OptiSystem Training Seminar optiwave.com optiwave.jp

Transcription

1 2009 Optiwave Systems, Inc. OptiSystem Training Seminar optiwave.com optiwave.jp

2 About Optiwave Systems Leader in the development of innovative software tools in Optics Design, simulation, and optimization of components, links, systems and networks for Photonics Nanotechnology, Optoelectronics, Optical Networks Established in 1994 Licensed in 1000 industry-leading corporations and universities in over 60 countries 2

3 Photonics design portfolio System design Time and frequency domain simulators for the design of the physical or transmission layer of optical systems, subsystems and components. Component design Unique circuit design software that incorporates equations governing optical elements into an electrical simulation framework to provide selfconsistent analysis of opto-electronic circuits Based on the Beam Propagation Method (BPM), simulates light field distribution through any waveguide medium Based on FDTD and UPML boundary condition, solves the E & H fields in both the spatial and temporal domains, for advanced passive and nonlinear photonic component design Based on Coupled Mode theory and the Transfer Matrix method, simulates the design of waveguide and fiber based periodic structures Using an array of mode solvers; calculates dispersion, material losses, birefringence, and PMD to aid in optimizing parameter selection for single and multi-mode fiber designs 3

4 About OptiSystem OptiSystem is a time/frequency domain simulator for optical system design. Applications include: Optical network design (OTDM, SONET/SDH rings, CWDM, DWDM, PON, Cable, OCDMA) Single-mode/multi-mode transmission Free space optics (FSO), Radio over fiber (ROF), OFDM (direct, coherent) Amplifiers and lasers (EDFA, SOA, Raman, Hybrid, GFF optimization, Fiber Lasers) Signal processing (Electrical, Digital, All-Optical), Direct/Coherent Tx/Rx design Modulation formats (RZ, NRZ, CSRZ, DB, DPSK, QPSK, DP-QPSK, PM-QPSK, etc.) System performance analysis (Eye Diagram/Q-factor/BER, Signal power/osnr, Polarization states, Constellation diagrams, Linear and non-linear penalties) Default component library Customized components Co-simulation components System & Sub-system design layouts Signal representation & hierarchy between components, sub-systems, etc.: Binary Multilevel Electrical Optical Any type 4

5 2009 Optiwave Systems, Inc. OptiSystem Seminar Module 1: Overview of OptiSystem GUI features optiwave.com optiwave.jp

6 Module 1 OptiSystem GUI Overview Menu/tool bars Display properties Project layout Project browser Design & analysis tools Components overview Application examples Resources 6

7 OptiSystem GUI: Overview Default component library Custom Favorites Recently Used Tool bars Description docker Component library Layout Editor Project Browser Pan window Scaled view of layout Component inventory/data for all layouts associated with a Project Layout tab(s) Projects tab 7

8 OptiSystem GUI: Component library Default library 400+ components (16 libraries) Search for components via Find component or Browse features Custom Create user-defined components and sub-systems Favorites Add most often used components Recently used Display most recently used components (up to 10) 8

9 OptiSystem GUI: Menu/Tool bar functions (1) Open project Print current project Undo, Redo Calculate Visualizers Layout menu bar Set total sweep iterations Previous. Next sweep iterations New project Save current project Cut, copy, paste Calculate Add, Duplicate layouts Delete current layout Set current iteration Parameter sweeps Layout size, parameters and properties Generate script Save script Performer settings Export Performer Component, Project and Description dockers Run script Load script Find script 9

10 OptiSystem GUI: Menu/Tool bar functions(2) Layout tool Monitor tool Draw output port Draw input port Draw path Draw rectangle Draw circle Draw line Draw text label Bit map tool Zoom in Zoom out Zoom to window Zoom 1:1 Auto-connect on drop Auto-connect on move View component parameters View port signal data View component results 10

11 OptiSystem GUI: File menu functions 11

12 OptiSystem GUI: Edit menu functions (1) Layout tools. Also available via menu bars Component tools. Also available via project layout context tool 12

