Direct Measurement of Polarization Dependency of Mode Conversion in a Long Period Grating

2019 ◽  
Author(s):  
Lars Grüner-Nielsen ◽  
Neethu Mariam Mathew ◽  
Karsten Rottwitt
Keyword(s):  
Direct Measurement ◽  
Mode Conversion ◽  
Long Period Grating ◽  
Long Period

Femtosecond pulse delivery using a chirped long-period grating of multi-mode fiber for mode conversion

2010 ◽  
Vol 57 (6) ◽  
pp. 485-491 ◽  
Author(s):  
J. Yao ◽  
L. Zhan ◽  
Y.X. Wang ◽  
H.G. Li ◽  
S.Y. Luo ◽  
...  
Keyword(s):  
Femtosecond Pulse ◽  
Mode Conversion ◽  
Long Period Grating ◽  
Long Period ◽  
Multi Mode

Nanoporous TiO2/Polyion Thin-Film-Coated Long-Period Grating Sensors for the Direct Measurement of Low-Molecular-Weight Analytes

Langmuir ◽  
2012 ◽  
Vol 28 (23) ◽  
pp. 8814-8821 ◽  
Author(s):  
Rui-Zhu Yang ◽  
Wen-Fei Dong ◽  
Xiang Meng ◽  
Xu-Lin Zhang ◽  
Yun-Lu Sun ◽  
...  
Keyword(s):  
Thin Film ◽  
Molecular Weight ◽  
Direct Measurement ◽  
Low Molecular Weight ◽  
Long Period Grating ◽  
Long Period

A Long Period Grating Sensor Based on Helical Capillary Optical Fiber

2021 ◽  
pp. 1-1
Author(s):  
Hongchang Deng ◽  
Rui Wang ◽  
Xiaowen Jiang ◽  
Chuanxin Teng ◽  
Ronghui Xu ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Long Period Grating ◽  
Long Period

scholarly journals Estimation of singly transiting K2 planet periods with Gaia parallaxes

2019 ◽  
Vol 489 (3) ◽  
pp. 3149-3161 ◽  
Author(s):  
Emily Sandford ◽  
Néstor Espinoza ◽  
Rafael Brahm ◽  
Andrés Jordán
Keyword(s):  
Direct Measurement ◽  
Free Parameter ◽  
Broad Band ◽  
Long Period ◽  
Period Distribution ◽  
Typical Period ◽  
Stellar Models ◽  
Host Stars ◽  
Stellar Density ◽  
As If

ABSTRACT When a planet is only observed to transit once, direct measurement of its period is impossible. It is possible, however, to constrain the periods of single transiters, and this is desirable as they are likely to represent the cold and far extremes of the planet population observed by any particular survey. Improving the accuracy with which the period of single transiters can be constrained is therefore critical to enhance the long-period planet yield of surveys. Here, we combine Gaia parallaxes with stellar models and broad-band photometry to estimate the stellar densities of K2 planet host stars, then use that stellar density information to model individual planet transits and infer the posterior period distribution. We show that the densities we infer are reliable by comparing with densities derived through asteroseismology, and apply our method to 27 validation planets of known (directly measured) period, treating each transit as if it were the only one, as well as to 12 true single transiters. When we treat eccentricity as a free parameter, we achieve a fractional period uncertainty over the true single transits of $94^{+87}_{-58}{{\ \rm per\ cent}}$, and when we fix e = 0, we achieve fractional period uncertainty $15^{+30}_{-6}{{\ \rm per\ cent}}$, a roughly threefold improvement over typical period uncertainties of previous studies.

scholarly journals Experimental demonstration of a long-period grating based on the sampling theorem

2006 ◽  
Vol 88 (21) ◽  
pp. 211103 ◽  
Author(s):  
Min-Suk Kwon ◽  
Young-Bo Cho ◽  
Sang-Yung Shin
Keyword(s):  
Sampling Theorem ◽  
Experimental Demonstration ◽  
Long Period Grating ◽  
Long Period
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