Results 191 to 200 of about 6,438 (244)

Optical waveguides structured with photoaligning polymers

Optics Letters, 2005
We present a novel fast fabrication method for making optical waveguides by using a photoaligning and a liquid-crystal polymer. A difference in the refractive indices in the core and cladding regions is achieved by use of polarized UV light to align the polymer chains differently. A refractive-index difference of Deltan = 0.07 was achieved.
Stump A, Gubler U, Bosshard C
openaire   +3 more sources

Efficient Coupling into Polymer Waveguides by Gratings

Applied Optics, 1997
Investigations of highly efficient grating couplers for polymer slab and strip waveguides fabricated by electron-beam lithography are reported. A maximum input efficiency of 67% is achieved. The electron-beam direct-writing technique allows one to replicate the original gratings into polymer substrates by embossing.
R, Waldhäusl, B, Schnabel, P, Dannberg, E B, Kley, A, Bräuer, W, Karthe   +5 more
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Grating coupling to polymer optical waveguides

SPIE Proceedings, 1994
We describe the production and optical characterization of planar dielectric waveguides of the organic polymers Poly-(alpha) -Methyl-Styrene and Poly-Phenyl-Acetylene. Single mode waveguides, at (lambda) equals 1.064 micrometers , were obtained by the use of the spin-coating technique.
MICHELOTTI, Francesco, M. MORELLI, F. CATALDO, G. PETROCCO, BERTOLOTTI, Mario   +4 more
openaire   +1 more source

Fabrication of polymer waveguides by a replication method

Applied Optics, 2006
We have developed a soft-lithography method to replicate polymer waveguides. In this method, the waveguides are produced by a two-step molding process where a master mold is first formed on a negative-tone photoresist and subsequently transferred to a polydimethylsiloxane (PDMS) mold; a PDMS silicone rubber mold is then used as a stamp to transfer the ...
Wei-Ching, Chuang, Chi-Ting, Ho, Wen-Chung, Chang   +2 more
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Ultra low loss polymer waveguides

OFC 2003 Optical Fiber Communications Conference, 2003., 2003
Single-mode perfluoropolymer waveguide structures exhibiting a polarization-independent ultra low loss of
A. Yeniay, R. Gao, K. Takayama, R. Gao, A.F. Garito   +4 more
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Polymer fiber waveguides

Soviet Journal of Quantum Electronics, 1982
A review is given of the optical, chemical, physical, and technological properties of polymer fiber waveguides. These waveguides are classified in accordance with their structure, properties of the materials used to make them, and fabrication methods. The main operating characteristics of the waveguides are given: the absorption and scattering in the ...
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Optical Waveguiding in Poled NLO Polymers

MRS Proceedings, 1991
ABSTRACTFor potential optoelectronic applications, new polymeric thin films containing nonlinear optical chromophores aligned by electric field poling for a χ(2) nonlinear optical response have been prepared and studied.
Swalen, J., Fleming, W., Jurich, M., Moerner, W., Smith, B., Herminghaus, S., Bjorklund, G.   +6 more
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Nd-Doped Polymer Waveguide Amplifiers

IEEE Journal of Quantum Electronics, 2010
Nd3+-complex-doped polymer channel waveguide amplifiers with various lengths and Nd3+ concentrations are fabricated by a simple procedure. Internal net gain at 840–950 nm and 1064 nm is experimentally and theoretically investigated under continuous-wave excitation at 800 nm.
Yang, Jing, Diemeer, Mart, Sengo, Gabrie͏̈l, Pollnau, Markus, Driessen, Alfred   +4 more
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Single-mode rib polymer waveguides and electro-optic polymer waveguide switches

Optics and Lasers in Engineering, 2002
Abstract Mode-matching and effective index methods are used to analyze single-mode operation of optical rib polymer waveguides. Their single-mode waveguiding conditions are determined. Single-mode rib waveguides fabricated from guest–host polyetherketone are presented. The estimated propagation loss of straight rib-waveguides is 0.7 dB/cm at 1.55 μm.
Wei Shi, Yujie J. Ding, Changshui Fang, Qiwei Pan, Qingtian Gu   +4 more
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Waveguide Raman spectroscopy of polymers and polymer laminates

Journal of Raman Spectroscopy, 1993
AbstractThe Raman waveguide spectra of a series of polymer laminates obtained using a simple optical waveguide coupling device are reported. The optical properties of these polymer films were obtained by measuring the waveguide coupling angles and the resulting electric field calculations were shown to predict (semiquantitatively) the observed spectra ...
Jonathan K. F. Tait, N. Michael Dixon, Neil Everall, Gerald Davies, Robert McIntyre, Jack Yarwood   +5 more
openaire   +1 more source