13 OptiSystem GUI: Edit menu functions (2) Also available via project layout context tool 13

14 OptiSystem GUI: View menu functions Also available via project layout context tool 14

15 OptiSystem GUI: Layout menu functions Also available via project layout context tool 15

16 OptiSystem GUI: Tools/Report/Help menu Also accessed via the Calculations dialog box Use this function (or the shortcut) to add new report pages Provides access to html help version of the User Reference guide 16

17 OptiSystem GUI: Display properties Access via Tools/Options 17

18 Project layout: Layout properties Name, author and date is reflected within the Layout properties header 18

19 Project layout: Accessing/modifying components View or modify all parameters linked to a component Enable or disable for simulation Access results (when available) following a calculation Create a VB script that is specific to the component 19

20 Project layout: Working with components in the layout Select links (left-click) to either delete or adjust their position Select/Copy/Delete Select individual components, or highlight groups of components; to duplicate, move or delete Drag and drop components from libraries Links Can auto-connect on drop or move or manually from an output port to an input port Non-compatible connections are flagged Monitors/Visualizers Monitors are automatically created when visualizers are attached Multiple visualizers can be connected to an output port Connections are represented by dotted lines 20

21 Project layout: Layout depth order Component and sub-systems can be allocated to different layers to simplify complicated or dense layouts 21

22 Project layout: Component properties/parameters Parameters are grouped by categories and define the input characteristics and simulation settings for the component Components can be disabled by unselecting the Enabled parameter in the Simulation tab Access component properties by double clicking on a component or by right-clicking and selecting Component Properties Parameters can either be defined directly (Normal), by using a formula/script (Script) or swept between a set of a data points (Sweep). When selected, and when View component parameters is on, the parameter value will be displayed below the component in the layout editor 22

23 Project layout: Visualizers properties/parameters Access visualizers by right clicking and selecting Component Properties Parameters used to defined measurement and graph settings 23

24 Project layout: Port properties Hover mouse over port (and right-click) to access Port Properties Label information and port position/location can only be modified for sub-systems Determine which signal data to view when View port signal data is activated. 24

25 Project layout: Data monitors & signal tracing Port data appears (after calculation) when View Port Signal data is selected Note: Calculate signal tracing must also be enabled in Global Parameters Select monitor tool and hover over output ports that you wish to add or remove data monitors Data monitors Data passed through ports can have large amounts of data (this data is saved only at ports where monitors are present) It is important to keep monitors to a minimum to reduce memory requirements! 25

26 Project layout: Adding objects and text Double click on objects to modify line and fill colors Basic tools: Lines, rectangles, circles/ellipses Add images (bit map, jpeg) to the layout Create text boxes and edit text type, font and colour 26

27 Project layout: Bill of Materials Defined in the Custom order tab for Component properties 27

28 Project browser: Overview Global layout settings including Global parameters, Sweeps and Paths Data on each component includes: Ports Parameters Results (when applicable) Graphs (when applicable) Lists all information for a project The components in the project layout are synchronized with those in the project browser view (when you click a component in the project browser, the same component is selected in the layout (and vice versa)) All information linked to any component (or the layout) can be viewed through an expandable menu tree structure 28

29 Project browser: View settings Create and access customized views 29

30 Design and analysis tools: Visualizers Optical / RF Spectrum Analyzer Resolution filter, Signal analysis Oscilloscope Amplitude, Power, Chirp EYE Diagram Analyzer Masks and Histograms BER Analyzer Numerical and quasi-analytical analysis WDM Analyzer Calculate power, wavelengths, S/N ratios Signal Analyzer Statistical analysis 30

31 Design and analysis tools: Path tool 31

32 Design and analysis tools: Graphs The graphic icons (2D/3D) appear for all graphs that can be viewed Double-click, or right click and select Quick view, to preview the graph results The Component view feature can also be used to visualize 2D and 3D graphs 32

