Abstract
The theoretical model and mathematical description of balanced heterodyne detection for coherent lidar were established, including the response current model and signal to noise ratio (SNR) model. Balanced heterodyne detection and common coherent detection were compared based on the two models, and the advantages of balanced heterodyne detection on elimination of LO intensity noise, improving of SNR and using of the LO power were performed. Using MATLAB numerical simulation, the advantages of balanced heterodyne detection for coherent lidar were verified, and the impact of the coupler splitting ratio, the quantum efficiency matching degree of photo electric detector and LO power on balanced heterodyne detection were analyzed, and the simulation results were given.
| Original language | English |
|---|---|
| Pages (from-to) | 1918-1922 |
| Number of pages | 5 |
| Journal | Infrared and Laser Engineering |
| Volume | 40 |
| Issue number | 10 |
| State | Published - Oct 2011 |
Keywords
- Balanced heterodyne detection
- Numerical simulation
- Signal-to-noise ratio
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