mkt-gab-002-en rev. 1.2. lasers commerciaux de teraxion: de la simple diode laser aux lasers...
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MKT-GAB-002-EN Rev. 1.2
Lasers Commerciaux de TeraXion:Lasers Commerciaux de TeraXion:de la simple diode laser aux lasers étroits et de la simple diode laser aux lasers étroits et
stabilisés les plus performantsstabilisés les plus performants
C. LatrasseC. Latrasse
14 mai 2010ETS, Montréal
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The information contained in this document is the sole property of Teraxion and shall not be reproduced in whole or in part, without the written authorization of Teraxion. Copyright © 2010
OutlineOutline
Company Profile
Product Lines
Laser-based Products– Narrow Linewidth Laser– Applications for Narrow Linewidth Laser– Frequency Stabilized Laser: ALMA Master Laser
Conclusion
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The information contained in this document is the sole property of Teraxion and shall not be reproduced in whole or in part, without the written authorization of Teraxion. Copyright © 2010
Company ProfileCompany Profile
Design and manufacturing of optical components, modules and solutions for Telecom, Industrial/Energy and Defense/Aerospace markets,
Private company backed by FTQ, Caisse de dépôt, Fondaction and Accès-Capital
Founded in April 2000: 10th anniversary celebrated yesterday !!
EBITDA positive since 2005 (profitable since 2007)
Employees: ~125 (scientific staff: 60, 25 M.Sc. and Ph.D.)
Headquarters: Québec City, Canada
Facilities: 32,000 ft2 (owns 18 000 ft2)
Telcordia GR-1209, 1221 and 468 products
ISO-9001:2000 registered (June 2005)
December 2002: IP acquisition of
March 2005: Acquisition of : beginning of laser activities at TeraXionbeginning of laser activities at TeraXion
Comply with Canadian Controlled Goods Program (CGP) and ITAR
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The information contained in this document is the sole property of Teraxion and shall not be reproduced in whole or in part, without the written authorization of Teraxion. Copyright © 2010
Product LinesProduct Lines
Static and Tunable Chromatic Dispersion Compensation (10, 40, 100 Gb/s, Submarine
terminals)
Market Leadership for
Tunable Dispersion Compensation
High-Power Reflectors & Temporal Pulse Shaping
of Fiber Lasers)
Market Leadership for Fiber Laser Reflectors
Narrow Linewidth and Frequency-Stabilized
Semiconductor Lasers)
Niche Markets
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The information contained in this document is the sole property of Teraxion and shall not be reproduced in whole or in part, without the written authorization of Teraxion. Copyright © 2010
Laser-based ProductsLaser-based Products
High performance
driving electronics
Telecom DFB laser diode
PureSpectrum-Laser Module
+
Linewidth Reduction
System (using FBG)
PureSpectrum-Narrow
Linewidth Laser
+ +Frequency
Stabilization to Molecular / Atomic
Line
PureSpectrum-Frequency Stabilized
Laser
ALMA Master Laser
Fiber sensing ALMA radio telescope
Wind sensing LIDAR
Interferometry, gyroscopes, RF
generation
TeraXion is involved in the development of high performance laser sources since 2005:
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The information contained in this document is the sole property of Teraxion and shall not be reproduced in whole or in part, without the written authorization of Teraxion. Copyright © 2010
Narrow Linewidth Laser using Narrow Linewidth Laser using electrical feedbackelectrical feedback
Why perform linewidth reduction:
– DFB semiconductor lasers developed for telecommunications systems are interesting sources: high power, low RIN, efficient, robust, reliable.
– For some applications, their linewidth is too high: linewidth reduction is necessary;
Principle:
– Using a frequency discriminator, the laser frequency fluctuations are converted into intensity fluctuations.
– Adequate correction is applied to the laser injection current to reduce the frequency fluctuations, thus, its linewidth.
– The frequency discriminator is a narrow -phase shifted Fiber Bragg Grating developped at TeraXion.