33 Design and analysis tools: Results Displays values representing calculated data generated by a component Cab be accessed via Project browser, Component view and Component Results Checked values will be displayed in the project layout (just below the component) If a calculated value is outside the min-max points, it will be displayed in a red font 33

34 Design and analysis tools: Reports Create Tables 2D Graphs 3D Graphs Plot parameters vs. results 34

35 Design and analysis tools: Scripts Uses standard VB script language. Allows changes in the parameters of current project. Can be used for postprocessing of simulation results. 35

36 Design and analysis tools: Optimizations Single-parameter optimization Multiple-parameter optimization GFF optimization Monte Carlo Yield Estimate 36

37 Design and analysis tools: Co-simulation Matlab component Scilab component Optiwave SW tools OptiGrating OptiBPM OptiSPICE Agilent EDS file transfer 37

38 Components overview 38

39 Application examples 39

40 Digital Link Design Using Different Modulation Formats RZ, NRZ Duobinary CSRZ DPSK DQPSK 100 km 165 km 180 km 40

41 WDM Systems DWDM CWDM 41

42 Multimode Link 42

43 Ring Network 43

44 Metro Network 44

45 CATV Systems 45

46 Optical Amplifier Design EDFA YDFA EYDFA RFA 46

47 PON-Bidirectional Transmission 47

48 SCM Optical Transmission 48

49 Resources (1) Documentation OptiSystem Component Library OptiSystem Getting Started OptiSystem Tutorials Vol 1 & Vol 2 OptiSystem User Reference OptiSystem VBScripting Ref Guide Component help 49

50 Resources (2) Samples folder On-line examples Manuals (2012) Manuals 2012.zip (User: q236jd2; Pwd: r71de13) Customer support Phone: (OPTI)/ (Mon-Fri, Eastern) Feedback Optiwave community forum (User: perf38201, PW: login9371) 50

51 2009 Optiwave Systems, Inc. OptiSystem Seminar Module 2: System design optiwave.com optiwave.jp

52 Module 2 (1) Signals Global parameters Calculate tab overview Project 1: Transmitter External modulated laser Project layout Component parameters Visualizers Info-window features Project 2: Subsystems Hierarchical simulation Creating a sub-system with ports Subsystem properties Accessing global parameters Adding a custom component to the library 52

53 Module 2 (2) Project 3: Optical Systems WDM Designs Parameter groups Fiber/EDFA spans BER Analysis 3D graphs Project 4: Parameter Sweeps BER x Input power Setting up sweep iterations Browsing iteration results Analyzing results with Reports 53

54 Signals: Types & representation Binary Sequences of 1 s & 0 s Created by bit sequence generators M-ary Multi-level discrete values for advanced modulation (PAM, QAM, QPSK) Electrical Generated by electrical pulse generators and photo-detectors Sampled in time domain Optical Generated by optical sources (e.g. lasers) and optical pulse generators Sampled in time domain 54

55 Signals: Electrical Noise power spectral densities in frequency domain. Sampled signal waveform in time domain. Signal noise variances in time domain. Pulse generators Create noise-less time domain sampled waveform Photo-detectors On top of time domain sampled waveform may contain information on time variance noise (shot) or power spectral density (thermal) 55

56 Signals: Optical Adaptive noise bins Parameterized Sampled signals Sampled signals (optical sources) Time domain representation of optical signal Can be represented in independent bands or in the same continuous frequency band Spatial mode data is also available Parameterized signals Time-averaged descriptions of sampled signals (Average power, Central frequency, and Polarization state) Useful for performing a fast estimation of system performance (power budget, OSNR) Noise bins Represent optical noise via average spectral density in two polarizations (power spectral density x bandwidth) Propagated separately from the optical sampled signals (but can be combined with signals for overlapping bands 56

