Continuous-wave terahertz detectors using electro-optic polymer waveguides and gold antenna arrays (Conference Presentation)

2020 ◽  
Author(s):  
Takahiro Kaji ◽  
Isao Morohashi ◽  
Yukihiro Tominari ◽  
Yoh Ogawa ◽  
Norihiko Sekine ◽  
...  
Keyword(s):  
Antenna Arrays ◽  
Continuous Wave ◽  
Polymer Waveguides ◽  
Terahertz Detectors ◽  
Electro Optic

scholarly journals W-band optical modulators using electro-optic polymer waveguides and patch antenna arrays

2021 ◽  
Author(s):  
Takahiro Kaji ◽  
Isao Morohashi ◽  
Yukihiro Tominari ◽  
Norihiko SEKINE ◽  
Toshiki Yamada ◽  
...  
Keyword(s):  
Antenna Arrays ◽  
Patch Antenna ◽  
Polymer Waveguides ◽  
Optical Modulators ◽  
W Band ◽  
Electro Optic

Photo-Stability Measurement of Electro-Optic Polymer Waveguides With High Intensity at 1550-nm Wavelength

2009 ◽  
Vol 27 (8) ◽  
pp. 1045-1050 ◽  
Author(s):  
S. Takahashi ◽  
B. Bhola ◽  
A. Yick ◽  
W.H. Steier ◽  
Jingdong Luo ◽  
...  
Keyword(s):  
High Intensity ◽  
Polymer Waveguides ◽  
Electro Optic ◽  
Stability Measurement ◽  
Photo Stability

scholarly journals Ultrafast electro-optic light with subcycle control

Science ◽  
2018 ◽  
Vol 361 (6409) ◽  
pp. 1358-1363 ◽  
Author(s):  
David R. Carlson ◽  
Daniel D. Hickstein ◽  
Wei Zhang ◽  
Andrew J. Metcalf ◽  
Franklyn Quinlan ◽  
...  
Keyword(s):  
High Speed ◽  
Near Infrared ◽  
Continuous Wave ◽  
Mode Locking ◽  
Light Sources ◽  
Electro Optic ◽  
High Pulse ◽  
Optical Cycle ◽  
Rapid Transients ◽  
And Control

Light sources that are ultrafast and ultrastable enable applications like timing with subfemtosecond precision and control of quantum and classical systems. Mode-locked lasers have often given access to this regime, by using their high pulse energies. We demonstrate an adaptable method for ultrastable control of low-energy femtosecond pulses based on common electro-optic modulation of a continuous-wave laser light source. We show that we can obtain 100-picojoule pulse trains at rates up to 30 gigahertz and demonstrate sub–optical cycle timing precision and useful output spectra spanning the near infrared. Our source enters the few-cycle ultrafast regime without mode locking, and its high speed provides access to nonlinear measurements and rapid transients.

W-band optical modulators using organic EO polymer waveguides and patch antenna arrays

2021 ◽  
Author(s):  
Takahiro Kaji ◽  
Isao Morohashi ◽  
Yukihiro Tominari ◽  
Yoh Ogawa ◽  
Norihiko Sekine ◽  
...  
Keyword(s):  
Antenna Arrays ◽  
Patch Antenna ◽  
Polymer Waveguides ◽  
Optical Modulators ◽  
W Band

scholarly journals Design of an antenna array for a LFM-CW synthetic aperture radar prototype

DYNA ◽  
2020 ◽  
Vol 87 (212) ◽  
pp. 96-101
Author(s):  
Alfonso José Zozaya ◽  
Paulino Jesús Del Pino Pettinare
Keyword(s):  
Synthetic Aperture Radar ◽  
Antenna Arrays ◽  
Patch Antenna ◽  
Continuous Wave ◽  
Horizontal Resolution ◽  
Synthetic Aperture ◽  
Empirical Equations ◽  
Full Wave ◽  
Theoretical Design ◽  
Aperture Radar

This paper deals with the design of two identical 1 × 4 patch antenna arrays for a linear frequency modulated (LFM) continuous wave (CW) synthetic aperture radar (SAR) prototype. The theoretical design is carried out by using the empirical equations available in the literature, while the design optimization is performed by numerical methods using two commercial full wave simulators. Once the antennas are built they are experimentally characterized and incorporated into a radar prototype implemented at the Ecuadorian Space Institute. The radar is tested in a probing polygon and the horizontal resolution is estimated. A measured azimuthal resolution value very close to the theoretical one is achieved

Structure optimization of electro-optic polymer waveguides for low half-wave voltage modulators

2010 ◽  
Author(s):  
Hind Mahé ◽  
Dominique Bosc ◽  
Nicolas Gayet ◽  
Fabrice Odobel ◽  
Pierre-Antoinne Bonnardel ◽  
...  
Keyword(s):  
Structure Optimization ◽  
Polymer Waveguides ◽  
Half Wave Voltage ◽  
Half Wave ◽  
Electro Optic
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