An electro‐optic tunable filter

1979 ◽  
Vol 34 (6) ◽  
pp. 391-393 ◽  
Author(s):  
D. A. Pinnow ◽  
R. L. Abrams ◽  
J. F. Lotspeich ◽  
D. M. Henderson ◽  
T. K. Plant ◽  
...  
Keyword(s):  
Tunable Filter ◽  
Electro Optic

A Microwave Tunable Bandpass Filter for Liquid Crystal Applications

Frequenz ◽  
2017 ◽  
Vol 71 (7-8) ◽  
Author(s):  
Weiping Cao ◽  
Di Jiang ◽  
Yupeng Liu ◽  
Yuanwang Yang ◽  
Baichuan Gan
Keyword(s):  
Liquid Crystal ◽  
Bandpass Filter ◽  
Tunable Filter ◽  
Dielectric Anisotropy ◽  
Band Pass Filter ◽  
Microwave Band ◽  
Pass Filter ◽  
Practical Applications ◽  
Electro Optic ◽  
Band Pass

AbstractIn this paper, a novel microwave continuously tunable band-pass filter, based on nematic liquid crystals (LCs), is proposed. It uses liquid crystal (LC) as the electro-optic material to mainly realize frequency shift at microwave band by changing the dielectric anisotropy, when applying the bias voltage. According to simulation results, it achieves 840 MHz offset. Comparing to the existing tunable filter, it has many advantages, such as continuously tunable, miniaturization, low processing costs, low tuning voltage, etc. Thus, it has shown great potentials in frequency domain and practical applications in modern communication.

Electro-optic tunable filter

1986 ◽  
Vol 22 (12) ◽  
pp. 622
Author(s):  
I.C. Chang
Keyword(s):  
Tunable Filter ◽  
Electro Optic

APPLICATION OF PHOTOREFRACTIVE FIBER AND WAVEGUIDE GRATINGS TO FAST SPEED NARROW BAND TUNABLE FILTERS

1999 ◽  
Vol 08 (01) ◽  
pp. 147-158 ◽  
Author(s):  
SHIZHUO YIN
Keyword(s):  
Narrow Band ◽  
Grating Period ◽  
Tunable Filters ◽  
Tunable Filter ◽  
Bragg Grating ◽  
Diffraction Effect ◽  
Preliminary Results ◽  
Fast Speed ◽  
Electro Optic ◽  
Waveguide Gratings

In this paper, the progress of the application of photorefractive fiber and waveguide crystal gratings to a narrow band, fast speed, tunable filter is presented. This novel filter is based on tunable Bragg grating. It uses the diffraction effect of Bragg grating to select the wavelength and the electro-optic effect of the grating to tune the effective grating period. Several approaches of fabricating this type of tunable Bragg grating based filter are discussed and some preliminary results are provided. It is shown that the tuning speed of this type of filter can be in the ns range and the bandwidth can be as narrow as 0.01 nm.

Electro-Optic Tunable Filter

1981 ◽  
Vol 20 (6) ◽  
Author(s):  
J. F. Lotspeich ◽  
R. R. Stephens ◽  
D. M. Henderson
Keyword(s):  
Tunable Filter ◽  
Electro Optic
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