57 Global parameters: Simulation tab Set bit rate (Default mode) Set time window Set sample rate When enabled, closest Time window or Sample rate is found Set by the user Set by the user Always calculated (Sequence length X Samples/bit) The global Bit rate can affect components such as Bit sequence generators (which may use as a default value) and the value for the bandwidth or cut-off frequency of most electrical filters. The Time window affects all components (each component works with the same time window). This parameter is best expressed in terms of the sequence length and the bit rate used during the simulation. The global Sample rate specifies the frequency simulation window or simulation bandwidth in Hz. It can affect components such as pulse generators and optical sources that generate signals at different sample rates. It is normally best to operate all modules in the design at the same sample rate The Sequence length should be set based on the simulation objectives. Use long sequences for transmission metrics (such as eye diagrams & BER) and short sequences to study optical effects (such as pulse dispersion) 57

58 Global parameters: Simulation basics Defines the frequency spacing in the freq domain. TW = Seq. length X Bit period Df = 1/Time window = Sample rate/# samples Time domain samples = Freq domain samples Samples per bit Time spacing = 1/Sample rate The Samples per bit, or the number of samples taken over a bit period (0 or 1), must be a power of two (2, 4, 8, 16, ). The sampling rate is automatically adjusted after Samples per bit is changed The Sequence length, the number of bits that are captured within a given time (or sampling) window in seconds, must also be a power of two. The Sampling rate is calculated by taking the inverse of the sampling time T (the time interval between performing measurements on the analog signal). If the highest known or expected frequency component (non-negligible) of the signal stream is Fsample, then the sampling rate should be set to at least 2 X Fsample (Nyquist rate) to ensure good fidelity of the reconstructed signal. 58

59 Global parameters: Simulation tab (GPU) 59

60 Global parameters: Signals tab Iterations Number of signal blocks generated by each simulation. It mainly affects transmitters and components used in bidirectional simulations and in network ring design. By increasing the parameter iterations a component will repeat the previous calculation until the number of calculations is equal to the iterations. Initial Delay This parameter forces a component to generate a null signal at each output port. It affects all components and it is mainly used in bidirectional simulations. The user does not have to add delays at the component input ports if using this parameter. Parameterized Defines whether the signal output will be sampled signals (disabled) or parameterized signals (enabled). It can affect components such as optical sources and optical pulse generators. 60

61 Global parameters: Spatial effects tab The spatial effects parameters affect components that generate spatial modes, where the discretization space and the level of the discretization should be defined. The number of points per spatial mode is defined as the product of the number of points in the X and Y 61

62 Global parameters: Signal tracing tab dbm, W or mw Hz, m, THZ or nm Defines if noise floor will be calculated using interpolation OptiSystem allows for fast estimation of power and noise at each output port. This estimation is calculated every time a signal is sent to the component output port. The signal tracing parameters allow the user to control the calculation and presentation of the results 62

63 Calculate tab overview Setup optimizations for layout Start calculation Pause calculation Stop calculation Disables & cleans the signal buffers at the end of the calculation. When disabled, user can perform large number of sweeps. Calculate the whole project Calculates all the layouts and all the sweep iterations within each layout. Calculate all sweep iterations in the active layout Calculates all the sweep iterations within the current active layout only. Calculate current sweep iteration Calculates only the selected sweep iteration in the current layout. 63

64 Project 1: Transmitter External modulated laser 64

65 Project 2: Subsystems hierarchical simulation OS allows for the creation of multiple layers of subsystems. Subsystems are identical to components (icons, parameters, ports) and may comprise a group of components or other subsystems. 65

66 Project 3: Optical Systems - WDM design 66

67 Project 4: Parameters sweeps BER x Input pwr 67

68 2009 Optiwave Systems, Inc. OptiSystem Seminar Module 3: Advanced topics optiwave.com optiwave.jp

69 Module 3 Bi-directional simulation Bidirectional Simulation Working with multiple iterations (OptiSystem_Tutorials_Volume_1, pp ) Optimization APD gain optimization (single parameter goal attaining) Scripts Nested sweeps 69

