combining component characterization and simulation to...
TRANSCRIPT
Combining Component Characterization and Simulation to Enable the Next Generation
Optical Network
A Luna Technologies Webinar Cosponsored by RSoft Design Group
Luna Technologies:Dr. Brian Soller - DirectorEd Valigursky - VP Sales
RSoftDr. Gary Shaulov - Senior ScientistJigesh K. Patel - Senior Applications
Engineer
Agenda
• Marketplace Overview• Issues, Means, Impact• Optical Vector Analysis Live Demo• Network Simulation Example With
Optsim• RSoft Overview• Luna Technologies Overview• Questions and Wrap-Up
Marketplace Overview
• Margins have eroded• Things are turning up• Cost cutting techniques and efficiencies are
the keys to success• Techniques need to be quickly and easily
ported into R&D and manufacturing• Challenges
– New specifications (GD, CD, PMD, SOPMD)– Customers are pushing back test on suppliers– Sampling lengthens the sales cycle– More complicated designs and tunable devices
• Long list of required measurements– IL, RL, PDL, CD, GD, PMD, SOPMD, etc.
• Extremely tight parametric specifications– IL/PDL 0.01 dB accuracy with 60 dB D.R.– GD/PMD 50 fs accuracy with 40 dB D.R.
• Narrow λ resolution and accuracy– Resolution < 1pm, accuracy ~ 1pm
• High channel count with multiple in/out ports (100 +)
• Multiple operational states per channel (add/drop, dynamic gain, etc.)
Component Test: Issues
-80
-60
-40-20
0
IL (d
B)
15701565156015551550
wavelength (nm)
Component Test: Means
• Light source (laser, broad band)
• Polarization controller• Modulator (for dispersion)
• Detectors/Power meters• Optical spectrum analyzer
• Multiple instruments/connects & disconnects• Long test times due to multiple
techniques
Component Test: Impact
• Increased man hours– Elongated test times on multiple, slow test-sets– Increased fiber and component handling– Multiple people required to manage test stations
• Increased investment dollars– Multiple, expensive stations required– Maintenance and upkeep is expensive– Time of test translates to cost
• Customer returns and bad yields
The Luna Solution:
• Industry’s first all parameter analyzer for fiber components and modules
• Industry’s only completely integrated solution for Loss, Dispersion, PDL, PMD, etc.
• More comprehensive testing and inspection in less time
The Optical Vector Analyzer
Optical Vector Analysis
( ) ( ) ( )( ) ( )H
A B
C D
ω ωω
ω ω
=
DUT is completely characterized by four independent complex functions. From H(ω), calculate IL, PDL, GD, CD, PMD, etc.
The Result
• Greatly increased speed of test• Complete measurement integration• Ultimate accuracy and resolution• Ease of use
Dramatic design and manufacturing cost reduction…
Measurement Example: Tunable Filter
Laser Interferometry
• Laser is frequency tuned
• Four elements of transfer function are
measured simultaneously for every λ
DUT
PBS
∆τADC
∆τp
TLS
OVAe Product Highlights
• All Parameter Analysis - Obtain all parameters in a single scan
• Exclusive Linear Transfer Function Measurement – See true component performance in terms of EOP and BER
• Industry Leading Speed - Fully specified measurements for all parameters over C-band in 15 seconds
• Industry leading Accuracy – No compromising accuracy for speed
• World Class Support Team
Outcome
• Time– Saves time in all stages of the test cycle – Increases overall efficiency– Time of test down by 85%– Design cycles reduced by 60%
• Money– Saves Hard Dollars in yield loss– Saves in cap-ex– Saves in labor– Cost-of-test from 18% to <4% of COGS– Customer returns from 30% down to <1%– Creates testing differentiator for the product
Introduction to OptSim
�Motivation using simulation tools
�Reduced costs and time to market
� Flexibility of estimating device performance under a
variety of design objectives
� Unique features of OptSim
� Virtual laboratory with over 600 available components
and fibers
� Fast learning curve, intuitive user interface
� Twin Simulation Engines: Block-Mode and Sample-Mode
