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 Air

Air Air

SiSi

SiOSiO22

SiOSiO22

Figure 6.- 5 Result of dry oxidation of the etched silicon rounded holes:

a.) before oxidation; b.) after oxidation.

a). b).

Porous Silicon Optical Sensors

Tanya Hutter and Shlomo Ruschin

Tel-Aviv UniversityTel-Aviv University

Integrated Optics Group Tel-Aviv UniversityIntegrated Optics Group Tel-Aviv University

Optical remote sensor network

NH

3 NH

3NH3

NH

3 NH

3NH3

Ammonia storage

warehouse

Motivation (1) porous silicon sensors

ADVANTAGES:• Cheap• Small• Remote• Passive (can be

used in flammable environment)

Light source and receiving fiberPSi Sensors

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

Porous silicon surface

Gas in

Gas out

500 600 700 800 900 10000

0.5

1

Wavelength, nm

Ref

lect

ion

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-TO-ANALOG CONVERSION

USING

MULTI-ELECTRODE MACH-ZEHNDER MODULATOR

Full-Dynamic Range Optical DAC

data bits-4

DDC

M

jjijLBT

1

2 ˆ2

cos,ˆ LB i

Digital-To-Digital ConversionElectrodes lengths is NOT interrelated by factor of 2

Number of electrodes M>N

Theoretical Performance 4 bit DAC (Cont.)

N=4, M=4Duplicate 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

ME-MZMIDFT DDC

X0

X1

XNC-2

XNC-1

.

. P/S LaserDi

B1i

B2i

Fiber

DSP Optics

Our proposal

Critical sensitivity effect in an interferometer sensorRonen Levy, Shlomo Ruschin*, and Damian Goldring

Critical sensitivity effect in an interferometer sensorRonen Levy, Shlomo Ruschin*, and Damian Goldring

Sensor output power for the scanned wavelength range without illumination (Blue, solid line) and with illumination (Green, dashed line).

Splitting effect

Sensors based on frequency determination in active optical waveguides

Concept

Sensor

Pump

Architecture & detection scheme

Suitable for both remote sensing & biomedical device

Nd-doped tapered rib waveguide laser- schematic view, not drawn to scale for clarity

Monolithic rare-earth doped sol-gel tapered rib waveguide laser

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

a.

Pin Pout

b.

Z

Y

V1

TE

TM

E

E||

V2

V3 V4

1

Polarization Independent Lithium-NiobateSwitch

Patents by Shlomo Ruschin (Inventor)

Patent Number

StatusPatent nameInventorsIssue/FilingDate

ContentApplicationsSpecial Features

7653281GrantedEmbedded channels, embedded waveguides and methods of manufacturing

S. StepanovS. 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

13/055,464Application 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, bio-sensing

Based on a novel effect. Unlimited theoretical sensitivity. Experimentally demonstrated

8044835GrantedLINEARIZED OPTICAL DIGITAL-TO-ANALOG MODULATOR

Y. Ehrlichman O. Amrani, S. Ruschin

Oct 25, 2011

Integrated Optic device for fast D/A conversion. Solves a basic problem of non-linearity 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 high-constellation QAM signal modulation.

7013053GrantedPolarization independent electro-optical 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

6552864GrantedBeam generation method and system

S. RuschinApr 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 near-field optics

6625366GrantedPolymer 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

13/233158Applied forDEVICE 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 waterApplied for in US, Chine, Europe

7447391GrantedPlanar-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.

12/402,539Applied forLIGHT-EMITTING INTRA-CAVITY INTERFEROMETRIC 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

7486437GrantedApparatus 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