Compact multifunction digital OFDR system without using an auxiliary interferometer.

Area of Science:

• Photonics and Optical Sensing
• Semiconductor Laser Technology
• Fiber Optic Measurement Systems

Background:

• Traditional optical frequency domain reflectometry (OFDR) systems often require auxiliary interferometers.
• External interferometers in conventional OFDR setups can introduce noise, degrading measurement performance.
• Existing OFDR designs can be complex and costly due to multiple optical components.

Purpose of the Study:

• To develop an integrated, accurate, and inexpensive semiconductor laser-based OFDR system.
• To eliminate the need for an auxiliary interferometer in OFDR systems.
• To enhance the cost-effectiveness and reduce the complexity of OFDR setups.

Main Methods:

• Utilizing the fiber under test for both sensing and frequency sweep linearization.
• Implementing a single optical interferometer design.
• Leveraging semiconductor laser technology for precise frequency sweeps.

Main Results:

• The proposed system successfully mitigates and compensates for phase errors without an auxiliary interferometer.
• Experimental results show enhanced performance compared to traditional OFDR methods.
• The compact design achieves minimal OFDR system complexity with only one interferometer.

Conclusions:

• The integrated semiconductor laser-based OFDR system offers improved accuracy and cost-effectiveness.
• The simplified design reduces complexity and enhances overall performance in fiber optic sensing.
• This approach represents a significant advancement in practical OFDR implementation.