High-speed pulse generation using a sinusoidally driven Ti:LiNbO3 directional coupler travelling-wave optical modulator

1984 ◽  
Vol 20 (9) ◽  
pp. 384 ◽  
Author(s):  
S.K. Korotky ◽  
R.C. Alferness ◽  
L.L. Buhl ◽  
C.H. Joyner ◽  
E.A.J. Marcatili
Keyword(s):  
High Speed ◽  
Directional Coupler ◽  
Travelling Wave ◽  
Pulse Generation ◽  
Optical Modulator

High Speed YBaCuO/LiNbO3 Travelling-Wave Optical Modulator

1993 ◽  
pp. 1179-1182
Author(s):  
Shoichi Hashiguchi ◽  
Kyoichi Shibuya ◽  
Takeshi Kobayashi
Keyword(s):  
High Speed ◽  
Travelling Wave ◽  
Optical Modulator

High-speed low-loss low-drive-power travelling-wave optical modulator for λ = 1.32 μm

1984 ◽  
Vol 20 (8) ◽  
pp. 354 ◽  
Author(s):  
R.C. Alferness ◽  
S.K. Korotky ◽  
L.L. Buhl ◽  
M.D. Divino
Keyword(s):  
High Speed ◽  
Travelling Wave ◽  
Optical Modulator ◽  
Low Loss ◽  
Drive Power

IVB-8 high speed pulse generation using a sinusoidally driven Ti:LiNbO3directional coupler traveling-wave optical modulator

1983 ◽  
Vol 30 (11) ◽  
pp. 1596-1597
Author(s):  
S.K. Korotky ◽  
R.C. Alferness ◽  
L.L. Buhl ◽  
C.H. Joyner ◽  
E.A.J. Marcatilli
Keyword(s):  
Traveling Wave ◽  
High Speed ◽  
Pulse Generation ◽  
Optical Modulator

High speed and highly efficient Si optical modulator with strained SiGe layer

2015 ◽  
Author(s):  
Junichi Fujikata ◽  
Masataka Noguchi ◽  
Younghyun Kim ◽  
Shigeki Takahashi ◽  
Takahiro Nakamura ◽  
...  
Keyword(s):  
High Speed ◽  
Sige Layer ◽  
Optical Modulator ◽  
Highly Efficient ◽  
Strained Sige

High-Speed Δβ-Reversal Directional Coupler Modulator with Low Insertion Loss for 1.3 μm in LiNbO3

1984 ◽  
Vol 5 (1) ◽  
Author(s):  
F. Auracher ◽  
D. Schicketanz ◽  
K.-H. Zeitler
Keyword(s):  
Insertion Loss ◽  
High Speed ◽  
Directional Coupler ◽  
Low Insertion Loss ◽  
Directional Coupler Modulator

SummaryWe report on a very fast (≥ 6 Gbit/s) Δβ-reversal directional-coupler modulator with low insertion loss (2 dB) for 1.3 μm wavelength operation. The design of the modulator permits easy and reproducible fabrication.

scholarly journals The human sperm beats anisotropically and asymmetrically in 3D

2019 ◽  
Author(s):  
Hermes Gadêlha ◽  
Paul Hernández-Herrera ◽  
Fernando Montoya ◽  
Alberto Darszon ◽  
Gabriel Corkidi
Keyword(s):  
Ion Channels ◽  
Mathematical Analysis ◽  
Molecular Motors ◽  
High Speed ◽  
3D Imaging ◽  
Human Sperm ◽  
Travelling Wave ◽  
Fundamental Question ◽  
Sperm Flagellum ◽  
Straight Line

The canonical beating of the human sperm flagellum is postulated to be symmetric. This is despite the reported asymmetries inherent to the flagellar axonemal structure, from distribution and activation of molecular motors to, even, the localisation of regulatory ion channels. This raises a fundamental question: how symmetric beating is possible within such intrinsically asymmetric flagellar complex? Here, we employ high-speed 3D imaging with mathematical analysis capable of resolving the flagellar movement in 4D (3D+time). This reveals that the human sperm beating is both anisotropic and asymmetric, and composed by a superposition of two transversal waves: an asymmetric travelling wave and a symmetric standing wave. This novel anisotropic travelling-pulsation mechanism induces sperm rolling self-organisation and causes a flagellar kinematic illusion, so that the beat appears to be symmetric if observed with 2D microscopy. The 3D beating anisotropy thus regularises the intrinsic flagellar asymmetry to achieve symmetric side-to-side movement and straight-line swimming.

Sign in / Sign up

Export Citation Format

Share Document