DBR LASER INTERCONNECT Simulation
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1 DBR LASER INTERCONNECT Simulation High-Speed Circuits & Systems Lab. Dept. of Electrical and Electronic Engineering Optoelectronics (16/2) Page 1
2 Lumerical Solutions 3D Maxwell solver(fdtd) Modal analysis(mode) Hierarchical Simulation(INTERCONNECT) Please download 2016b version! Optoelectronics (16/2) Page 2
3 INTERCONNECT Window Element Library Schematic Editor Property & Results View Command Window Optoelectronics (16/2) Page 3
4 Fabry-Perot(FP) Laser Several Types of LASERs Optoelectronics (16/2) Page 4
5 Simulation Setup Optoelectronics (16/2) Page 5
6 Gain Medium(TWLM) Standards :Frequency, structure of laser Properties Recombination Gain :Gain curve shape Drag & Drop Mode1 :Loss, n g, facet reflectivity Optoelectronics (16/2) Page 6
7 Structure of laser(standard) Properties of TWLM Recombination A B C A: monomolecular B: bimolecular C: Auger Optoelectronics (16/2) Page 7
8 Gain shape Properties of TWLM g f, N = g peak L f c, Q g peak = a p (N N tr ) a p N tr Mode setting Γ Reflectivity Facet reflectivity can be used for Febry-Perot laser simulation Optoelectronics (16/2) Page 8
9 DC source Current vs Power Schematic Optical power meter Simulate, and sweep setup! Sweep DC amplitude, save result of power Optoelectronics (16/2) Page 9
10 Sweep Setup & Results OPWM Mode1 Power Optoelectronics (16/2) Page 10
11 Febry-Perot Laser Schematic Optical Spectrum Analyzer (Frequency-domain result) 0.05 DC Source Analyzers Optical Optical Spectrum Analyzer Optical Oscilloscope (Time-domain result) Analyzers Optical Optical Oscilloscope Carrier density Oscilloscope (Time-domain result) Analyzers Electrical Oscilloscope Optoelectronics (16/2) Page 11
12 FP Laser Simulation Results TWLM gain curve Click here and click object to view result Optoelectronics (16/2) Page 12
13 FP Laser Simulation Results OSA Optical Oscilloscope(Mode1) Electrical Oscilloscope Optoelectronics (16/2) Page 13
14 Distributed Bragg Reflector LASER Single-mode by Bragg grating structure Phase tuning region can be controlled with another DC bias Optoelectronics (16/2) Page 14
15 DBR Laser Schematic R=0 R=0.3 Bragg-grating Phase tuning Waveguide Gain medium Each response analysis is necessary Grating response, FP response(gain medium + waveguide + phase tuning) Optoelectronics (16/2) Page 15
16 Bragg Grating Optical Network Analyzer (Gain simulation) Optical Network Analyzer setup Bragg Grating setup Waveguide Gratings Bragg Grating Optoelectronics (16/2) Page 16
17 Bragg Grating Simulation Result Click ONA Result View Input1 Mode1 plot gain Optoelectronics (16/2) Page 17
18 Laser Without Bragg Grating DC=0 (No pumping) 2 Monitors R=0 R=0.3 Ideal mirror(r=0.3) Optoelectronics (16/2) Page 18
19 Model Setup Waveguide setup Waveguide Straight waveguide Optical modulator setup Modulators Optical Optical Modulator Measured Double click, edit Mirror setup Passives Optical Optical Mirror TWLM setup Same as FP simulation, but two changes First row: Input source Second row: n eff changes ONA setup Same as Bragg grating simulation (page 16.) Spontaneous factor should be zero to clearly verify response Optoelectronics (16/2) Page 19
20 Simulation Result Click ONA Result View Input1 Mode1 plot gain Optoelectronics (16/2) Page 20
21 DBR Laser DC=0 (No pumping) R=0 R=0.3 Bragg Grating Same models in previous simulations (Bragg grating instead of mirror) Optoelectronics (16/2) Page 21
22 Simulation Result Click ONA Result View Input1 Mode1 plot gain Optoelectronics (16/2) Page 22
23 DBR Laser with Pumping Schematic Optical Spectrum Analyzer Source for phase tuner DC = 0.05 (Pumping) Spontaneous factor should not be zero for stimulus of lasing (0.0001) Optoelectronics (16/2) Page 23
24 Simulation Result OSA Optical Oscilloscope(Mode1) Electrical Oscilloscope Optoelectronics (16/2) Page 24
25 Phase Tuned Simulation Peak frequency can be tuned with phase tuning Optoelectronics (16/2) Page 25
26 Design Exercise3 a) With Bragg-gating frequency as THz( nm), simulate three different gain response simulation without phase tuning. Also, plot the optical spectrum with optical pumping. Compare & analyze the result with the simulation results obtained in the class. -Bragg-grating, FP, DBR simulation b) With phase tuning, find out DC source value for optimal lasing. Explain how to get the value. Also, analyze the simulation results with theoretical background. Due date: 27 Dec. PM B629 Optoelectronics (16/2) Page 26
DBR LASER INTERCONNECT Simulation
DBR LASER INTERCONNECT Simulation High-Speed Circuits & Systems Lab. Dept. of Electrical and Electronic Engineering Optoelectronics (17/2) Page 1 Lumerical Solutions 3D Maxwell solver(fdtd) Modal analysis(mode)
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