70 Optimizations 70

71 Application Example: Receiver Calibration Sensitivity: The minimum amount of power required to achieve a specific receiver performance. Sensitivity: -18 dbm, Bit rate:10 GBs, Modulation: NRZ, log(ber):-10 For a given layout and parameters, optimize receiver noise until the log(ber) is equal to

72 Create System Layout 72

73 Creating Optimizations 73

74 Optimization Setup 74

75 Calculation 75

76 Results 76

77 More about Optimizations Cascaded optimizations Priority levels Parameter sweep and optimizations AGC APC Gain Flattening Filter/Equalization optimizations 77

78 Nested Parameter Sweeps If you set more than one parameter to sweep mode, you can create nested parameter sweeps. 78

79 Application Example: Spectral Gain Analysis in EDFA EDFA Gain at different signal wavelengths for different input powers Parameter 1 Signal wavelength Parameter 2 Signal Power 79

80 Sweep Setup 80

81 Sweep Setup 81

82 Sweep Setup 82

83 Combinations for nested parameter sweeps (Plotting Graphs) 83

84 Script Overview Architecture Advantages of using script Automation: access to Excel, MATLAB, etc. Low memory requirements Customization of calculation Typical applications Large number of sweeps Nested sweeps 84

85 OptiSystem Script 85

86 Setup Create design Load script template Modify template Run script Post process results 86

87 Load or Create Design 87

88 Load Script Template 88

89 Typical Script Structure 89

90 Nested Sweep Parameters 90

91 Calculation Loop 91

92 Run Script and Obtain Results 92

93 Component Script The script function allows to view or change parameter values, graphs and results of a selected component. 93

94 Component Script example Calculates the average population inversion in a doped fiber amplifier. Create the population inversion result Add the script code to calculate the average population inversion base on the Normalized population density graph. 94

95 Adding the component result 95

96 Scheduling Signal 96

97 Disconnected Component 1 1 X X Signal 97

98 Loop Control X

99 Loop Control

100 Signal Index Index = 0 Index = 1 Signal 10

101 Disconnected Bidirectional Components X X 1 X 10

102 Bidirectional Components

103 Cascading Components X X X 1 10

104 Cascading Components

105 Global Parameter: Iterations Signal 10

106 Bidirectional Simulations 10

107 Bidirectional EDFA (initial delay) 10

108 Bidirectional EDFA (delay component) 10

109 Time-Driven simulation The simulation can convert signals to Individual Samples Individual sample is a signal type that allows the users to simulate time-driven systems in the electrical and optical domain. By using time-driven simulation, users can create designs that have closed loops and feedbacks. 10

110 Time-Driven simulation Time driven simulations are slower than comparable, block mode Important global parameters are: Sequence length Samples per bit 11

111 Individual samples vs sampled signals Tool for duplicating any signal (perfect duplication) This filter operates on individual samples This filter operates on sampled signal 11

112 Gain-clamped EDFA in a ring laser 11

113 Unlimited capabilities with MATLAB Co-simulation Design and analyze algorithms for the physical layer of optical communication components and systems Analysis Data visualization, data analysis, and numerical computation of OptiSystem results Optimizations Widely used algorithms for standard and large-scale optimization. 113

114 Matlab code 114

115 Unlimited capabilities with MATLAB Co-simulation Design and analyze algorithms for the physical layer of optical communication components and systems Analysis Data visualization, data analysis, and numerical computation of OptiSystem results Optimizations Widely used algorithms for standard and large-scale optimization. 115

116 Analysis Post-Processing 116

117 Matlab code 117

118 Simulation Results 118

119 Optical Circuits (OptiBPM) Ring Ressonator 119

120 OCDMA System (OptiGrating) 12

121 OptiPerformer It is a free software that can read and simulate encrypted files exported by OptiSystem Same accuracy of OptiSystem, with a customized interface Allows users to generate files that can be shared with people who do not have a license of OptiSystem Users: students, coworkers, marketing and sales teams 12

122 OptiPerformer 12