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Suwat Thaniyavarn

from Bellevue, WA
Age ~67
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Also known as:
Suwat N
Phone and address:
2333 157Th Pl SE, Bellevue, WA 98008
(425) 747-6396
Connected to:
Sailaja Thanjavuru, 56Faith M Thanji, 35Rajanbabu Thanji, 51Al Thankachan, 75Daisy Thankachan, 36Shirley Thankachan, 47Ayyappan Thankanadar, 57Anish A Thankappan, 47Bejoy P Thankappan, 47Kailas N Thankappanpillai, 45

Suwat Thaniyavarn Phones & Addresses

  • 2333 157Th Pl SE, Bellevue, WA 98008 (425) 747-6396
  • Redmond, WA
  • Torrance, CA
  • Pomona, CA
  • Pasadena, CA

Work

Company: Eospace Position: Chief executive officer

Education

Degree: Graduate or professional degree

Industries

Defense & Space

Resumes

Resumes

Suwat Thaniyavarn Photo 1

Chief Executive Officer

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Location:
Seattle, WA
Industry:
Defense & Space
Work:
Eospace
Chief Executive Officer

Business Records

Name / Title
Company / Classification
Phones & Addresses
Suwat Thaniyavarn
President
EOSPACE
Fiber Optics
8711 148Th Ave NE, Redmond, WA 98052
(425) 869-8673, (425) 869-8872
Suwat Thaniyavarn
President, CTO
EOSPACE
Cable and Other Program Distribution · Electrical Contrs
8711 148 Ave NE, Redmond, WA 98052
(425) 869-8673, (425) 869-8872

Publications

Us Patents

Polarization Independent Broad Wavelength Band Optical Switches/Modulators

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US Patent:
6842569, Jan 11, 2005
Filed:
May 17, 2001
Appl. No.:
09/858914
Inventors:
Suwat Thaniyavarn - Bellevue WA, US
Assignee:
Eospace, Inc. - Redmond WA
International Classification:
G02B 626
US Classification:
385 41, 385 16
Abstract:
Optical switches based on the balanced bridge interferometer design require precisely made (or half a coupling length) directional couplers to achieve minimum crosstalk for the two switch outputs. Precision 3 dB-directional couplers require the waveguide dimensions and fabrication parameters of the evanescent region to be tightly controlled making a low crosstalk switch difficult to manufacture and expensive. A new type of balanced bridge interferometer type switch is disclosed where the input and output directional couplers are asymmetrically biased to induce a certain difference in the propagation constants between the two waveguide in the directional couplers. By using the asymmetrically biased directional couplers with a certain tuning a bias voltage for the directional couplers. Low crosstalk switches can be achieved for a very wide range of directional coupler strengths, relaxing the precise half-coupling length directional couplers required in conventional design. This relaxation of the precise directional coupler waveguide regions allows a relaxation in the manufacturing tolerance of the devices and therefore make the switch much easier to make.

High-Dynamic-Range Analog Fiber-Optic Link Using Phase Modulation And Tunable Optical Filter

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US Patent:
7660491, Feb 9, 2010
Filed:
Aug 1, 2007
Appl. No.:
11/882351
Inventors:
Suwat Thaniyavarn - Redmond WA, US
Assignee:
EOSpace, Inc. - Redmond WA
International Classification:
H04B 10/00
G02F 1/01
G02F 1/035
US Classification:
385 3, 398116, 398141, 398150, 385 1, 385 2
Abstract:
A cw-laser source transmits low-noise, narrow-linewidth optical power via an optical fiber to a bias-free electro-optic phase modulator at a remote site, where an antenna or an RF sensor is located. The RF electrical signal modulates the phase modulator at the remote site, converting an electrical signal into an optical signal. The phase-modulated optical signal is fed back via the optical fiber to an optical filter whose filter transfer characteristics can be tuned and reconfigured to cancel the intermodulation distortion terms, particularly the dominant 3order intermodulation, as well as the 2order. The filtered optical signal is converted to the RF signal at the photodetector. The optical filter is used to effectively “linearize” the signal at the receiver end, rather than at the modulator end.

High-Efficiency Optical Modulators And Implementation Techniques

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US Patent:
8582927, Nov 12, 2013
Filed:
Nov 12, 2009
Appl. No.:
12/590706
Inventors:
Suwat Thaniyavarn - Bellevue WA, US
Assignee:
EOSpace, Inc. - Redmond WA
International Classification:
G02F 1/035
US Classification:
385 2
Abstract:
A new High-Z optical modulator has a waveguide and electrodes on a substrate, a buffer layer with a low dielectric constant between the waveguide and the substrate, and a substance between the waveguide and the substrate with a dielectric constant lower than a dielectric constant of the substrate to the side and below the plane of the waveguide, thereby improving electro-optic field overlap, increasing RF speed and increasing transmission line impedance. The material with a dielectric constant lower than the substrate extends between the waveguide and the electrodes to a depth below the waveguide equal to or greater than the lateral distance between the waveguide and electrodes. This material may be air and may be introduced by cutting away portions of the substrate around the waveguide with a precision dicing saw. The electrodes may be placed even with the waveguide or below the waveguide on the cut-away portion of the substrate.

