Transcript Slide 1

Photonic devices for optical
processing, communication and
sensing
Shlomo Ruschin
Tel-Aviv University
Tubular dye-polymer waveguides embedded in
silicon
Tubular dye-polymer waveguides embedded in
silicon
Air
SiO2
Air
Air
SiO2
Si
Air
Si
a.)
Figure 6.- 5 Result of dry oxidation of the etched silicon rounded holes:
a.) before oxidation; b.) after oxidation.
b.)
Tel-Aviv
University
Porous Silicon Optical
Sensors
Tanya Hutter and Shlomo Ruschin
Integrated Optics Group Tel-Aviv University
Optical remote sensor network
Motivation (1) porous silicon
sensors
Light source and
receiving fiber
PSi Sensors
Ammonia
storage
warehouse
ADVANTAGES:
• Cheap
• Small
• Remote
• Passive (can be
used in flammable
environment)
N
N
H3N
H3N
H3 NH3 H3 NH3
ALARM !
Multi-Sensing Principle
•
Sensor array concept.
•
Each section is made of porous silicon with a different functionality.
•
White light is collimated to illuminate the entire sample.
•
The reflected light from all the sections is measured simultaneously in a
non-imaging configuration using a single detector.
•
The obtained spectrum consists of many overlapping interference spectra
each reflected from a different sensor section.
Multi-Sensing Principle
Gas
out
Porous
silicon
surface
Gas
in
Reflection
1
0.5
0
500
600
700
800
Wavelength, nm
900
1000
METHODS FOR INCREASING RELIABILITY IN GAS DETECTION
BASED ON INDCATOR GRADIENT IN A SENSOR ARRAY
Device and method for creating sub-wavelength
sized light spots with increased depth of field
Device and method for creating sub-wavelength sized light
spots with increased depth of field
OPTICAL DIGITAL-TOANALOG CONVERSION
USING
MULTI-ELECTRODE
MACH-ZEHNDER MODULATOR
Full-Dynamic Range Optical
DAC
Digital-To-Digital Conversion
Electrodes lengths is NOT
interrelated by factor of 2
4 - bits data
Number of
electrodes
M>N
DDC



2

T Bˆ i , L  cos 
2

ˆ
 Bij L j 
j 1

M
Theoretical Performance 4 bit
DAC (Cont.)
N=4, M=4
Duplicate Levels
Photonic D/A converter
Lithium Niobate chip with
several photonic D/As
packaged D/As ready
for measurements
D/A #9 with no voltage
applied
Y-coupler #2
Conceptual Coherent Optical
OFDM Transmitter
Our proposal
X0
B1i
X1
.
.
Di
IDFT
XNC-2
P/S
DDC
Laser
ME-MZM
Fiber
B2i
XNC-1
DSP
Optics
Critical sensitivity effect in an interferometer sensor
Ronen Levy, Shlomo Ruschin*, and Damian Goldring
Critical sensitivity effect in an interferometer sensor
Ronen Levy, Shlomo Ruschin*, and Damian Goldring
Splitting effect
Sensor output power for the scanned wavelength range without
illumination (Blue, solid line) and with illumination (Green, dashed line).
Sensors based on frequency determination in
active optical waveguides
Concept
l
Architecture & detection scheme
Suitable for both remote sensing & biomedical
device
Monolithic rare-earth doped sol-gel tapered rib waveguide laser
Nd-doped tapered rib waveguide laser- schematic view, not drawn to
scale for clarity
Emission spectra of the laser device for
different input pump powers.
Output lasing power as a function of input pump
power for different pump wavelengths
Polarization Independent Lithium-Niobate
Switch
Basic Scheme
1
Pout
Pin
a.
V1
V3
V2

