An S-band high gain relativistic klystron amplifier with high phase stability

2014 ◽  
Vol 21 (11) ◽  
pp. 113107 ◽  
Author(s):  
Y. Wu ◽  
Z. H. Li ◽  
H. Q. Xie ◽  
Z. Xu ◽  
Q. S. Ma
Keyword(s):  
Phase Stability ◽  
High Gain ◽  
Relativistic Klystron ◽  
High Phase

scholarly journals Phase stable swept-source optical coherence tomography with active mode-locking laser for contrast enhancements of retinal angiography

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Kwan Seob Park ◽  
Eunwoo Park ◽  
Hwidon Lee ◽  
Hyun-Ji Lee ◽  
Sang-Won Lee ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Phase Stability ◽  
Averaging Method ◽  
Mode Locking ◽  
Optical Coherence ◽  
Swept Source ◽  
Active Mode ◽  
Coherent Averaging ◽  
Noise Ratio ◽  
High Phase

AbstractSwept-source optical coherence tomography (SS-OCT) is an attractive high-speed imaging technique for retinal angiography. However, conventional swept lasers vary the cavity length of the laser mechanically to tune the output wavelength. This causes sweep-timing jitter and hence low phase stability in OCT angiography. Here, we improve an earlier phase-stabilized, akinetic, SS-OCT angiography (OCTA) method by introducing coherent averaging. We develop an active mode-locking (AML) laser as a high phase-stable akinetic swept source for the OCTA system. The phase stability of the improved system was analyzed, and the effects of coherent averaging were validated using a retina phantom. The effectiveness of the coherent averaging method was further confirmed by comparing coherently and conventionally averaged en face images of human retinal vasculature for their contrast-to-noise ratio, signal-to-noise ratio, and vasculature connectivity. The contrast-to-noise ratio was approximately 1.3 times larger when applying the coherent averaging method in the human retinal experiment. Our coherent averaging method with the high phase-stability AML laser source for OCTA provides a valuable tool for studying healthy and diseased retinas.

Investigation of an ${X}$ -Band Long Pulse High-Power High-Gain Coaxial Multibeam Relativistic Klystron Amplifier

2019 ◽  
Vol 66 (1) ◽  
pp. 722-728 ◽  
Author(s):  
Zhenbang Liu ◽  
Hua Huang ◽  
Xiao Jin ◽  
Shifeng Li ◽  
Tengfang Wang ◽  
...  
Keyword(s):  
High Power ◽  
High Gain ◽  
Long Pulse ◽  
Relativistic Klystron

Analysis and suppression of self-oscillation in high gain relativistic klystron amplifier

2014 ◽  
Vol 26 (3) ◽  
pp. 33001
Author(s):  
吴洋 Wu Yang ◽  
谢鸿全 Xie Hongquan ◽  
李正红 Li Zhenghong ◽  
张运俭 Zhang Yunjian ◽  
马乔生 Ma Qiaosheng ◽  
...  
Keyword(s):  
High Gain ◽  
Relativistic Klystron

scholarly journals Coherence‐Tailored Multiwavelength High‐Speed Quantitative Phase Imaging with a High Phase Stability via a Frequency Comb

2020 ◽  
pp. 2000088
Author(s):  
Jeeranan Boonruangkan ◽  
Hamid Farrokhi ◽  
Thazhe Madam Rohith ◽  
Hui Ting Toh ◽  
Abhinay Mishra ◽  
...  
Keyword(s):  
Phase Stability ◽  
High Speed ◽  
Frequency Comb ◽  
Phase Imaging ◽  
Quantitative Phase Imaging ◽  
Quantitative Phase ◽  
High Phase

Mode control in a high gain relativistic klystron amplifier with 3 GW output power

2014 ◽  
Vol 38 (1) ◽  
pp. 017001 ◽  
Author(s):  
Yang Wu ◽  
Hong-Quan Xie ◽  
Zhou Xu
Keyword(s):  
Output Power ◽  
High Gain ◽  
Mode Control ◽  
Relativistic Klystron

scholarly journals A high phase stability transmitter clock domain design

2019 ◽  
Vol 1325 ◽  
pp. 012059
Author(s):  
Wenliang Zhao ◽  
Shengming Liang ◽  
Zhiyong Wang ◽  
Kang Wang
Keyword(s):  
Phase Stability ◽  
High Phase

scholarly journals Solar Cells: High Phase Stability in CsPbI 3 Enabled by Pb–I Octahedra Anchors for Efficient Inorganic Perovskite Photovoltaics (Adv. Mater. 24/2020)

2020 ◽  
Vol 32 (24) ◽  
pp. 2070185 ◽  
Author(s):  
Yong Wang ◽  
Gaoyuan Chen ◽  
Dan Ouyang ◽  
Xinjun He ◽  
Can Li ◽  
...  
Keyword(s):  
Solar Cells ◽  
Phase Stability ◽  
Inorganic Perovskite ◽  
High Phase

A 22 GHz receiver with high phase stability for radioastron space-VLBI-mission

1994 ◽  
Vol 5 (3-4) ◽  
pp. 389-404
Author(s):  
Petri Piironen ◽  
Juha Mallat ◽  
Antti Räisänen ◽  
Petri Jukkala
Keyword(s):  
Phase Stability ◽  
High Phase

scholarly journals A Novel Bulk-Optics Scheme for Quantum Walk with High Phase Stability

2019 ◽  
Vol 4 (1) ◽  
pp. 14 ◽  
Author(s):  
Andrea Geraldi ◽  
Luís Bonavena ◽  
Carlo Liorni ◽  
Paolo Mataloni ◽  
Álvaro Cuevas
Keyword(s):  
Phase Stability ◽  
Closed Loop ◽  
Lattice Structure ◽  
Quantum Walk ◽  
Quantum Walks ◽  
Phase Component ◽  
Dimensional Lattice ◽  
One Dimensional ◽  
Experimental Implementation ◽  
High Phase

A novel bulk optics scheme for quantum walks is presented. It consists of a one-dimensional lattice built on two concatenated displaced Sagnac interferometers that make it possible to reproduce all the possible trajectories of an optical quantum walk. Because of the closed loop configuration, the interferometric structure is intrinsically stable in phase. Moreover, the lattice structure is highly configurable, as any phase component perceived by the walker is accessible, and finally, all output modes can be measured at any step of the quantum walk evolution. We report here on the experimental implementation of ordered and disordered quantum walks.

Sign in / Sign up

Export Citation Format

Share Document