Intensity-modulated linear-frequency-modulated continuous-wave lidar for distributed media: fundamentals of technique

Area of Science:

• Optics and Photonics
• Remote Sensing Technologies
• Signal Processing

Background:

• Lidar remote sensing is crucial for profiling distributed media.
• Intensity-modulation frequency-modulated continuous-wave (FMCW) lidar offers potential for this application.
• The basic FMCW technique faces challenges like bandpass filtering in distributed media.

Purpose of the Study:

• To analyze the suitability of FMCW lidar for distributed media.
• To identify limitations of the basic FMCW technique for this purpose.
• To propose and validate a modified FMCW technique for improved performance.

Main Methods:

• Conceptual analysis of FMCW lidar principles.
• Identification of bandpass filtering effects in the basic method.
• Development and computer simulation of a modified FMCW technique.

Main Results:

• The basic FMCW technique exhibits a bandpass filtering effect, limiting its application.
• A modified FMCW technique was developed to address this limitation.
• Computer simulations confirmed the modified technique's effectiveness in sounding distributed media.

Conclusions:

• The modified FMCW lidar technique successfully overcomes the bandpass filtering issue.
• This advancement enables accurate reproduction of distributed medium profiles.
• The proposed method enhances FMCW lidar's utility in remote sensing applications.