Hello all
I have a problem when I connect the attachment in the picture to the opti system program. I do not get “out put” on the optical spectrum analyzer. Can you help me with that? I would be grateful to all of you.Article titled “Ultra-narrow bandwidth and large tuning range single-passband microwave photonic filter based on Brillouin fiber laser"
Optik fiber ile elektrik kablo arasında bağlantı kurulamayabilir. Bu yüzden sistem programlama cihazı yetersiz gelebilir. Tercihinizi optik fiberden yana kullanıp sistem cihazınızı değiştirebilirsiniz.
https://www.researchgate.net/publication/378930775_Enhanced_Counterfeit_Detection_of_Bangladesh_Currency_through_Convolutional_Neural_Networks_A_Deep_Learning_Approach
Troubleshooting the Experimental Setup
The lack of output on the optical spectrum analyzer (OSA) in the depicted experimental setup for the "Ultra-narrow bandwidth and large tuning range single-passband microwave photonic filter based on Brillouin fiber laser" can be attributed to several potential issues. Let's explore some troubleshooting steps:
1. Signal Generation and Modulation:
- Verify Laser Functionality: Ensure both Laser 1 (carrier) and Laser 2 (pump) are operational and emitting at the designated wavelengths. Check their power levels and stability.
- Modulator Operation: Confirm the proper functionality of the phase modulator (PM). Verify the RF signal generator is providing the correct frequency (fRF) and power level to the modulator.
- Polarization Alignment: The polarization controllers (PCs) need to be adjusted to ensure proper polarization alignment for optimal interaction within the system.
2. Brillouin Laser Resonator:
- Circulator Alignment: The circulator's alignment is crucial for directing the light path correctly. Ensure that the input and output ports are connected as per the diagram.
- SBS Threshold: Verify that the pump power from Laser 2 exceeds the stimulated Brillouin scattering (SBS) threshold within the Brillouin fiber laser resonator. This is essential for generating the Brillouin gain spectrum.
- Resonance Condition: The cavity length of the Brillouin laser resonator must satisfy the resonance condition for the desired frequency. Fine-tuning of the cavity length might be needed.
3. Detection and Analysis:
- Photodetector Responsivity: Ensure the photodetector (PD) is responsive to the optical signal's wavelength range and has sufficient bandwidth to detect the modulated signal.
- Optical Spectrum Analyzer (OSA): Verify the OSA's wavelength range and resolution settings are appropriate for observing the optical signal. It is also important to check the input power level to avoid saturation.
- RF Spectrum Analyzer/Vector Network Analyzer (VNA): For analyzing the modulated RF signal, ensure the VNA or RF spectrum analyzer is set to the correct frequency range and resolution bandwidth.
4. Additional Considerations:
- Fiber Connections and Losses: Inspect all fiber connections for cleanliness, proper alignment, and secure mating. Excessive losses in the system can diminish the signal below detectable levels.
- Component Damage: Check for any potential damage to optical components such as the PM, circulator, or couplers.
- Environmental Factors: External factors like temperature fluctuations and vibrations can impact the stability and performance of the system.
Bir önceki cevaba ek olarak, Devrede iletken ve yalıtkan bölgelerin kontrol edilmeli, döngü gerçekleşen bölgelerde sirkülasyonun tamamlanması, sirkülasyonun eksik olduğu yerlerde yeni sirkülasyon ve döngüler eklemek gerekir.
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