NexSolveAI Virtual Laboratories™

Optoelectronics Virtual Laboratory — VL01

Experiment 01: Temperature-Dependent Laser Diode Characterization. Learn the physics, operate virtual instruments, perform interactive experiments, analyze data, maintain a laboratory notebook, and complete assessments in one browser-based environment.

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FREE COMMUNITY EDITION

Guided Laboratory Path

Move from theory to experiment, measurement, analysis, reporting, and assessment.

01Learn02Inspect Instruments03Configure04Measure05Analyze06Document07Assess

Virtual Laboratory Modules

MODULE 01

Theory & Fundamentals

Laser-diode structure, active-region physics, thermal wavelength shift, linewidth, and Gaussian spectra.

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MODULE 02

Virtual Device

Explore the active region, p- and n-layers, cavity facets, waveguide, electrodes, and heat-flow path.

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MODULE 03

Virtual Instruments

Operate the simulated laser driver, TEC controller, optical spectrum analyzer, power meter, sensor, and oscilloscope.

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MODULE 04

Virtual Experiments

Perform guided laser-diode characterization experiments with live calculations and scientific graphs.

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MODULE 05

Data Analysis

Interpret temperature dependence, target matching, linewidth broadening, trends, and model limitations.

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MODULE 06

Laboratory Notebook

Record objectives, observations, readings, conclusions, and export experiment records.

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MODULE 07

Engineering Studio

Estimate operating temperature, optimize target wavelength, and plan thermal-control requirements.

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MODULE 08

Assessment & Viva

Complete MCQs, numerical tasks, design questions, and a virtual viva.

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Theory and Scientific Background

Temperature-dependent wavelength

The laboratory uses the first-order relation:

λpeak(T) = λ0 + kT(T − Tref)

Temperature-dependent linewidth

ΔλFWHM(T) = Δλ0 + kW|T − Tref|

Gaussian spectrum

I(λ) = I0 exp[−(λ − λpeak)²/(2σ²)],   σ = ΔλFWHM/2.355

This Community Edition uses simplified empirical equations and does not solve coupled carrier-rate, heat-flow, gain, or longitudinal-mode equations.

Virtual Laser-Diode Device

01

p-Type Layer

Provides holes to the active region and forms one side of the semiconductor junction.

02

Active Region

Carrier recombination, stimulated emission, gain, and optical generation occur here.

03

n-Type Layer

Supplies electrons and completes the injection structure.

04

Optical Cavity

Parallel facets provide feedback and define the longitudinal resonator.

Virtual Instruments

⚡

Laser Current Driver

Provides a controlled injection current for future L–I and threshold experiments.

🌡️

TEC Controller

Sets and stabilizes the simulated laser-diode temperature.

📈

Optical Spectrum Analyzer

Displays the simulated peak wavelength and spectral FWHM.

💡

Optical Power Meter

Reserved for output-power and slope-efficiency experiments.

🧭

Temperature Sensor

Reads the selected diode operating temperature.

〰️

Oscilloscope

Reserved for modulation and transient-response experiments.

Select an instrument control.
EXPERIMENT 01

Temperature-Dependent Wavelength Tuning & Output Spectrum

Experiment Controls

Temperature
operating point
Peak wavelength
thermally tuned
Spectral FWHM
calculated linewidth
Target error
peak − target

Peak Wavelength vs Temperature

Output Optical Spectrum

Calculated Analysis

Digital Laboratory Notebook

Recorded Measurements

#Temperature (°C)Peak λ (nm)FWHM (nm)Target (nm)Error (nm)
No readings recorded.

Engineering Design Studio

Target-Wavelength Design

Use Auto-Tune to estimate the temperature required to reach a specified wavelength.

Thermal-Stability Study

Estimate how a ±1°C variation changes the laser peak wavelength.

Communication-System Case

Discuss why laser wavelength stabilization matters in WDM and sensing systems.

Optoelectronics Virtual Laboratory Experiment Roadmap

Experiment 01

Temperature-Dependent Wavelength Tuning & Output Spectrum.

Experiment 02

Threshold Current versus Temperature.

Experiment 03

Light–Current Characteristics and Slope Efficiency.

Experiment 04

Output Power and Efficiency Roll-Off.

Experiment 05

External Quantum Efficiency.

Experiment 06

Longitudinal Modes and Cavity Resonance.

Experiment 07

Thermal Stability and TEC Control.

Experiment 08

Direct Current Modulation and Frequency Response.

Assessment and Virtual Viva

1. What normally happens to the emission wavelength when laser-diode temperature increases?
2. What does FWHM describe?
3. In this model, target error equals:
Complete the assessment and select Grade Assessment.

User Guide

  1. Review the theory and inspect the virtual instruments.
  2. Load a 465 nm or 650 nm preset.
  3. Change temperature, wavelength coefficient, linewidth coefficient, and target wavelength.
  4. Observe all numerical values and graphs update in real time.
  5. Use Auto-Tune to estimate the target temperature.
  6. Record multiple readings in the digital notebook.
  7. Write observations and conclusions, then export the notebook and CSV data.
  8. Complete the assessment.

Edition Structure

Community Edition

Interactive learning, Experiment 01, basic instruments, notebook, exports, and assessment.

Use Community Edition

Professional Edition

Complete experiment set, measured-data import, project saving, advanced fitting, expanded instruments, and teaching workflows.

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Research Edition

Custom optoelectronic-device and laser-diode models, uncertainty analysis, parameter sweeps, multi-device comparison, institutional deployment, and research-grade exports.

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NexSolveAI Virtual Laboratories™ — Optoelectronics Virtual Laboratory VL01 Community Edition v1.0