Electro-optic modulator with quasi-velocity matching

1997 ◽  
Author(s):  
Fengzhen Guo ◽  
Changtai Yu
Keyword(s):  
Electro Optic ◽  
Velocity Matching ◽  
Electro Optic Modulator

Velocity matching of III-V travelling-wave electro-optic modulator structures

1990 ◽  
Vol 26 (1) ◽  
pp. 32-33 ◽  
Author(s):  
M.R.T. Tan ◽  
I. Kim ◽  
J. Chang ◽  
S.Y. Wang
Keyword(s):  
Travelling Wave ◽  
Electro Optic ◽  
Velocity Matching ◽  
Electro Optic Modulator

Velocity matching of a GaAs electro-optic modulator

2003 ◽  
Vol 42 (36) ◽  
pp. 7179 ◽  
Author(s):  
Shyqyri Haxha ◽  
B. M. Azizur Rahman ◽  
Salah S. A. Obayya ◽  
Kenneth T. V. Grattan
Keyword(s):  
Electro Optic ◽  
Velocity Matching ◽  
Electro Optic Modulator

Electro-Optic Modulator for Compensation of Third-Order Intermodulation Distortion Using Frequency Chirp Modulation

2020 ◽  
Vol E103.C (11) ◽  
pp. 653-660
Author(s):  
Daichi FURUBAYASHI ◽  
Yuta KASHIWAGI ◽  
Takanori SATO ◽  
Tadashi KAWAI ◽  
Akira ENOKIHARA ◽  
...  
Keyword(s):  
Intermodulation Distortion ◽  
Frequency Chirp ◽  
Third Order ◽  
Chirp Modulation ◽  
Electro Optic ◽  
Electro Optic Modulator

scholarly journals A New Method to Verify the Measurement Speed and Accuracy of Frequency Modulated Interferometers

2021 ◽  
Vol 11 (13) ◽  
pp. 5787
Author(s):  
Toan-Thang Vu ◽  
Thanh-Tung Vu ◽  
Van-Doanh Tran ◽  
Thanh-Dong Nguyen ◽  
Ngoc-Tam Bui
Keyword(s):  
Phase Change ◽  
High Speed ◽  
Measurement Accuracy ◽  
Slow Motion ◽  
New Method ◽  
Virtual Displacement ◽  
Electro Optic ◽  
Lock In ◽  
Speed And Accuracy ◽  
Electro Optic Modulator

The measurement speed and measurement accuracy of a displacement measuring interferometer are key parameters. To verify these parameters, a fast and high-accuracy motion is required. However, the displacement induced by a mechanical actuator generates disadvantageous features, such as slow motion, hysteresis, distortion, and vibration. This paper proposes a new method for a nonmechanical high-speed motion using an electro-optic modulator (EOM). The method is based on the principle that all displacement measuring interferometers measure the phase change to calculate the displacement. This means that the EOM can be used to accurately generate phase change rather than a mechanical actuator. The proposed method is then validated by placing the EOM into an arm of a frequency modulation interferometer. By using two lock-in amplifiers, the phase change in an EOM and, hence, the corresponding virtual displacement could be measured by the interferometer. The measurement showed that the system could achieve a displacement at 20 kHz, a speed of 6.08 mm/s, and a displacement noise level < 100 pm//√Hz above 2 kHz. The proposed virtual displacement can be applied to determine both the measurement speed and accuracy of displacement measuring interferometers, such as homodyne interferometers, heterodyne interferometers, and frequency modulated interferometers.

Optical two-tone generation and SSB modulation using electro-optic modulator with suppressing redundant spectrum components

2011 ◽  
Vol 3 (3) ◽  
pp. 295-300 ◽  
Author(s):  
Akira Enokihara ◽  
Tadashi Kawai ◽  
Tetsuya Kawanishi
Keyword(s):  
Input Power ◽  
Intensity Level ◽  
Optical Signals ◽  
Single Sideband ◽  
Electro Optic ◽  
Rf Signals ◽  
Frequency Components ◽  
Optical Single Sideband ◽  
Tone Generation ◽  
Electro Optic Modulator

Doubled frequency optical two-tone generation and optical single sideband (SSB) modulation by the dual-electrode-type electro-optic (EO) modulator with a single Mach–Zehnder (MZ) interferometer were considered. We theoretically showed that redundant spectrum components in the modulated optical signals, which are caused by the imbalance of light splitting ratio between the two arms of the interferometer, are significantly suppressed by controlling the input power ratio of RF modulation signals applied to each electrode. This effect was confirmed by the experiment, where an optical two-tone with the redundant components 49.8 dB lower than the primary two-tone components in intensity level was obtained. This method is also valid for suppression of undesired frequency components of RF signals that are generated at a photo detector from the optical two-tone waves propagated through a dispersive optical fiber.

Single-Source Duplex High-Speed FSO Communications Using Electro-Optic Modulator-Based MRR

2018 ◽  
Author(s):  
Xianglian Feng ◽  
Hexin Jiang ◽  
Zhihang Wu ◽  
Tianshu Wang ◽  
Hongwei He ◽  
...  
Keyword(s):  
High Speed ◽  
Single Source ◽  
Electro Optic ◽  
Electro Optic Modulator

Fiber-coupled polymer waveguide for electro-optic modulator

2000 ◽  
Author(s):  
Xiao Hong Yang ◽  
Yun Du ◽  
Aimin Yin ◽  
Zhiwen Shi ◽  
Rong Han Wu ◽  
...  
Keyword(s):  
Polymer Waveguide ◽  
Electro Optic ◽  
Electro Optic Modulator

An LD-pumped Q-switched Nd:YAG laser usingLa3Ga5SiO14for the electro-optic modulator and optical activity compensation

Laser Physics ◽  
2014 ◽  
Vol 24 (4) ◽  
pp. 045802 ◽  
Author(s):  
H Zheng ◽  
J H Huang ◽  
X Zhao ◽  
J Y Wang ◽  
F Shi ◽  
...  
Keyword(s):  
Optical Activity ◽  
Nd:Yag Laser ◽  
Electro Optic ◽  
Electro Optic Modulator
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