TE
Z
TM
E
E||
Y
b.
V4
Polarization Independent Lithium-Niobate
Switch
Patents by Shlomo Ruschin (Inventor)
Patent
Number
Status
Patent name
Inventors
Issue/Filin
g
Date
Content
Applications
Special Features
7653281
Granted
Embedded channels,
embedded waveguides
and methods of
manufacturing
S. Stepanov
S. Ruschin,
Jan 26,
2010
Optical waveguides
embedded in Silicon,
structure and manufacturing
are disclosed.
Fast data buses for
interconnects in
micro-processors
Very strong claim
granted. Basically most
optical channel running
beneath a Silicon chip are
covered. Experimentally
demonstrated
13/055,464
Application
submitted
ENHANCED
SENSITIVITY
INTERFEROMETRIC
SENSORS
Ronen Levy,
Shlomo
Ruschin
Jul 23,
2009
General method of
improving drastically the
sensitivity of interferometric
sensors
Sensing of :
motion,
environment
pollution, water,
vibrations, biosensing
Based on a novel effect.
Unlimited theoretical
sensitivity.
Experimentally
demonstrated
8044835
Granted
LINEARIZED
OPTICAL DIGITALTO-ANALOG
MODULATOR
Y. Ehrlichman
O. Amrani,
S. Ruschin
Oct 25,
2011
Integrated Optic device for
fast D/A conversion. Solves
a basic problem of nonlinearity between input
voltage and optical
transmission.
Signal processing
at ultra-high rates.
Transmission of
fast optical signals
without distortion
Increases capacity of
optical fiber links. Can be
extended to highconstellation QAM signal
modulation.
7013053
Granted
Polarization
independent electrooptical device for
modulation of light
S. Ruschin,
A. Kaplan
Mar 14,
2006
Device for modulating light
into an optical fiber. The
performance is basically
independent from the
polarization state of the light
Fiber-optic
communication
networks
Allows the modulation
anywhere in the network.
Allows implementation
without Polarization
maintaining fibers .
Experimentally
demonstrated
6552864
Granted
Beam generation
method and system
S. Ruschin
Apr 22,
2003
Device and method for
creating sub-wavelength
sized light spots with
increased depth of field
High density data
storage. High
resolution
microscopy
Very strong claim
granted. May cover many
devices based on nearfield optics
6625366
Granted
Polymer on substrate
waveguide structure
and corresponding
production method
Shlomo
Ruschin,
Tali Hurvits
Sep 23,
2003
Substrate-waveguide
arrangement, allowing
combination of glass and
polymer waveguide
Fiber-optic
communication,
passive and active
devices, sensing
Provides solution for
easy connecting and
packaging polymer
waveguides
13/233158
Applied for
DEVICE AND
METHOD FOR
OPTICAL SENSING
OF SUBSTANCES
OR
ENVIRONMENTAL
CONDITIONS
Shlomo
RUSCHIN,
Tanya
HUTTER
Sep 15,
2011
Arrangement for
simultaneous sensing of a
plurality of substances or
environmental conditions
Environmental
monitoring.
Remote sensing by light
or laser beam.
Simultaneous sensing of
several pollutants in air
or water
Applied for in US,
Chine, Europe
7447391
Granted
Planar-resonator based
optical chemo- and
biosensor
A. Peled,
M. Nathan,
S. Ruschin,
T. Zohar
Nov 4,
2008
Chemo and biosensor based
on a light emitting
waveguide and on specific
binding
Chemical,
environmental and
biological sensing.
High sensitivity.
Incorporates the light
source (laser).
Experimentally
demonstrated.
12/402,539
Applied for
LIGHT-EMITTING
INTRA-CAVITY
INTERFEROMETRI
C SENSORS
A. Peled,
M. Nathan,
S. Ruschin,
Y. Betzalel,
J. Rishpon
Mar 12,
2009
Chemo and biosensor based
on a light emitting
waveguide and on specific
binding. Incorporates
waveguide interferometer
Chemical,
environmental and
biological sensing.
High sensitivity.
Incorporates the light
source (laser).
Experimentally
demonstrated in lab
7486437
Granted
Apparatus and method
for optical
amplification in
indirect-gap
semiconductors
S. Ruschin,
S. Stepanov
Feb 3,
2009
Amplification of light in a
waveguide made of an
indirect-gap semiconductor,
incl. Silicon. Based on
optical pumping
Fiber optic
communication,
Inter-chip optical
links
Silicon-based laser or
amplifier source. Effect
observed in lab but no
fully understood