Results 261 to 270 of about 176,138 (300)

Vectorial holography for independent intensity and polarization control

Optics Letters, 2023
Metasurface-based vectorial holography can reconstruct images with different polarization states. However, the number of polarization channels in the holographic image is relatively small in traditional methods. Here, we propose and demonstrate a metasurface vectorial hologram which carries infinite polarization channels.
Kai Pan, Xuanguang Wu, Liang Zhou, Bingyan Wei, Dong Li, Sheng Liu, Peng Li, Dexing Yang, Jianlin Zhao, Dandan Wen   +9 more
openaire   +2 more sources

Polarization-independent one-pump fiber-optical parametric amplifier

IEEE Photonics Technology Letters, 2002
One-pump fiber optical parametric amplifiers (OPAs) can be rendered polarization independent by using a polarization-diversity technique. We have experimentally demonstrated a fiber OPA with peak signal gain of 9 ± 0.2 dB when the signal polarization ...
Kenneth K Y Wong, K Uesaka, L G Kazovsky   +2 more
exaly   +2 more sources

Polarization-independent tunable reflector

2014 16th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM), 2014
In this paper, a novel tunable reflector with gain medium was designed, fabricated and measured. By incorporating active elements into two magnetic metamaterial SRRs, gain medium with positive loss, perfect losslessness and even negative loss can be tuned to switch the function of the active reflector among a perfect absorber, a perfect reflector and a
Tianwei Deng, Peng Khiang Tan, Ruifeng Huang   +2 more
openaire   +1 more source

A polarization-independent grating resonator

IEEE Journal of Quantum Electronics, 1997
A polarization-independent optical resonator based on a novel phase-shifted grating structure is proposed and analyzed. Its application as a polarization-independent optical wavelength filter with ultranarrow bandwidth and fine tunability is described.
null Wei-Ping Huang, null Qing Guo, null Chi Wu   +2 more
openaire   +1 more source

Polarization-independent switches on LiNbO3

Integrated Photonics Research, 1990
The basic structure of the noninterferometric switch (Fig. 1) is built in three sections: two passive polarization splitters and a mode-converter section.1If no voltage is applied to the mode converter electrodes, arbitrarily polarized light incident in one of the two input arms will exit one arm.
T. Pohlmann, A. Neyer, E. Voges
openaire   +1 more source

Broadband and polarization-independent waveguide-fiber coupling

Silicon Photonics XVIII, 2023
Waveguide-to-fiber coupling is one of the key challenges in silicon photonics. Many approaches have already been experimentally demonstrated, such as grating couplers, inverse tapers, sub-wavelength structures, lensed fibers, photonic wire bonds, small-core fibers and separate waveguide interposers.
Hassinen, Tomi, Kapulainen, Markku, Mäyrä, Aki, Vasama, Hannu, Heimala, Päivi, Aalto, Timo   +6 more
openaire   +2 more sources

Polarization independent isolator using spatial walkoff polarizers

IEEE Photonics Technology Letters, 1989
A novel type of polarization-independent optical isolator is described which utilizes the polarization walkoff provided by birefringent crystals. Isolation of 44 dB is measured at a wavelength of 1.3 mu m with single-mode fiber insertion loss of 1.5 dB.
K.W. Chang, W.W. Sorin
openaire   +1 more source

Polarization-Independent Black-Phosphorus Polarizer in Visible Regime

IEEE Photonics Technology Letters, 2017
We propose black-phosphorous (BP) TE- and TM-pass polarizers whose polarization state can be controlled using strong in-plane anisotropic property of BP. The tunable polarizer is configured as a BP-SiO2 metamaterial waveguide to take advantage of the change in refractive index of the whole structure. TE and TM-pass polarizers can be achieved with small
Feng Zhou, Jiefang Zhang
openaire   +1 more source

Birefringent polarization-independent beam splitter

Applied Optics, 1979
By adjusting both the thickness and angle of the incidence of a birefringent channeled spectrum plate, the extraordinary and ordinary reflectivities can be equalized, thereby providing a polarization-independent beam splitter.
openaire   +2 more sources

Polarization-independent beam splitter

Review of Scientific Instruments, 1983
We report a new type of beam splitter capable of producing a division of light in a polarization-independent manner. Most off-axis beam splitters have a pronounced polarization dependence. An experimental device with a splitting ratio of about 7 dB varied less than ±0.1 dB as a function of incident linear polarization.
openaire   +1 more source