N.times.n Optical Switch Array Using Electro-Optic And Passive Waveguide Circuits On Planar Substrates

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US Patent:
57296421, Mar 17, 1998
Filed:
Oct 2, 1995
Appl. No.:
8/538143
Inventors:
Suwat Thaniyavarn - Bellevue WA
Assignee:
The Boeing Company - Seattle WA
International Classification:
G02B 626
US Classification:
385 17
Abstract:
An optical switching network includes one or more planar substrates with an optical waveguide switching array formed thereon butt-coupled to a waveguide component. The waveguide component is a planar substrate with a plurality of passive optical waveguides thereon. The input ends and output ends of the waveguides are disposed along the butt-coupled edge(s) of the waveguide component substrate. The waveguides and switches are arranged with the waveguides interconnecting the input and output switch arrays so that an incoming optical signal can be directed to any desired output on the output array. The use of planar substrates with electro-optic and passive waveguide circuits allows for a modular approach, where the active switch array substrate and the passive waveguide substrates can be optimized individually. An N. times. N switch array circuit can be formed of N sets of N. times. 1 switch arrays on the input substrate and N sets of N. times.

Wavelength-Independent Polarization Converter

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US Patent:
46919848, Sep 8, 1987
Filed:
Sep 26, 1985
Appl. No.:
6/781151
Inventors:
Suwat Thaniyavarn - Pasadena CA
Assignee:
TRW Inc. - Redondo Beach CA
International Classification:
G02B 610
US Classification:
350 9614
Abstract:
An electrooptical polarization mode converter that operates independently of the wavelength of the light being converted. The converter includes a titanium in-diffused waveguide formed in a lithium niobate substrate, but light is propagated in the direction of the optic axis, rather than perpendicular to it as in prior devices. Both transverse-electric (TE) and transverse magnetic (TM) modes experience the same material refractive index, and mode switching can be effected with only minimal phase velocity mismatch, by applying a bias voltage across the waveguide. The phase velocity mismatch is corrected electrooptically by applying an orthogonal electric field to the waveguide, and mode switching and phase velocity correction effects can be controlled independently. The resulting device is not only wavelength independent, but is insensitive to temperature changes, immune to optical damage due to the photorefractive effect and immune to problems often caused by out-diffusion of lithium oxide from lithium niobate.

.Delta..beta.-Phase Reversal Coupled Waveguide Interferometer

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US Patent:
47639741, Aug 16, 1988
Filed:
Aug 13, 1987
Appl. No.:
7/084722
Inventors:
Suwat Thaniyavarn - Bellevue WA
Assignee:
TRW Inc. - Redondo Beach CA
International Classification:
G01B 902
US Classification:
350 9614
Abstract:
An improved electro-optic coupled waveguide interferometer (50) is provided. The device comprises a single input (52), a Y-junction splitter (54), two interferometric arms (56a, 56b), a Y-junction combiner (58), a single output (60) and multiple equal-length sections of electrodes (62a-d) with alternating applied voltage polarities. The device of the invention permits use of much smaller Y-junction branching angle, which reduces scattering losses, or a shorter branching waveguide section, which allows construction of a device having an overall shorter length than prior art interferometers. The device takes advantage of a close placement of the interferometer arms, which results in a transfer of optical energy and facilitates a single-gap electrode structure for efficient push-pull operation. The use of multiple-section electrodes restores the high modulation depth otherwise destroyed by the close placement of the interferometric arms.

Semiconductor Laser Array Apparatus With Adjustable Phase Plate

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US Patent:
47649291, Aug 16, 1988
Filed:
Oct 30, 1986
Appl. No.:
6/924956
Inventors:
Suwat Thaniyavarn - Pasadena CA
Assignee:
TRW Inc. - Redondo Beach CA
International Classification:
H15
US Classification:
372 18
Abstract:
A phase-locked semiconductor laser array in which the phase of oscillation of alternate laser elements is adjusted externally to the laser cavity. A phase plate having parallel ribs of tapered thickness is positioned in close proximity to the emitting facet of a laser array, and is adjusted in position until the ribs are registered with alternate laser elements, and the thickness presented to the emitted laser beams is sufficient to cause a phase change of 180 degrees. After light from the array has passed through the phase plate, the entire set of beams is in phase and produces a practically single-lobed far-field pattern.

Phased Array Beam Controller Using Integrated Electro-Optic Circuits

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US Patent:
57512485, May 12, 1998
Filed:
May 24, 1996
Appl. No.:
8/655333
Inventors:
Suwat Thaniyavarn - Bellevue WA
Assignee:
The Boeing Company - Seattle WA
International Classification:
H01Q 322
US Classification:
342368
Abstract:
A photonic device for controlling phased array beam direction includes an electro-optic substrate; a plurality of waveguides formed in the substrate, each of which is capable of simultaneously propagating light signals with orthogonal polarizations; an input waveguide for inputting into each one of the plurality of waveguides a pair of copropagating polarized light signals having orthogonal polarizations and different frequencies; a plurality of electrodes on the substrate configured to phase shift the signals traveling through each waveguide by a different amount in response to applied voltages, thereby creating phase shifted polarized signals; and means for combining the phase shifted polarized signals within each one of the waveguides and propagating these combined signal to an antenna element. The basic operating principle of the invention is based on the differential phase shift between optical waves of orthogonal polarizations traveling in an electro-optic optical waveguide. This differential phase shift is directly proportional to the voltage applied to a control electrode and to the length of that electrode.
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Suwat Thaniyavarn from Bellevue, WA, age ~67 Get Report