User Output
Frequency discriminator
Coupler
Reflected signal
FBG
IsolatorDFB Laser
Loopfilter
Laser currentdriver
Correction signal Reference
signal+
−
User OutputUser Output
Frequency discriminator
Coupler
Reflected signal
FBG
Isolator
Frequency discriminator
Coupler
Reflected signal
FBG
IsolatorIsolatorDFB Laser
Loopfilter
Laser currentdriver
Correction signal
Loopfilter
Laser currentdriver
Correction signal Reference
signal+
− Reference signal
+
−
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The information contained in this document is the sole property of Teraxion and shall not be reproduced in whole or in part, without the written authorization of Teraxion. Copyright © 2010
• Power spectral density of frequency noise (PSDFN)
Reduction by a 4-order of magnitude at low Fourier frequencies
Results with the Current Results with the Current NLL ProductNLL Product
• Optical spectrum(calculated from PSDFN)
Reduction of FWHM linewidth from several 365 kHz to <5 kHz
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The information contained in this document is the sole property of Teraxion and shall not be reproduced in whole or in part, without the written authorization of Teraxion. Copyright © 2010
Application of narrow-linewidth Application of narrow-linewidth laserslasers
Free-space interferometric sensing
Hard target detection
Fiber optic interferometric sensing
4C-OBS (Ocean Bottom Seismic)
Fiber optic distributed sensing
Perimeter security / Structure Health Monitoring
Fiber optic rotation sensing
Fiber Optic Gyroscopes
RF Generation
RF Photonics
Doppler shift position and speed
Phase change due to environment provides information
Frequency shift / strength of Brillouin BS T° and strain
Sagnac effect in fiber loop creates phase change rotation speed
RF signal produced by beating offset-frequency phase-locked lasers
Laser frequency fluctuations have to be smaller than the measured Doppler shift
Small laser phase noise (PSDFN) is required, high PSDFN can be interpreted as phase change
Laser bandwidth has to be small enough to resolve the Brillouin backscattering spectrum
Narrow laser linewidth for locking to the resonance patterns in a R-FOG
Low laser phase noise improves the RF spectral purity
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The information contained in this document is the sole property of Teraxion and shall not be reproduced in whole or in part, without the written authorization of Teraxion. Copyright © 2010
Frequency-stabilized Laser for the Frequency-stabilized Laser for the Atacama Large Millimeter Array Atacama Large Millimeter Array (ALMA)(ALMA)
66 antennae located on the Chajnantor plain of the Chilean Andes (5000 m).
The site offers dry and clear sky required to operate at mm and sub-mm .
The wavelengths covered by ALMA range from 0.3 mm to 3.6 mm – - this range is essential for probing the first stars and galaxies, directly imaging the
disks in which planets are formed, and probing the energy output from active supermassive black holes in extremely luminous starburst galaxies.
LLC
LLC
LLC
LLC
LLC
Antenna #2
Antenna #3
Antenna #4
Antenna #66
Antenna #1
Central Building
Digitization & Transmission
Digital Receivers
Correlators
PD
Correlator Data Processor Remote Servers
and Internet
27-124 GHzLO Ref
31-950 GHz Sky signal
4-12 GHz
Receivers/Mixers
Antennae
Local Oscillators
and Multipliers
27-938 GHz LO
Master Laser
Laser Synthesizer
Slave Laser
Am
pli
fica
tio
n &
D
istr
ibu
tio
n
Reflector & Freq. Shifter
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The information contained in this document is the sole property of Teraxion and shall not be reproduced in whole or in part, without the written authorization of Teraxion. Copyright © 2010
Master Laser for the ALMA Master Laser for the ALMA radiotelescoperadiotelescope
Provide a highly stable and coherent optical signal that can be carried by fibers to the antennae:
– 2002: First contact between NRAO team and DiCOS Technologies: • No commercial laser available to meet the very demanding specifications.
◊ Very high frequency stability: < 1.410-11 (= 0.1 to 10 s);◊ Very high coherence: ≥ 30 km at 50% degree of coherence;◊ Demanding environment : 5 to 35°C, half-atmosphere (5000 m elevation);◊ Lifetime: operational for 30 years;
• Only laboratory experiments have proved to meet the frequency stability and coherence specification (such as the one in Michel Tetu laboratory at Laval U. …).
Proposed Solution: – Use a very narrow linewidth fiber laser
at 1.56 um and lock it to a two-photon transition in Rubidium (0.78 um) through second harmonic generation in a PPLN waveguide;
Narrow linewidthlaser
Laser ControlsPower Setpoint
Temperature Setpoint
Error
User Optical Output1556.2108 nm
ModulatorFreq.
Doubler
778 nm
Oven
Freq. DoublerTemp. Controller
Oven
Rb OvenTemp. Controller
Reflector
Rb
Amplifier Detector
420 nmFluorescence
FluorescenceDC
Monitor
Correction SignalMonitor
Red Power Monitor
CanBus
Trigger (TTL)
Microcontroller
FluorescenceAC
Monitor
Error SignalMonitor
Corr
Input Modulation
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The information contained in this document is the sole property of Teraxion and shall not be reproduced in whole or in part, without the written authorization of Teraxion. Copyright © 2010
PerformancesPerformances
Delivery: – 2 prototypes delivered in 2003-2004:for testing at NRAO site
(Virginia).
– 2 fully-tested compact commercial units delivered in 2009:
• All specifications are met (Frequency stability & coherence, RIN, Optical power and PER stability, power consumption, electromagnetic compatibility, vibration/drop tests);
• Performances are maintained under half-atmosphere over all temperature range.
• Presently in operation at Chile high site (5000 m).
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The information contained in this document is the sole property of Teraxion and shall not be reproduced in whole or in part, without the written authorization of Teraxion. Copyright © 2010
ConclusionConclusion
Thanks to the invention of the laser, TeraXion can provide laser systems for various applications such as LIDAR, interferometry, RF photonics generation and prestigious projects such as the ALMA radiotelescopes.
Happy Birthday !