Ultrafast guided‐light beam deflection/switching and modulation using simulated electro‐optic prism structures in LiNbO3waveguides

1975 ◽  
Vol 27 (4) ◽  
pp. 248-250 ◽  
Author(s):  
C. S. Tsai ◽  
P. Saunier
Keyword(s):  
Light Beam ◽  
Beam Deflection ◽  
Electro Optic

scholarly journals Development of an Electro-Optic Scanner for Potential Endoscope Application

2009 ◽  
Vol 3 (2) ◽  
Author(s):  
W. Wang ◽  
S. Lee ◽  
A. Jen ◽  
P. Reinhall ◽  
D. Nuckley
Keyword(s):  
Light Beam ◽  
Optical Fibers ◽  
Imaging System ◽  
Biological Tissues ◽  
Index Of Refraction ◽  
Beam Deflection ◽  
Image Size ◽  
Remote Imaging ◽  
Horizontal Beam ◽  
Electro Optic

Technological advancements in endoscopy design are in current development due to the increased demand for minimally invasive medical procedures. One such advancement is reducing the overall size of the endoscope system while maintaining the resolution and field-of-view (FOV). Reduction of size results in less tissue damage and trauma during operation as well as faster recovery times for patients. Additionally, areas that are inaccessible by today's endoscope designs will be possible to examine. Current endoscopes use either a bundle of optical fibers (optical waveguides) and/or one or more cameras having an array of detectors to capture an image. Thus, the diameter of these devices employed for remote imaging cannot be reduced to smaller than the image size. Even if one ignores additional optical fibers used for illumination of a region of interest, the scope diameter is therefore limited by the individual pixel size of a camera or by the diameter of optical fibers used to acquire the image. Therefore, it is apparent to achieve scopes with less than 3 mm overall diameter using current technologies, resolution and/or FOV must be sacrificed by having fewer pixel elements. All commercially available scopes suffer from this fundamental tradeoff between high image quality and small size. More recently, our research has been working on developing a 2-D electro-optic scanner potentially be implemented for clinical endoscopic imaging application. The proposed optical device has several unique advantages. Electro-optical scanning offers a sensitive, facile, accurate, and superb quality method to capture images of physical and biological tissues. In addition, the minute physical size of the imaging system has a much needed advantage over conventional imaging systems. The proposed design is based on the fact that the propagation direction of a light beam can be changed when the index of refraction of an electro-optic medium is altered by the application of an external electric field. The basic design of the system consists of a thin film electro-optic polymer waveguide with built-in cascaded prisms structure for horizontal beam deflection and an electro-optic grating structure for vertical beam deflection. The cascaded prisms are combined with the electro-optic polymer to create a voltage-controlled horizontal beam deflection. A grating coupler, a structure that is commonly used as light coupling device for dielectric waveguide, is combined with the EO polymer to create the vertical controlled beam deflection. A collimated light beam coupled into the waveguide by a mechanical coupler via an optical fiber cascaded down these two deflection stages. When the beam exits, the emitted light beam is displaced along two orthogonal directions in a raster pattern. A photodetector array integrated in the same substrate captured the reflected intensity. The scanned imaged is then analyzed and reconstruct based on the received signal.

Integrated (Pb,La)(Zr,Ti)O3 Heterostructure Waveguide Devices Fabricated by Solid-Phase Epitaxy

1999 ◽  
Vol 597 ◽  
Author(s):  
K. Nashimoto ◽  
S. Nakamura ◽  
H. Moriyama ◽  
K. Haga ◽  
M. Watanabe ◽  
...  
Keyword(s):  
Low Voltage ◽  
Solid Phase ◽  
Wet Etching ◽  
Propagation Loss ◽  
Beam Deflection ◽  
Solid Phase Epitaxy ◽  
Te Mode ◽  
Tm Mode ◽  
Electro Optic ◽  
Channel Waveguides

AbstractHeterostructures of a Pb(Zr,Ti)O3 (PZT) waveguide/(Pb,La)(Zr,Ti)O3 (PLZT) system buffer layer were grown on a Nb-doped SrTiO3 (Nb:ST) substrate by solid-phase epitaxy. The propagation loss in the PLZT heterostructure waveguides was on the order of I dB/cm. An electro-optic beam deflection device with an ITO prism electrode on the surface of the PLZT heterostructure waveguide presented efficient deflection of the coupled laser beam by applying a voltage between the electrode and the substrate. A beam deflection greater than 10 mrad at 5 V and frequency response as fast as 13 MHz were observed. An apparent electro-optic coefficient as large as 39 pmJV was estimated from the deflection characteristics for the TE mode and TM mode suggesting the polarization independent nature of the PZT waveguide. For integrating the electrooptic PLZT heterostructure waveguides, channel waveguides were fabricated in the PZT waveguides using a simple wet-etching process. Based on a low-voltage drive structure, lowloss waveguide process, and fine patterning process, a fabricated digital matrix switch showed a – 10 dB cross-talk at a voltage as low as 7.5 V.

90$^{\circ}$ Light Beam Deflection Technology for Single-Mode Optical Interconnection Systems

2007 ◽  
Vol 19 (23) ◽  
pp. 1868-1870 ◽  
Author(s):  
Masahito Morimoto ◽  
Ryuichi Sugizaki ◽  
Katsuki Suematsu
Keyword(s):  
Light Beam ◽  
Single Mode ◽  
Beam Deflection ◽  
Optical Interconnection

Enhanced electro-optic beam deflection of relaxor ferroelectric KTN crystals by electric-field-induced high permittivity: publisher’s note

2019 ◽  
Vol 44 (24) ◽  
pp. 5904
Author(s):  
Chang-Jiang Chen ◽  
Ju-Hung Chao ◽  
Yun Goo Lee ◽  
Annan Shang ◽  
Ruijia Liu ◽  
...  
Keyword(s):  
Electric Field ◽  
Relaxor Ferroelectric ◽  
Beam Deflection ◽  
High Permittivity ◽  
Electro Optic

scholarly journals Tunable lateral shift and polarization beam splitting of the transmitted light beam through electro-optic crystals

2008 ◽  
Vol 104 (12) ◽  
pp. 123101 ◽  
Author(s):  
Xi Chen ◽  
Ming Shen ◽  
Zhen-Fu Zhang ◽  
Chun-Fang Li
Keyword(s):  
Light Beam ◽  
Lateral Shift ◽  
Transmitted Light ◽  
Beam Splitting ◽  
Electro Optic

Binary Light Beam Deflection in Single Crystal Barium Titanate

1971 ◽  
Vol 42 (5) ◽  
pp. 1950-1957
Author(s):  
Marvin D. Drake ◽  
Richard I. Joseph ◽  
C. Harvey Palmer
Keyword(s):  
Barium Titanate ◽  
Single Crystal ◽  
Light Beam ◽  
Beam Deflection
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