研究目的
To establish a driving current based model describing the optical heterodyne output of a monolithic dual-wavelength DFB laser and demonstrate its influence on radio frequency signal generation and output characteristics.
研究成果
A current-dependent model for a monolithic dual wavelength DFB laser device was successfully established, predicting RF or optical output characteristics. The model is reliable for low to medium current ranges but may have errors at high driving currents. It enhances understanding of device performance and can be used for future design improvements.
研究不足
The linear wavelength–current relationship may fail at high current levels, leading to inaccuracies in the model. Higher temperatures at high current levels could also affect carrier concentration and non-linear effects.
1：Experimental Design and Method Selection:
The study employs a linear relationship between driving current and laser output wavelength to model the optical heterodyne output of a monolithic dual-wavelength DFB laser.
2：Sample Selection and Data Sources:
Actual measured data from real devices are used for initial parameter extraction.
3：List of Experimental Equipment and Materials:
A two-section monolithic DFB laser with nano-scale DBR as the coupler is used.
4：Experimental Procedures and Operational Workflow:
The optical output of the laser is coupled into fiber, amplified by an EDFA, and then fed into either a high speed photodetector and signal analyzer for RF readout or an optical spectrum analyzer for optical spectrum analysis.
5：Data Analysis Methods:
The model is used to analyze the influence of different laser parameters on RF signal generation and output characteristics.
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