Search Results - "Johlen, D."

Measurement of the birefringence of UV-written channel silica waveguides by magnetooptic polarization-mode coupling by Johlen, D., Renner, H., Brinkmeyer, E.

“…We report the measurement of the birefringence in integrated-optical waveguides using magnetooptical coupling between the two principal polarizations of the…”
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Fiber Fabry-Perot interferometer with mode-converting Bragg gratings by Johlen, D., Klose, P., Renner, H., Brinkmeyer, E.

“…Bragg gratings are genuine narrow band reflectors. However, for several applications narrow band transmission filters are of interest. It is demonstrated that…”
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UV-writing of two-mode sections into single-mode fibers for hosting mode-converting Bragg gratings by Johlen, D., Renner, H., Klose, P., Brinkmeyer, E.

“…A waveguide section intended to host mode-converting optical elements has to be two-moded, at least. However, waveguides of interest such as telecommunication…”
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Transfer-matrix method for non-Hermitian pseudo-Hamiltonians and the commensurate-incommensurate charge-density-wave transition by CHUNG, S. G, JOHLEN, D. R. A, KASTRUP, J

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UV-written directional couplers in silica on silicon by Johlen, D., Klose, P., Brinkmeyer, E.

“…Photosensitivity in Ge-doped silica is a well-known effect used for the fabrication of fiber Bragg gratings. Because the UV-induced index change of…”
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Fiber Bragg grating Fabry-Perot interferometer for a precise measurement of the UV-induced index change by Johlen, D., Renner, H., Ewald, A., Brinkmeyer, E.

“…A measurement technique based on using a Bragg-grating Fabry-Perot interferometer is presented to determine UV-induced index changes in silica fibers. This…”
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Narrow-band-mode converting Fabry-Perot output coupler for fiber lasers by Johlen, D., Klose, P., Renner, H., Brinkmeyer, E.

“…Summary form only given. Tilted Bragg gratings have been demonstrated to be efficient mode converters in two-mode fibers. A pair of tilted Bragg gratings in a…”
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UV-induced absorption, scattering and transition losses in UV side-written fibers by Johlen, D., Knappe, F., Renner, H., Brinkmeyer, E.

“…We demonstrate that UV-illumination of hydrogen-loaded photosensitive fiber leads to considerable loss. The three contributing loss mechanisms of absorption,…”
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