Zobrazeno 1 - 10
of 27
pro vyhledávání: '"Yongzhang Leng"'
Publikováno v:
Applied Optics. 56:6977
We present a method for synthesizing complex fiber Bragg gratings using femtosecond UV laser pulses and image projection from a small phase mask. Fiber gratings with arbitrary spectral reflectivity can be achieved by stitching short grating segments
Autor:
Yongzhang Leng, Julius Goldhar, Victor Yun, John T. Fourkas, P.-T. Ho, Dong Hun Park, Warren N. Herman, Sijia Qin, P. Cho
Publikováno v:
CLEO: 2013.
MAP was used to fabricate polymer DRRs as its high resolution allows precise control on the coupling/transmission coefficients. Pedestal acrylic DRRs with 33nm FSR and −15dB isolation were fabricated and showed qualitative agreement with simulation
Publikováno v:
CLEO: 2013.
Improvement of resolution beyond the Rayleigh limit is obtained by monitoring non-resonant four wave mixing generated by the target in a confocal scanning microscope configuration.
Publikováno v:
Physical Review E. 52:4328-4337
Plasmas with densities \ensuremath{\lesssim}${10}^{22}$ ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}3}$ and electron temperatures ${\mathit{T}}_{\mathit{e}}$\ensuremath{\lesssim}200 eV were produced near solid graphite targets that were laser irradiated a
Autor:
Yongzhang Leng, George Kumi, John T. Fourkas, Victor Yun, Sijia Qin, Dong Hun Park, Warren N. Herman, Julius Goldhar
Publikováno v:
Conference on Lasers and Electro-Optics 2012.
Micro-ring resonators with good performance were fabricated using multi-photon absorption polymerization (MAP) on PDMS and directly pressed against SPF producing variable resonances in the optical output spectrum depending on positioning and pressure
Publikováno v:
Conference on Lasers and Electro-Optics 2012.
Resolution of an optical system for grating detection was improved by a factor of two beyond the Abbe diffraction limit using nonlinear optics. Use of non-classical illumination did not provide any improvement.
Publikováno v:
SPIE Proceedings.
In this paper, we report on progress in the fabrication of a high speed optical phase modulator based on a nonlinear electro-optic (EO) polymer with an in-plane slotline radio frequency (RF) electrode structure. Compared to microstrip, a slotline RF
Publikováno v:
Organic Thin Films for Photonic Applications ISBN: 9780841225633
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2734e184e1f2bfb98c1b139601762d27
https://doi.org/10.1021/bk-2010-1039.ch010
https://doi.org/10.1021/bk-2010-1039.ch010
Autor:
Yongzhang Leng, R.J. Kearney
Publikováno v:
Journal of Quantitative Spectroscopy and Radiative Transfer. 46:183-193
The distribution of excited-state titanium atoms in an argon plasma at atmospheric pressure has been studied by spectroscopic measurements. The upper levels of the argon atoms were found to be in equilibrium with the continuum; electron collisions ar
Publikováno v:
Optics express. 16(26)
Phase-sensitive amplification of picosecond optical pulses was demonstrated using an SOA as the nonlinear medium inside a Sagnac interferometer. Ratios of maximum to minimum gain of more than 3:1 were experimentally measured. Numerical simulations us