� User-friendly MATLAB® interface with full co-simulation
feature
� Interfaces with laboratory test equipment: Luna
Technologies Optical Vector Analyzer (OVA) and others
� DWDM/CWDM amplified systems
� Back-haul, metro core, and access optical networks
� P2P, P2M, M2M, mesh, and ring network architectures
� Ultra long-haul terrestrial and submarine systems
� FTTx/PON systems
� OTDM/OCDMA systems
� CATV Digital/Analog systems
� Optical LANs – 1 and 10 Gigabit Ethernet
� Optical interconnects
� Soliton systems
� Free-space optics (FSO) systems
OptSimTM: Typical Applications
Luna OVA to OptSim Interface
� Jones Matrix vs. wavelength – Linear Transfer Function• Completely characterizes the device, from which Insertion Loss,
Return Loss, Polarization Dependent Loss, Group Delay, Differential Group Delay, Chromatic Dispersion, Polarization Mode Dispersion (PMD), wavelength response can be extracted
� OptSim accepts the LTF file data to completely characterize the device in system simulations• Evaluate system performance of measured component• Compare simulations using different measured components to
determine effect of component variations on system performance
• Optimize system design for actual component characteristics
=
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)()(
)()(
)(
)(
,
,
2221
1211
,
,
ωω
ωωωω
ωω
iny
inx
outy
outx
E
E
JJ
JJ
E
E
Dispersion Compensating Grating
Measured Data
Linear Transfer Function Analysis
OptSim model reads Luna OVA measurement data and loads it to use for system simulation
Simulation Example 1: FBG (-vedispersion)
�Device under Test – Fiber Bragg Grating with negative dispersion slope and total dispersion about –800 ps/nm
Dispersion Compensation Example
� Transmitter: 10 Gbps NRZ
externally modulated,
1588.2nm
� Output from transmitter
goes to device under test
– FBG
� Output from FBG goes to
45 km of SMF-28 fiber
with 17 ps/nm/km
dispersion at 1550nm
� FBG acts as dispersion
pre-compensation
Simulation Example 2: FBG (+ dispersion)
FBG with positive dispersion -
post-compensation example
Conclusion
�Ensuring QoS requires design validations using advanced simulation technologies, like OptSim, at the physical layer
�Accurate device modeling requires high-resolution measurement of performance parameters, like those obtained from Luna Optical Vector Analyzer (OVA)
�Interface between Luna OVA and OptSimoptical communication system simulation software provides added value to both component test & measurement, and network modeling, simulation, and design.
About RSoft
� Leader in Photonic Design and Simulation Software
� Founded in 1991
� Headquarters: Ossining, NY
� US Locations: Chicago, IL and Milpitas, CA
� International Locations: U.K. and Japan
� International Distributors:
- Italy - France - Australia
- China - Taiwan - Korea
- Singapore - India - Israel
� Industrial Consortium/Collaboration:
- PCAD: photonic devices and systems
- DataPipe: low cost high-performance optical data-links
- Advanced Laser Manufacturing: Design automation for lasers
- Navy SBIR for Fiber Optic Simulation: Systems for 10Gb Ethernet
BeamPROPFullWAVEBandSOLVE GratingMOD DiffractMODLaserMODFemSIMMOST
BroadbandSWATWirelessSWAT
Artifex
MetroWAND
OptSim ModeSYS
EDFA for Vendors
RSoft Design Group Product Family
Component SuppliersResearch Institutions
Component SuppliersEquipment Vendors
Service ProvidersConsultants Investors
CarriersSystems Integrators Equipment Vendors
Contact Information
RSoft Design Group400 Executive Boulevard, Suite 100
Ossining, NY 10562
Phone: (914) 923-2164Fax: (914) 923-2169
E-mail: [email protected]
http://www.rsoftdesign.com
About Luna
• Luna Innovations commercializes technology in advanced materials, life sciences, sensing and industrial instrumentation
• Founded 1992 with six VA locations
• Luna Technologies, a division of Luna Innovations: Focused on measurement instrumentation for fiber-optic components and subsystems
• World headquarters in Blacksburg, VA
• World-wide sales offices and representation
