into the
cladding excites much broader spectrum compared with the situation when only fundamental mode is excited.
Comparing experimental data with the results of the modal analysis and the simulations of the pulse propagation
in the fiber, we conclude that cladding mode has more favorable dispersion characteristics for the continuum
generation. We discuss possible usage of the cladding mode assisted supercontinuum in biosensor applications.
We demonstrate Digital Optical Switches (DOS) on InP based on carrier-injection and on the quantum-confined Stark effect (QCSE). The active waveguide core is composed of either a double-heterostructure of InGaAsP for carrier-injection or a InGaAs-InGaAsP for reverse bias operation. O-Ion implantation was employed to isolate the branches of the DOS instead of the usual isolation by etching employed elsewhere.
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