研究目的
Investigating the high-speed dynamics of a hybrid distributed feedback semiconductor laser heterogeneously integrated onto silicon in the presence of external optical feedback.
研究成果
The high-Q hybrid laser demonstrates enhanced tolerance against optical feedback, enabling a 10 Gbps floor-free transmission with minimal power penalty. This indicates its potential for isolator-free applications in future photonics integrated circuits. The study provides insights into the relationship between the laser's quality factor and its feedback sensitivity.
研究不足
The study is limited to room temperature conditions and a specific hybrid laser design. The feedback insensitivity is demonstrated up to a certain feedback level, and the practical implementation in photonics integrated circuits may require further optimization.
1：Experimental Design and Method Selection:
The study involves the experimental investigation of a hybrid III-V/Si semiconductor laser's dynamics under external optical feedback. The laser's design focuses on modal engineering to enhance the quality factor of the cavity resonator.
2：Sample Selection and Data Sources:
The hybrid laser samples are fabricated with a specific modal engineering approach, and data is collected under varying optical feedback conditions.
3：List of Experimental Equipment and Materials:
The setup includes a hybrid III-V/Si semiconductor laser, lens-end fiber with anti-reflection coating, 90/10 splitter, back reflector, erbium-doped fiber amplifier, thin band-pass filter, power meter, optical and electrical spectrum analyzer, optical switch, Mach-Zehnder modulator, error detector, and oscilloscope.
4：Experimental Procedures and Operational Workflow:
The laser's performance is evaluated under static and dynamic configurations with controlled feedback levels. The setup allows for monitoring the coupled light and analyzing the laser's response to feedback.
5：Data Analysis Methods:
The analysis includes optical and electrical spectral maps, eye diagrams, and bit error rate measurements to assess the laser's performance under feedback.
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hybrid III-V/Si semiconductor laser
Generates light in the III-V material and stores it in the low-loss silicon region to enhance the quality factor of the cavity resonator.
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lens-end fiber
Couples the emission from the laser diode to the experimental setup.
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90/10 splitter
Splits the coupled light to send 90% to the back reflector and 10% to the monitoring equipment.
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erbium-doped fiber amplifier
EDFA
Amplifies the remaining 10% of the coupled light.
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thin band-pass filter
TBPF
Filters the amplified light.
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power meter
PM
Monitors the coupled light.
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optical spectrum analyzer
OSA
Analyzes the optical spectrum of the coupled light.
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electrical spectrum analyzer
ESA
Analyzes the electrical spectrum of the coupled light.
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optical switch
SWT
Switches the monitoring equipment to analyze the coupled light.
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Mach-Zehnder modulator
MZM
Modulates the light for analysis by the error detector and oscilloscope.
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error detector
ED
Detects errors in the transmitted signal.
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oscilloscope
OSC
Analyzes the modulated light.
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